Quarterly Schedule of Portfolio Holdings of Registered Management Investment Company (n-q)

Share Name	Share Symbol	Market	Type
Helios Strategic I	NYSE:HSA	NYSE	Ordinary Share

	Price Change	% Change	Share Price	High Price	Low Price	Open Price	Shares Traded	Last Trade
	0.00	0.00%	6.59				0.00	01:00:00

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF

REGISTERED MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-4492

MFS SERIES TRUST X

(Exact name of registrant as specified in charter)

111 Huntington Avenue, Boston, Massachusetts 02199

(Address of principal executive offices) (Zip code)

Susan S. Newton

Massachusetts Financial Services Company

111 Huntington Avenue

Boston, Massachusetts 02199

(Name and address of agents for service)

Registrant’s telephone number, including area code: (617) 954-5000

Date of fiscal year end: May 31*

Date of reporting period: August 31, 2013

This Form N-Q pertains only to the following series of the Registrant: MFS Absolute Return Fund, MFS Aggressive Growth Allocation Fund, MFS Conservative Allocation Fund, MFS Emerging Markets Equity Fund, MFS Global Bond Fund, MFS Growth Allocation Fund, MFS International Diversification Fund, MFS International Growth Fund, MFS International Value Fund and MFS Moderate Allocation Fund. The remaining series of the Registrant have fiscal year ends of 7/31.

ITEM 1.

SCHEDULE OF INVESTMENTS.

QUARTERLY REPORT

August 31, 2013

LOGO

MFS® AGGRESSIVE GROWTH ALLOCATION FUND

LOGO

PORTFOLIO OF INVESTMENTS

8/31/13 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.


Issuer	Shares/Par		Value ($)
Underlying Affiliated Funds - 99.9%
MFS Commodity Strategy Fund - Class R5 (v)		7,805,582	$	68,376,898
MFS Emerging Markets Equity Fund - Class R5		893,418		26,516,632
MFS Global Real Estate Fund - Class R5 (v)		4,610,852		65,520,208
MFS Growth Fund - Class R5 (a)		2,933,286		173,503,890
MFS International Growth Fund - Class R5		4,084,991		105,515,328
MFS International New Discovery Fund - Class R5		1,999,194		52,778,733
MFS International Value Fund - Class R5		3,397,999		105,168,081
MFS Mid Cap Growth Fund - Class R5 (a)		10,890,360		133,624,720
MFS Mid Cap Value Fund - Class R5		7,204,063		132,410,673
MFS New Discovery Fund - Class R5 (a)		1,215,955		33,609,000
MFS New Discovery Value Fund - Class R5		2,661,642		33,243,902
MFS Research Fund - Class R5		3,579,613		119,093,720
MFS Research International Fund - Class R5		6,491,703		105,230,504
MFS Value Fund - Class R5		5,757,041		171,674,960
Total Underlying Affiliated Funds			$	1,326,267,249

Money Market Funds - 0.0%
MFS Institutional Money Market Portfolio, 0.09%, at Net Asset Value (v)		67	$	67
Total Investments			$	1,326,267,316

Other Assets, Less Liabilities - 0.1%				922,141
Net Assets - 100.0%			$	1,327,189,457

(a)	Non-income producing security.

(v)	Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

Supplemental Information

8/31/13 (unaudited)

(1) Investment Valuations

Open-end investment companies (underlying funds) are generally valued at their net asset value per share. The investments of underlying funds managed by the adviser are valued as described below. For purposes of this policy disclosure, “fund” refers to the underlying fund in which the fund of fund invests.

Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as provided by a third-party pricing service on the market or exchange on which they are primarily traded. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation as provided by a third-party pricing service on the market or exchange on which such securities are primarily traded. Equity securities held short, for which there were no sales reported for that day, are generally valued at the last quoted daily ask quotation as provided by a third-party pricing service on the market or exchange on which such securities are primarily traded. Debt instruments and floating rate loans (other than short-term instruments), including restricted debt instruments, are generally valued at an evaluated or composite bid as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less generally are valued at amortized cost, which approximates market value. Exchange-traded options are generally valued at the last sale or official closing price as provided by a third-party pricing service on the exchange on which such options are primarily traded. Exchange-traded options for which there were no sales reported that day are generally valued at the last daily bid quotation as provided by a third-party pricing service on the exchange on which such options are primarily traded. Options not traded on an exchange are generally valued at a broker/dealer bid quotation. Foreign currency options are generally valued at valuations provided by a third-party pricing service. Futures contracts are generally valued at last posted settlement price as provided by a third-party pricing service on the market on which they are primarily traded. Futures contracts for which there were no trades that day for a particular position are generally valued at the closing bid quotation as provided by a third-party pricing service on the market on which such futures contracts are primarily traded. Forward foreign currency exchange contracts are generally valued at the mean of bid and asked prices for the time period interpolated from rates provided by a third-party pricing service for proximate time periods. Swap agreements are generally valued at valuations provided by a third-party pricing service, which for cleared swaps includes an evaluation of any trading activity at the clearinghouses. Open-end investment companies are generally valued at net asset value per share. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. Values obtained from third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, and other market data. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund’s valuation policies and procedures, market quotations are not considered to be readily available for most types of debt instruments and floating rate loans and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services. In addition, investments may be valued at fair value if the adviser determines that an investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur on a frequent basis after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund’s net asset value may be deemed to have a material effect on the value of securities traded in foreign markets. Accordingly, the fund’s foreign equity securities may often be valued at fair value. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Supplemental Information (unaudited) – continued

Level 3 includes unobservable inputs, which may include the adviser’s own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2013 in valuing the fund’s assets or liabilities:


Investments at Value	Level 1		Level 2		Level 3		Total
Mutual Funds		$1,326,267,316		$—		$—		$1,326,267,316

For further information regarding security characteristics, see the Portfolio of Investments.

(2) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:


Aggregate cost	$900,043,668
Gross unrealized appreciation	432,801,931
Gross unrealized depreciation	(6,578,283	)
Net unrealized appreciation (depreciation)	$426,223,648

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

(3) Transactions in Underlying Affiliated Funds – Affiliated Issuers

An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. For the purposes of this report, the fund assumes the following to be affiliated issuers:


Underlying Affiliated Funds	Beginning Shares/Par Amount		Acquisitions Shares/Par Amount		Dispositions Shares/Par Amount			Ending Shares/Par Amount
MFS Commodity Strategy Fund		7,268,356		656,633		(119,407	)		7,805,582
MFS Emerging Markets Equity Fund		779,537		113,918		(37	)		893,418
MFS Global Real Estate Fund		4,039,061		571,791		—			4,610,852
MFS Growth Fund		2,956,978		11,230		(34,922	)		2,933,286
MFS Institutional Money Market Portfolio		807,417		17,633,154		(18,440,504	)		67
MFS International Growth Fund		3,885,087		209,331		(9,427	)		4,084,991
MFS International New Discovery Fund		1,931,625		67,779		(210	)		1,999,194
MFS International Value Fund		3,347,007		55,245		(4,253	)		3,397,999
MFS Mid Cap Growth Fund		11,136,011		17,276		(262,927	)		10,890,360
MFS Mid Cap Value Fund		7,329,072		21,671		(146,680	)		7,204,063
MFS New Discovery Fund		1,262,409		3,814		(50,268	)		1,215,955
MFS New Discovery Value Fund		2,742,994		10,127		(91,479	)		2,661,642
MFS Research Fund		3,590,283		39,262		(49,932	)		3,579,613
MFS Research International Fund		6,294,780		211,567		(14,644	)		6,491,703
MFS Value Fund		5,710,124		106,026		(59,109	)		5,757,041

Underlying Affiliated Funds	Realized Gain (Loss)		Capital Gain Distributions		Dividend Income			Ending Value
MFS Commodity Strategy Fund		$44,736		$—		$—			$68,376,898
MFS Emerging Markets Equity Fund		570		—		—			26,516,632
MFS Global Real Estate Fund		—		—		—			65,520,208
MFS Growth Fund		1,021,065		—		—			173,503,890
MFS Institutional Money Market Portfolio		—		—		—			67
MFS International Growth Fund		130,985		—		—			105,515,328
MFS International New Discovery Fund		3,278		—		—			52,778,733
MFS International Value Fund		72,819		—		—			105,168,081
MFS Mid Cap Growth Fund		1,920,123		—		—			133,624,720
MFS Mid Cap Value Fund		1,506,752		—		—			132,410,673
MFS New Discovery Fund		800,814		—		—			33,609,000

Supplemental Information (unaudited) – continued


Underlying Affiliated Funds - continued	Realized Gain (Loss)		Capital Gain Distributions		Dividend Income		Ending Value
MFS New Discovery Value Fund		$257,518		$—		$—		$33,243,902
MFS Research Fund		985,527		—		—		119,093,720
MFS Research International Fund		96,224		—		—		105,230,504
MFS Value Fund		827,073		—		896,355		171,674,960

		$7,667,484		$—		$896,355		$1,326,267,316

QUARTERLY REPORT

August 31, 2013

LOGO

MFS® CONSERVATIVE ALLOCATION FUND

LOGO

PORTFOLIO OF INVESTMENTS

8/31/13 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.


Issuer	Shares/Par		Value ($)
Underlying Affiliated Funds - 99.9%
MFS Absolute Return Fund - Class R5		5,075,308	$	48,976,724
MFS Commodity Strategy Fund - Class R5 (v)		2,809,293		24,609,410
MFS Emerging Markets Debt Fund - Class R5		5,026,940		72,186,858
MFS Global Bond Fund - Class R5		12,959,298		120,391,879
MFS Global Real Estate Fund - Class R5 (v)		1,674,131		23,789,408
MFS Government Securities Fund - Class R5		24,523,111		244,495,419
MFS Growth Fund - Class R5 (a)		2,515,923		148,816,866
MFS High Income Fund - Class R5		34,891,390		122,817,693
MFS Inflation-Adjusted Bond Fund - Class R5		23,349,630		243,303,142
MFS International Growth Fund - Class R5		1,877,327		48,491,359
MFS International Value Fund - Class R5		1,570,935		48,620,447
MFS Limited Maturity Fund - Class R5		40,607,664		244,864,215
MFS Mid Cap Growth Fund - Class R5 (a)		8,127,326		99,722,284
MFS Mid Cap Value Fund - Class R5		5,369,465		98,690,759
MFS New Discovery Fund - Class R5 (a)		911,669		25,198,522
MFS New Discovery Value Fund - Class R5		1,988,228		24,832,963
MFS Research Bond Fund - Class R5		39,123,126		415,878,834
MFS Research Fund - Class R5		4,416,716		146,944,154
MFS Research International Fund - Class R5		6,003,911		97,323,403
MFS Value Fund - Class R5		4,905,793		146,290,755
Total Underlying Affiliated Funds			$	2,446,245,094

Money Market Funds - 0.0%
MFS Institutional Money Market Portfolio, 0.09%, at Net Asset Value (v)		9	$	9
Total Investments			$	2,446,245,103

Other Assets, Less Liabilities - 0.1%				1,470,679
Net Assets - 100.0%			$	2,447,715,782

(a)	Non-income producing security.

(v)	Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

Supplemental Information

8/31/13 (unaudited)

(1) Investment Valuations

Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as provided by a third-party pricing service on the market or exchange on which they are primarily traded. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation as provided by a third-party pricing service on the market or exchange on which such securities are primarily traded. Equity securities held short, for which there were no sales reported for that day, are generally valued at the last quoted daily ask quotation as provided by a third-party pricing service on the market or exchange on which such securities are primarily traded. Debt instruments and floating rate loans (other than short-term instruments), including restricted debt instruments, are generally valued at an evaluated or composite bid as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less generally are valued at amortized cost, which approximates market value. Exchange-traded options are generally valued at the last sale or official closing price as provided by a third-party pricing service on the exchange on which such options are primarily traded. Exchange-traded options for which there were no sales reported that day are generally valued at the last daily bid quotation as provided by a third-party pricing service on the exchange on which such options are primarily traded. Options not traded on an exchange are generally valued at a broker/dealer bid quotation. Foreign currency options are generally valued at valuations provided by a third-party pricing service. Futures contracts are generally valued at last posted settlement price as provided by a third-party pricing service on the market on which they are primarily traded. Futures contracts for which there were no trades that day for a particular position are generally valued at the closing bid quotation as provided by a third-party pricing service on the market on which such futures contracts are primarily traded. Forward foreign currency exchange contracts are generally valued at the mean of bid and asked prices for the time period interpolated from rates provided by a third-party pricing service for proximate time periods. Swap agreements are generally valued at valuations provided by a third-party pricing service, which for cleared swaps includes an evaluation of any trading activity at the clearinghouses. Open-end investment companies are generally valued at net asset value per share. Securities and other assets, including commodity-linked structured notes, generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. Values obtained from third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, and other market data. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Various inputs are used in determining the value of the fund’s assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes unobservable inputs, which may include the adviser’s own assumptions in determining the fair value of investments.

Supplemental Information (unaudited) – continued

The following is a summary of the levels used as of August 31, 2013 in valuing the fund’s assets or liabilities:


Investments at Value	Level 1		Level 2		Level 3		Total
Mutual Funds		$2,446,245,103		$—		$—		$2,446,245,103

For further information regarding security characteristics, see the Portfolio of Investments.

(2) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:


Aggregate cost	$2,142,518,913
Gross unrealized appreciation	329,949,390
Gross unrealized depreciation	(26,223,200	)
Net unrealized appreciation (depreciation)	$303,726,190

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

(3) Transactions in Underlying Affiliated Funds – Affiliated Issuers


Underlying Affiliated Funds	Beginning Shares/Par Amount		Acquisitions Shares/Par Amount		Dispositions Shares/Par Amount			Ending Shares/Par Amount
MFS Absolute Return Fund		4,977,526		111,073		(13,291	)		5,075,308
MFS Commodity Strategy Fund		2,705,567		123,827		(20,101	)		2,809,293
MFS Emerging Markets Debt Fund		4,560,787		466,153		—			5,026,940
MFS Global Bond Fund		11,959,691		999,607		—			12,959,298
MFS Global Real Estate Fund		1,513,487		165,154		(4,510	)		1,674,131
MFS Government Securities Fund		23,623,837		914,895		(15,621	)		24,523,111
MFS Growth Fund		2,575,177		537		(59,791	)		2,515,923
MFS High Income Fund		33,374,460		1,525,194		(8,264	)		34,891,390
MFS Inflation-Adjusted Bond Fund		21,763,313		1,586,317		—			23,349,630
MFS Institutional Money Market Portfolio		26		13,825,803		(13,825,820	)		9
MFS International Growth Fund		1,815,157		69,824		(7,654	)		1,877,327
MFS International Value Fund		1,565,246		25,118		(19,429	)		1,570,935
MFS Limited Maturity Fund		39,902,912		825,614		(120,862	)		40,607,664
MFS Mid Cap Growth Fund		8,398,151		—		(270,825	)		8,127,326
MFS Mid Cap Value Fund		5,537,758		—		(168,293	)		5,369,465
MFS New Discovery Fund		960,576		—		(48,907	)		911,669
MFS New Discovery Value Fund		2,079,945		—		(91,717	)		1,988,228
MFS Research Bond Fund		37,464,728		1,660,182		(1,784	)		39,123,126
MFS Research Fund		4,517,370		2,262		(102,916	)		4,416,716
MFS Research International Fund		5,887,856		181,195		(65,140	)		6,003,911
MFS Value Fund		4,966,507		35,100		(95,814	)		4,905,793

Supplemental Information (unaudited) – continued


Underlying Affiliated Funds	Realized Gain (Loss)			Capital Gain Distributions		Dividend Income		Ending Value
MFS Absolute Return Fund		$(5,848	)		$—		$143,033		$48,976,724
MFS Commodity Strategy Fund		(63,826	)		—		—		24,609,410
MFS Emerging Markets Debt Fund		—			—		908,661		72,186,858
MFS Global Bond Fund		—			—		1,149,173		120,391,879
MFS Global Real Estate Fund		(4,307	)		—		—		23,789,408
MFS Government Securities Fund		(7,874	)		—		1,451,940		244,495,419
MFS Growth Fund		288,281			—		—		148,816,866
MFS High Income Fund		(1,300	)		—		1,862,141		122,817,693
MFS Inflation-Adjusted Bond Fund		—			—		773,604		243,303,142
MFS Institutional Money Market Portfolio		—			—		62		9
MFS International Growth Fund		257			—		—		48,491,359
MFS International Value Fund		19,321			—		—		48,620,447
MFS Limited Maturity Fund		(40,820	)		—		1,220,328		244,864,215
MFS Mid Cap Growth Fund		365,313			—		—		99,722,284
MFS Mid Cap Value Fund		567,195			—		—		98,690,759
MFS New Discovery Fund		204,320			—		—		25,198,522
MFS New Discovery Value Fund		112,750			—		—		24,832,963
MFS Research Bond Fund		(816	)		—		3,211,772		415,878,834
MFS Research Fund		385,372			—		—		146,944,154
MFS Research International Fund		23,468			—		—		97,323,403
MFS Value Fund		376,376			—		779,247		146,290,755

		$2,217,862			$—		$11,499,961		$2,446,245,103

QUARTERLY REPORT

August 31, 2013

LOGO

MFS® EMERGING MARKETS EQUITY FUND

LOGO

PORTFOLIO OF INVESTMENTS

8/31/13 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.


Issuer	Shares/Par		Value ($)

Common Stocks - 97.7%
Airlines - 0.3%
Copa Holdings S.A., “A”		19,027	$	2,488,351

Alcoholic Beverages - 2.2%
Companhia de Bebidas das Americas, ADR		199,730	$	6,946,609
SABMiller PLC		185,280		8,826,330

			$	15,772,939
Apparel Manufacturers - 4.4%
Belle International Holdings Ltd.		4,396,000	$	6,039,535
Cia.Hering S.A.		335,600		4,488,357
Li & Fung Ltd.		8,356,000		12,284,353
Stella International Holdings		3,872,000		9,487,198

			$	32,299,443
Automotive - 6.2%
Exide Industries Ltd.		2,999,029	$	5,685,309
Ford Otomotiv Sanayi A.S.		449,152		5,602,315
Geely Automobile Holdings Ltd.		11,430,000		5,981,443
Guangzhou Automobile Group Co. Ltd., “H”		7,040,000		7,135,575
Kia Motors Corp.		343,070		20,649,869

			$	45,054,511
Brokerage & Asset Managers - 1.1%
BM&F Bovespa S.A.		1,233,200	$	6,042,083
Bolsa Mexicana de Valores S.A. de C.V.		961,000		2,264,942

			$	8,307,025
Business Services - 2.5%
Cognizant Technology Solutions Corp., “A” (a)		179,740	$	13,174,942
LPS Brasil - Consultoria de Imoveis S.A.		508,500		3,241,596
Multiplus S.A.		164,500		1,796,714

			$	18,213,252
Cable TV - 3.2%
Astro Malaysia Holdings Berhad		9,080,700	$	8,182,928
Dish TV India Ltd. (a)		1,995,579		1,270,873
Naspers Ltd.		172,776		14,256,478

			$	23,710,279
Computer Software - Systems - 2.6%
Asustek Computer, Inc.		652,000	$	5,169,534
Hon Hai Precision Industry Co. Ltd.		5,054,309		13,643,857

			$	18,813,391
Conglomerates - 0.7%
First Pacific Co. Ltd.		5,281,250	$	5,468,916

Construction - 1.1%
Anhui Conch Cement Co. Ltd.		2,565,500	$	8,241,181

Consumer Products - 1.5%
Dabur India Ltd.		3,364,124	$	8,290,646
Kimberly-Clark de Mexico S.A. de C.V., “A”		837,910		2,374,319

			$	10,664,965

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Common Stocks - continued
Consumer Services - 2.0%
Abril Educacao S.A., IEU		186,600	$	2,580,859
Anhanguera Educacional Participacoes S.A.		638,000		3,703,472
Estacio Participacoes S.A.		534,800		3,935,995
Kroton Educacional S.A.		353,544		4,741,679

			$	14,962,005
Electronics - 10.9%
Samsung Electronics Co. Ltd.		23,988	$	29,442,974
Seoul Semiconductor Co. Ltd.		210,318		7,040,462
Siliconware Precision Industries Co. Ltd.		11,446,000		12,796,036
Taiwan Semiconductor Manufacturing Co. Ltd.		9,131,695		30,304,756

			$	79,584,228
Energy - Independent - 3.2%
China Shenhua Energy Co. Ltd.		2,784,000	$	8,652,374
INPEX Corp.		1,004		4,534,051
Reliance Industries Ltd.		795,079		10,275,136

			$	23,461,561
Energy - Integrated - 3.4%
OAO Gazprom, ADR		1,066,520	$	8,382,847
OAO NOVATEK, GDR		36,250		4,342,750
Petroleo Brasileiro S.A., ADR		882,370		11,929,642

			$	24,655,239
Engineering - Construction - 0.7%
Mills Estruturas e Servicos de Engenharia S.A.		188,300	$	2,336,042
Promotora y Operadora de Infraestructura S.A.B. de C.V. (a)		312,600		3,049,962

			$	5,386,004
Food & Beverages - 0.9%
Arca Continental S.A.B de C.V.		379,492	$	2,402,607
M. Dias Branco S.A. Industria e Comercio de Alimentos		114,800		4,385,683

			$	6,788,290
Food & Drug Stores - 4.1%
Dairy Farm International Holdings Ltd.		444,600	$	4,534,920
E-Mart Co. Ltd.		36,286		6,689,190
Magnit OJSC		21,003		4,669,440
O’Key Group S.A., GDR		708,266		9,143,714
Wumart Stores, Inc., “H”		2,806,000		5,297,422

			$	30,334,686
Gaming & Lodging - 1.0%
Minor International PLC		4,032,400	$	2,680,751
Shangri-La Asia Ltd.		2,806,000		4,320,569

			$	7,001,320
General Merchandise - 2.1%
Clicks Group Ltd.		591,093	$	3,152,228
Lojas Renner S.A.		67,900		1,633,220
Mr. Price Group Ltd.		268,565		3,270,895
PT Mitra Adiperkasa Tbk		3,047,000		1,325,389
Woolworths Ltd.		930,504		6,173,192

			$	15,554,924

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Common Stocks - continued
Health Maintenance Organizations - 0.3%
OdontoPrev S.A.		532,900	$	1,967,706

Insurance - 1.9%
Brasil Insurance Participacoes e Administracao S.A.		607,400	$	4,862,357
China Pacific Insurance Co. Ltd.		2,777,000		9,242,673

			$	14,105,030
Internet - 1.4%
51job, Inc., ADR (a)		40,950	$	2,581,897
NHN Corp.		18,909		7,561,317

			$	10,143,214
Machinery & Tools - 2.0%
Glory Ltd.		240,800	$	5,023,232
Sinotruk Hong Kong Ltd.		5,417,000		2,651,326
Thermax Ltd.		284,139		2,324,031
TK Corp. (a)		213,227		4,501,880

			$	14,500,469
Major Banks - 1.6%
Standard Chartered PLC		505,681	$	11,329,455

Medical & Health Technology & Services - 0.4%
Fleury S.A.		414,200	$	3,202,913

Medical Equipment - 0.7%
Top Glove Corp.		2,560,800	$	4,786,761

Metals & Mining - 5.2%
Gerdau S.A., ADR		880,540	$	6,322,277
Grupo Mexico S.A.B. de C.V., “B”		768,406		2,196,925
Iluka Resources Ltd.		1,051,055		9,954,282
Steel Authority of India Ltd.		3,992,524		2,794,827
Usinas Siderurgicas de Minas Gerais S.A., IPS (a)		1,055,800		4,562,249
Vale S.A., ADR		866,660		12,488,571

			$	38,319,131
Network & Telecom - 1.0%
VTech Holdings Ltd.		508,300	$	7,472,638

Oil Services - 1.5%
Global Ports Investments PLC, GDR		102,310	$	1,074,255
Lamprell PLC (a)		1,802,560		4,134,273
Tenaris S.A., ADR		126,590		5,597,810

			$	10,806,338
Other Banks & Diversified Financials - 14.2%
Banco Santander S.A., IEU		602,900	$	3,446,659
Bangkok Bank Public Co. Ltd.		2,249,300		12,549,478
Bank Negara Indonesia PT		431,500		151,233
China Construction Bank		18,047,490		13,158,994
CIMB Group Holdings Berhad		802,400		1,778,361
Compartamos S.A.B. de C.V.		1,649,820		2,893,143
Credicorp Ltd.		23,701		2,873,509
Grupo Financiero Banorte S.A. de C.V.		336,300		2,101,466

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Common Stocks - continued
Other Banks & Diversified Financials - continued
Grupo Financiero Santander Mexico S.A.B. de C.V., ADR		150,310	$	2,050,228
Hana Financial Group, Inc.		263,530		8,276,982
Housing Development Finance Corp. Ltd.		787,663		8,539,431
ICICI Bank Ltd.		578,193		7,006,311
Itau Unibanco Holding S.A., ADR		425,594		5,179,479
Kasikornbank Co. Ltd.		136,900		670,294
Komercni Banka A.S.		67,623		14,583,426
Sberbank of Russia		4,262,840		11,424,411
Turkiye Garanti Bankasi A.S.		2,137,015		7,337,160

			$	104,020,565
Pharmaceuticals - 0.4%
Genomma Lab Internacional S.A., “B” (a)		1,298,000	$	2,782,331

Railroad & Shipping - 0.7%
All America Latina Logistica S.A.		651,600	$	2,520,702
CCR S.A.		317,040		2,305,431

			$	4,826,133
Real Estate - 2.5%
Brasil Brokers Participacoes		1,287,700	$	2,833,431
Concentradora Fibra Hotelera Mexicana S.A. de C.V., REIT		939,000		1,686,700
Hang Lung Properties Ltd.		2,411,000		7,495,079
Macquarie Mexico Real Estate S.A. de C.V., REIT		1,851,000		3,370,618
Multiplan Empreendimentos Imobiliarios S.A.		149,469		3,003,225

			$	18,389,053
Restaurants - 0.7%
Ajisen China Holdings Ltd.		4,529,000	$	4,853,977

Specialty Chemicals - 0.2%
Chugoku Marine Paints Ltd.		255,000	$	1,273,063

Telecommunications - Wireless - 4.5%
America Movil S.A.B. de C.V., “L”, ADR		354,220	$	6,836,446
China Mobile Ltd.		417,500		4,499,568
Mobile TeleSystems OJSC, ADR		405,505		8,580,486
MTN Group Ltd.		279,138		5,100,041
TIM Participacoes S.A., ADR		205,749		4,057,370
Turkcell Iletisim Hizmetleri A.S. (a)		782,560		4,091,768

			$	33,165,679
Telephone Services - 2.5%
China Unicom (Hong Kong) Ltd.		8,678,000	$	13,109,730
PT XL Axiata Tbk		13,153,500		5,390,285

			$	18,500,015
Utilities - Electric Power - 1.6%
Alupar Investimento S.A., IEU (a)		368,800	$	2,640,082
CESC Ltd.		748,255		3,479,890
Energias do Brasil S.A.		777,000		3,484,524
Tractebel Energia S.A.		164,500		2,357,929

			$	11,962,425

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Common Stocks - continued
Utilities - Water - 0.3%
Aguas Andinas S.A.		2,784,015	$	1,904,806
Total Common Stocks			$	715,074,212

Money Market Funds - 2.0%
MFS Institutional Money Market Portfolio, 0.09%, at Net Asset Value (v)		14,826,777	$	14,826,777
Total Investments			$	729,900,989

Other Assets, Less Liabilities - 0.3%				2,132,581
Net Assets - 100.0%			$	732,033,570

(a)	Non-income producing security.

(v)	Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:


ADR		American Depositary Receipt
GDR		Global Depositary Receipt
IEU		International Equity Unit
IPS		International Preference Stock
PLC		Public Limited Company
REIT		Real Estate Investment Trust

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

Supplemental Information

8/31/13 (unaudited)

(1) Investment Valuations


Investments at Value	Level 1		Level 2		Level 3		Total
Equity Securities:
Brazil		$122,996,856		$—		$—		$122,996,856
China		11,234,271		80,211,424		—		91,445,695
South Korea		—		84,162,674		—		84,162,674
Taiwan		—		61,914,183		—		61,914,183
Hong Kong		43,568,595		7,495,079		—		51,063,674
India		21,079,303		28,587,151		—		49,666,454
Russia		42,948,463		4,669,440		—		47,617,903
Mexico		34,009,686		—		—		34,009,686
South Africa		31,952,834		—		—		31,952,834
Other Countries		77,727,923		62,516,330		—		140,244,253
Mutual Funds		14,826,777		—		—		14,826,777
Total Investments		$400,344,708		$329,556,281		$—		$729,900,989

For further information regarding security characteristics, see the Portfolio of Investments.

Supplemental Information (unaudited) – continued

Of the level 2 investments presented above, equity investments amounting to $38,543,620 would have been considered level 1 investments at the beginning of the period. Of the level 1 investments presented above, equity investments amounting to $137,596,578 would have been considered level 2 investments at the beginning of the period. The primary reason for changes in the classifications between levels 1 and 2 occurs when foreign equity securities are fair valued using other observable market-based inputs in place of the closing exchange price due to events occurring after the close of the exchange or market on which the investment is principally traded. The fund’s foreign equity securities may often be valued at fair value. The fund’s policy is to recognize transfers between the levels as of the end of the period.

(2) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:


Aggregate cost	$722,524,134
Gross unrealized appreciation	82,508,511
Gross unrealized depreciation	(75,131,656	)
Net unrealized appreciation (depreciation)	$7,376,855

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

(3) Transactions in Underlying Affiliated Funds – Affiliated Issuers


Underlying Affiliated Fund	Beginning Shares/Par Amount		Acquisitions Shares/Par Amount		Dispositions Shares/Par Amount			Ending Shares/Par Amount
MFS Institutional Money Market Portfolio		13,349,769		51,707,441		(50,230,433	)		14,826,777

Underlying Affiliated Fund	Realized Gain (Loss)		Capital Gain Distributions		Dividend Income			Ending Value
MFS Institutional Money Market Portfolio		$—		$—		$2,878			$14,826,777

(4) Issuer Country Weightings

Issuer country weighting percentages of portfolio holdings based on net assets, as of August 31, 2013, are as follows:


Brazil			16.8%
China			12.5%
South Korea			11.5%
Taiwan			8.5%
Hong Kong			7.0%
India			6.8%
Russia			6.5%
Mexico			4.6%
South Africa			4.4%
Other Countries			21.4%

QUARTERLY REPORT

August 31, 2013

LOGO

MFS® GROWTH

ALLOCATION FUND

LOGO

PORTFOLIO OF INVESTMENTS

8/31/13 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.


Issuer	Shares/Par		Value ($)
Underlying Affiliated Funds - 100.0%
MFS Absolute Return Fund - Class R5		4,177,421	$	40,312,117
MFS Commodity Strategy Fund - Class R5 (v)		18,951,341		166,013,749
MFS Emerging Markets Debt Fund - Class R5		8,309,367		119,322,514
MFS Emerging Markets Equity Fund - Class R5		1,340,942		39,799,151
MFS Global Bond Fund - Class R5		17,124,937		159,090,660
MFS Global Real Estate Fund - Class R5 (v)		8,305,405		118,019,806
MFS Growth Fund - Class R5 (a)		7,390,352		437,139,316
MFS High Income Fund - Class R5		57,265,571		201,574,811
MFS Inflation-Adjusted Bond Fund - Class R5		19,282,463		200,923,263
MFS International Growth Fund - Class R5		7,597,996		196,256,240
MFS International New Discovery Fund - Class R5		2,979,307		78,653,698
MFS International Value Fund - Class R5		6,318,761		195,565,656
MFS Mid Cap Growth Fund - Class R5 (a)		29,196,675		358,243,195
MFS Mid Cap Value Fund - Class R5		19,320,725		355,114,930
MFS New Discovery Fund - Class R5 (a)		2,922,216		80,770,040
MFS New Discovery Value Fund - Class R5		6,351,088		79,325,090
MFS Research Bond Fund - Class R5		11,366,264		120,823,388
MFS Research Fund - Class R5		9,505,918		316,261,893
MFS Research International Fund - Class R5		16,896,457		273,891,569
MFS Value Fund - Class R5		14,563,345		434,278,954
Total Underlying Affiliated Funds			$	3,971,380,040

Money Market Funds - 0.0%
MFS Institutional Money Market Portfolio, 0.09%, at Net Asset Value (v)		21	$	21
Total Investments			$	3,971,380,061

Other Assets, Less Liabilities - 0.0%				729,962
Net Assets - 100.0%			$	3,972,110,023

(a)	Non-income producing security.

(v)	Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

Supplemental Information

8/31/13 (unaudited)

(1) Investment Valuations

Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as provided by a third-party pricing service on the market or exchange on which they are primarily traded. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation as provided by a third-party pricing service on the market or exchange on which such securities are primarily traded. Equity securities held short, for which there were no sales reported for that day, are generally valued at the last quoted daily ask quotation as provided by a third-party pricing service on the market or exchange on which such securities are primarily traded. Debt instruments and floating rate loans (other than short-term instruments), including restricted debt instruments, are generally valued at an evaluated or composite bid as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less generally are valued at amortized cost, which approximates market value. Exchange-traded options are generally valued at the last sale or official closing price as provided by a third-party pricing service on the exchange on which such options are primarily traded. Exchange-traded options for which there were no sales reported that day are generally valued at the last daily bid quotation as provided by a third-party pricing service on the exchange on which such options are primarily traded. Options not traded on an exchange are generally valued at a broker/dealer bid quotation. Foreign currency options are generally valued at valuations provided by a third-party pricing service. Futures contracts are generally valued at last posted settlement price as provided by a third-party pricing service on the market on which they are primarily traded. Futures contracts for which there were no trades that day for a particular position are generally valued at the closing bid quotation as provided by a third-party pricing service on the market on which such futures contracts are primarily traded. Forward foreign currency exchange contracts are generally valued at the mean of bid and asked prices for the time period interpolated from rates provided by a third-party pricing service for proximate time periods. Swap agreements are generally valued at valuations provided by a third-party pricing service, which for cleared swaps includes an evaluation of any trading activity at the clearinghouses. Open-end investment companies are generally valued at net asset value per share. Securities and other assets, including commodity-linked structured notes, generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. Values obtained from third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, and other market data. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Supplemental Information (unaudited) – continued

The following is a summary of the levels used as of August 31, 2013 in valuing the fund’s assets or liabilities:


Investments at Value	Level 1		Level 2		Level 3		Total
Mutual Funds		$3,971,380,061		$—		$—		$3,971,380,061

For further information regarding security characteristics, see the Portfolio of Investments.

(2) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:


Aggregate cost	$3,060,301,211
Gross unrealized appreciation	944,989,485
Gross unrealized depreciation	(33,910,635	)
Net unrealized appreciation (depreciation)	$911,078,850

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

(3) Transactions in Underlying Affiliated Funds – Affiliated Issuers


Underlying Affiliated Funds	Beginning Shares/Par Amount		Acquisitions Shares/Par Amount		Dispositions Shares/Par Amount			Ending Shares/Par Amount
MFS Absolute Return Fund		3,911,248		275,765		(9,592	)		4,177,421
MFS Commodity Strategy Fund		17,032,065		1,991,726		(72,450	)		18,951,341
MFS Emerging Markets Debt Fund		7,202,273		1,107,780		(686	)		8,309,367
MFS Emerging Markets Equity Fund		1,145,524		196,589		(1,171	)		1,340,942
MFS Global Bond Fund		15,162,203		1,964,586		(1,852	)		17,124,937
MFS Global Real Estate Fund		7,209,541		1,104,586		(8,722	)		8,305,405
MFS Growth Fund		7,295,432		107,351		(12,431	)		7,390,352
MFS High Income Fund		52,481,322		4,853,349		(69,100	)		57,265,571
MFS Inflation-Adjusted Bond Fund		17,211,552		2,089,581		(18,670	)		19,282,463
MFS Institutional Money Market Portfolio		33		24,678,666		(24,678,678	)		21
MFS International Growth Fund		7,121,404		483,609		(7,017	)		7,597,996
MFS International New Discovery Fund		2,829,037		151,449		(1,179	)		2,979,307
MFS International Value Fund		6,160,355		164,858		(6,452	)		6,318,761
MFS Mid Cap Growth Fund		29,237,065		110,567		(150,957	)		29,196,675
MFS Mid Cap Value Fund		19,297,556		156,737		(133,568	)		19,320,725
MFS New Discovery Fund		2,978,273		4,633		(60,690	)		2,922,216
MFS New Discovery Value Fund		6,436,932		19,746		(105,590	)		6,351,088
MFS Research Bond Fund		10,413,310		968,407		(15,453	)		11,366,264
MFS Research Fund		9,319,036		220,162		(33,280	)		9,505,918
MFS Research International Fund		16,195,438		737,442		(36,423	)		16,896,457
MFS Value Fund		14,108,195		488,386		(33,236	)		14,563,345

Supplemental Information (unaudited) – continued


Underlying Affiliated Funds	Realized Gain (Loss)		Capital Gain Distributions		Dividend Income		Ending Value
MFS Absolute Return Fund		$332		$—		$115,938		$40,312,117
MFS Commodity Strategy Fund		30,424		—		—		166,013,749
MFS Emerging Markets Debt Fund		2,181		—		1,461,636		119,322,514
MFS Emerging Markets Equity Fund		17,781		—		—		39,799,151
MFS Global Bond Fund		2,997		—		1,483,067		159,090,660
MFS Global Real Estate Fund		46,820		—		—		118,019,806
MFS Growth Fund		385,379		—		—		437,139,316
MFS High Income Fund		82,440		—		2,983,968		201,574,811
MFS Inflation-Adjusted Bond Fund		21,883		—		623,500		200,923,263
MFS Institutional Money Market Portfolio		—		—		148		21
MFS International Growth Fund		96,422		—		—		196,256,240
MFS International New Discovery Fund		18,750		—		—		78,653,698
MFS International Value Fund		110,150		—		—		195,565,656
MFS Mid Cap Growth Fund		1,097,188		—		—		358,243,195
MFS Mid Cap Value Fund		1,592,725		—		—		355,114,930
MFS New Discovery Fund		1,041,962		—		—		80,770,040
MFS New Discovery Value Fund		447,029		—		—		79,325,090
MFS Research Bond Fund		31,170		—		912,020		120,823,388
MFS Research Fund		672,989		—		—		316,261,893
MFS Research International Fund		285,731		—		—		273,891,569
MFS Value Fund		530,530		—		2,220,392		434,278,954

		$6,514,883		$—		$9,800,669		$3,971,380,061

QUARTERLY REPORT

August 31, 2013

LOGO

MFS® INTERNATIONAL DIVERSIFICATION FUND

LOGO

PORTFOLIO OF INVESTMENTS

8/31/13 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.


Issuer	Shares/Par		Value ($)
Underlying Affiliated Funds - 99.9%
MFS Emerging Markets Equity Fund - Class R5		11,984,795	$	355,708,703
MFS International Growth Fund - Class R5		33,705,391		870,610,262
MFS International New Discovery Fund - Class R5		13,260,980		350,089,873
MFS International Value Fund - Class R5		28,101,197		869,732,062
MFS Research International Fund - Class R5		64,286,465		1,042,083,596
Total Underlying Affiliated Funds			$	3,488,224,496

Money Market Funds - 0.1%
MFS Institutional Money Market Portfolio, 0.09%, at Net Asset Value (v)		1,887,074	$	1,887,074
Total Investments			$	3,490,111,570

Other Assets, Less Liabilities - (0.0)%				(563,099	)
Net Assets - 100.0%			$	3,489,548,471

(v)	Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

Supplemental Information

8/31/13 (unaudited)

(1) Investment Valuations

Supplemental Information (unaudited) – continued


Investments at Value	Level 1		Level 2		Level 3		Total
Mutual Funds		$3,490,111,570		$—		$—		$3,490,111,570

For further information regarding security characteristics, see the Portfolio of Investments.

(2) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:


Aggregate cost	$3,224,482,184
Gross unrealized appreciation	268,304,870
Gross unrealized depreciation	(2,675,484	)
Net unrealized appreciation (depreciation)	$265,629,386

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

(3) Transactions in Underlying Affiliated Funds – Affiliated Issuers


Underlying Affiliated Funds	Beginning Shares/Par Amount		Acquisitions Shares/Par Amount		Dispositions Shares/Par Amount			Ending Shares/Par Amount
MFS Emerging Markets Equity Fund		10,277,198		1,721,299		(13,702	)		11,984,795
MFS Institutional Money Market Portfolio		91,798		83,865,516		(82,070,240	)		1,887,074
MFS International Growth Fund		31,882,003		1,837,320		(13,932	)		33,705,391
MFS International New Discovery Fund		12,672,234		595,944		(7,198	)		13,260,980
MFS International Value Fund		27,552,984		576,908		(28,695	)		28,101,197
MFS Research International Fund		62,119,896		2,199,284		(32,715	)		64,286,465

Underlying Affiliated Funds	Realized Gain (Loss)		Capital Gain Distributions		Dividend Income			Ending Value
MFS Emerging Markets Equity Fund		$177,520		$—		$—			$355,708,703
MFS Institutional Money Market Portfolio		—		—		805			1,887,074
MFS International Growth Fund		148,748		—		—			870,610,262
MFS International New Discovery Fund		100,447		—		—			350,089,873
MFS International Value Fund		356,209		—		—			869,732,062
MFS Research International Fund		186,893		—		—			1,042,083,596

		$969,817		$—		$805			$3,490,111,570

QUARTERLY REPORT

August 31, 2013

LOGO

MFS® INTERNATIONAL GROWTH FUND

LOGO

PORTFOLIO OF INVESTMENTS

8/31/13 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.


Issuer	Shares/Par		Value ($)

Common Stocks - 98.3%
Aerospace - 1.2%
Rolls-Royce Holdings PLC		2,336,408	$	40,262,546

Airlines - 1.4%
Copa Holdings S.A., “A”		345,578	$	45,194,691

Alcoholic Beverages - 7.2%
Carlsberg A.S., “B”		421,360	$	40,872,499
Companhia de Bebidas das Americas, ADR		370,520		12,886,686
Diageo PLC		2,229,442		68,201,054
Heineken N.V. (l)		739,402		50,767,130
Pernod Ricard S.A.		545,304		63,306,376

			$	236,033,745
Apparel Manufacturers - 6.7%
Adidas AG		177,613	$	18,779,377
Cia.Hering S.A.		1,309,400		17,512,083
Compagnie Financiere Richemont S.A.		378,265		35,938,122
Li & Fung Ltd.		32,390,400		47,617,892
LVMH Moet Hennessy Louis Vuitton S.A.		568,443		99,582,517

			$	219,429,991
Automotive - 3.6%
Guangzhou Automobile Group Co. Ltd., “H”		17,736,000	$	17,976,783
Honda Motor Co. Ltd.		2,044,200		73,190,636
Toyota Motor Corp.		431,300		26,092,804

			$	117,260,223
Broadcasting - 1.1%
Publicis Groupe S.A.		494,439	$	36,803,728

Brokerage & Asset Managers - 0.9%
Aberdeen Asset Management PLC		2,231,554	$	12,179,922
BM&F Bovespa S.A.		3,719,800		18,225,219

			$	30,405,141
Business Services - 9.5%
Accenture PLC, “A”		843,090	$	60,913,253
Amadeus IT Holding S.A.		809,274		26,140,461
Brenntag AG		258,151		39,236,304
Capita Group PLC		2,839,756		41,961,353
Compass Group PLC		5,965,420		79,133,896
Experian Group Ltd.		2,067,730		36,209,292
Intertek Group PLC		466,545		23,150,620
LPS Brasil - Consultoria de Imoveis S.A.		1,194,500		7,614,722

			$	314,359,901
Computer Software - 2.7%
Dassault Systems S.A.		112,720	$	14,398,567
OBIC Co. Ltd.		129,850		37,991,336
SAP AG		516,884		38,208,004

			$	90,597,907

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Common Stocks - continued
Computer Software - Systems - 0.9%
NICE Systems Ltd., ADR		766,660	$	29,133,080

Construction - 0.4%
Bellway PLC		568,668	$	11,817,764

Consumer Products - 3.7%
L’Oreal S.A.		207,090	$	34,554,687
Reckitt Benckiser Group PLC		838,728		56,995,228
Uni-Charm Corp.		578,100		29,863,766

			$	121,413,681
Electrical Equipment - 3.6%
Legrand S.A.		254,078	$	12,886,408
Mettler-Toledo International, Inc. (a)		195,221		42,993,521
Prysmian S.p.A.		1,121,937		24,911,174
Schneider Electric S.A.		515,509		39,448,569

			$	120,239,672
Electronics - 3.0%
Samsung Electronics Co. Ltd.		32,049	$	39,337,080
Taiwan Semiconductor Manufacturing Co. Ltd., ADR		3,503,725		58,021,686

			$	97,358,766
Energy - Independent - 0.9%
INPEX Corp.		6,701	$	30,261,626

Energy - Integrated - 2.6%
BG Group PLC		3,401,834	$	64,685,276
Suncor Energy, Inc.		621,088		20,932,900

			$	85,618,176
Food & Beverages - 6.1%
Chr. Hansen Holding A.S.		389,603	$	12,907,961
Groupe Danone		1,258,156		93,684,508
M. Dias Branco S.A. Industria e Comercio de Alimentos		389,000		14,860,894
Nestle S.A.		1,201,756		78,851,313

			$	200,304,676
Food & Drug Stores - 2.1%
Dairy Farm International Holdings Ltd.		1,094,300	$	11,161,860
Lawson, Inc.		497,200		37,328,138
Sundrug Co. Ltd.		438,500		20,339,435

			$	68,829,433
Gaming & Lodging - 0.8%
Sands China Ltd.		4,564,000	$	26,133,803

General Merchandise - 1.2%
Dollarama, Inc.		432,430	$	30,524,229
Lojas Renner S.A.		322,900		7,766,814

			$	38,291,043
Insurance - 1.4%
AIA Group Ltd.		10,365,200	$	45,324,992

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Common Stocks - continued
Internet - 1.4%
NHN Corp.		47,188	$	18,869,347
Yahoo Japan Corp.		57,311		28,256,605

			$	47,125,952
Machinery & Tools - 2.5%
KONE Oyj “B”		216,104	$	17,679,497
Schindler Holding AG		194,362		26,800,628
Weir Group PLC		1,165,680		39,290,392

			$	83,770,517
Major Banks - 2.3%
HSBC Holdings PLC		3,180,256	$	33,316,282
Standard Chartered PLC		1,873,003		41,826,373

			$	75,142,655
Medical & Health Technology & Services - 0.8%
Fresenius Medical Care AG & Co. KGaA		411,018	$	26,718,370

Medical Equipment - 2.4%
Essilor International S.A.		275,797	$	29,776,584
Sonova Holding AG		449,535		49,763,131

			$	79,539,715
Metals & Mining - 1.1%
Rio Tinto Ltd.		712,706	$	36,698,021

Network & Telecom - 1.0%
Ericsson, Inc., “B”		2,902,716	$	34,119,456

Oil Services - 1.4%
Saipem S.p.A.		1,294,832	$	28,818,539
Technip		150,430		17,495,791

			$	46,314,330
Other Banks & Diversified Financials - 6.0%
Banco Santander Chile, ADR		689,697	$	15,352,655
Credicorp Ltd.		304,739		36,946,556
HDFC Bank Ltd.		3,052,439		27,442,845
Itau Unibanco Holding S.A., ADR		2,968,043		36,121,083
Julius Baer Group Ltd.		738,982		32,563,020
Sberbank of Russia		7,063,350		18,929,778
UBS AG		1,503,649		29,121,130

			$	196,477,067
Pharmaceuticals - 4.6%
Bayer AG		392,971	$	43,647,863
Novo Nordisk A/S, “B”		203,068		33,927,116
Roche Holding AG		235,912		58,848,058
Santen Pharmaceutical Co. Ltd.		359,700		16,705,525

			$	153,128,562
Railroad & Shipping - 2.7%
Canadian National Railway Co.		590,890	$	55,384,120
Kuehne & Nagel, Inc. AG		259,110		32,275,618

			$	87,659,738

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Common Stocks - continued
Restaurants - 0.7%
Whitbread PLC		491,189	$	23,444,831

Specialty Chemicals - 5.5%
Akzo Nobel N.V.		355,998	$	20,935,108
Croda International PLC		627,134		25,258,897
L’Air Liquide S.A.		271,884		35,757,473
Linde AG		331,295		63,708,051
Symrise AG		847,734		37,063,083

			$	182,722,612
Specialty Stores - 1.1%
Industria de Diseno Textil S.A.		284,892	$	37,709,229

Telecommunications - Wireless - 0.4%
MTN Group Ltd.		712,581	$	13,019,340

Telephone Services - 1.2%
China Unicom (Hong Kong) Ltd.		26,312,000	$	39,749,160

Tobacco - 2.2%
Japan Tobacco, Inc.		2,158,900	$	72,769,429
Total Common Stocks			$	3,241,183,569

Money Market Funds - 1.1%
MFS Institutional Money Market Portfolio, 0.09%, at Net Asset Value (v)		36,533,801	$	36,533,801

Collateral for Securities Loaned - 1.2%
Navigator Securities Lending Prime Portfolio, 0.16%, at Net Asset Value (j)		38,997,877	$	38,997,877
Total Investments			$	3,316,715,247

Other Assets, Less Liabilities - (0.6)%				(21,302,699	)
Net Assets - 100.0%			$	3,295,412,548

(a)	Non-income producing security.

(j)	The rate quoted is the annualized seven-day yield of the fund at period end.

(l)	A portion of this security is on loan.

(v)	Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:


ADR		American Depositary Receipt
PLC		Public Limited Company

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

Supplemental Information

8/31/13 (unaudited)

(1) Investment Valuations


Investments at Value	Level 1		Level 2		Level 3		Total
Equity Securities:
United Kingdom		$597,733,726		$—		$—		$597,733,726
France		477,695,208		—		—		477,695,208
Japan		42,798,329		330,000,971		—		372,799,300
Switzerland		344,161,020		—		—		344,161,020
Germany		267,361,052		—		—		267,361,052
Hong Kong		58,779,752		71,458,795		—		130,238,547
Brazil		114,987,501		—		—		114,987,501
Canada		106,841,249		—		—		106,841,249
United States		103,906,774		—		—		103,906,774
Other Countries		572,828,842		152,630,350		—		725,459,192
Mutual Funds		75,531,678		—		—		75,531,678
Total Investments		$2,762,625,131		$554,090,116		$—		$3,316,715,247

For further information regarding security characteristics, see the Portfolio of Investments.

Supplemental Information (unaudited) – continued

Of the level 2 investments presented above, equity investments amounting to $44,110,586 would have been considered level 1 investments at the beginning of the period. Of the level 1 investments presented above, equity investments amounting to $2,069,982,619 would have been considered level 2 investments at the beginning of the period. The primary reason for changes in the classifications between levels 1 and 2 occurs when foreign equity securities are fair valued using other observable market-based inputs in place of the closing exchange price due to events occurring after the close of the exchange or market on which the investment is principally traded. The fund’s foreign equity securities may often be valued at fair value. The fund’s policy is to recognize transfers between the levels as of the end of the period.

(2) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:


Aggregate cost	$2,892,913,078
Gross unrealized appreciation	520,080,929
Gross unrealized depreciation	(96,278,760	)
Net unrealized appreciation (depreciation)	$423,802,169

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

(3) Transactions in Underlying Affiliated Funds – Affiliated Issuers


Underlying Affiliated Fund	Beginning Shares/Par Amount		Acquisitions Shares/Par Amount		Dispositions Shares/Par Amount			Ending Shares/Par Amount
MFS Institutional Money Market Portfolio		34,422,630		268,420,291		(266,309,120	)		36,533,801

Underlying Affiliated Fund	Realized Gain (Loss)		Capital Gain Distributions		Dividend Income			Ending Value
MFS Institutional Money Market Portfolio		$—		$—		$9,126			$36,533,801

(4) Issuer Country Weightings

Issuer country weighting percentages of portfolio holdings based on net assets, as of August 31, 2013, are as follows:


United Kingdom			18.2%
France			14.5%
Japan			11.3%
Switzerland			10.5%
Germany			8.1%
United States			4.7%
Hong Kong			4.0%
Brazil			3.5%
Canada			3.2%
Other Countries			22.0%

QUARTERLY REPORT

August 31, 2013

LOGO

MFS® INTERNATIONAL

VALUE FUND

LOGO

PORTFOLIO OF INVESTMENTS

8/31/13 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.


Issuer	Shares/Par		Value ($)

Common Stocks - 94.0%
Aerospace - 1.1%
Cobham PLC		31,006,763	$	136,801,749

Alcoholic Beverages - 2.1%
Heineken N.V. (l)		3,785,701	$	259,925,151

Automotive - 0.7%
USS Co. Ltd.		708,230	$	88,358,192

Broadcasting - 1.6%
Fuji Television Network, Inc.		55,831	$	102,508,470
Nippon Television Holdings, Inc.		5,661,100		99,161,632

			$	201,670,102
Brokerage & Asset Managers - 1.4%
Computershare Ltd.		6,571,643	$	56,123,034
Daiwa Securities Group, Inc.		10,213,000		81,843,936
IG Group Holdings PLC		3,781,142		33,282,741

			$	171,249,711
Business Services - 7.2%
Amadeus IT Holding S.A.		6,388,355	$	206,351,052
Brenntag AG		545,789		82,954,330
Bunzl PLC		8,385,486		176,861,833
Compass Group PLC		19,110,026		253,502,823
Nomura Research, Inc.		5,349,900		166,288,130

			$	885,958,168
Chemicals - 1.3%
Givaudan S.A.		115,289	$	155,255,110

Computer Software - 0.8%
OBIC Co. Ltd.		347,510	$	101,674,003

Computer Software - Systems - 1.8%
Canon, Inc.		4,250,300	$	127,356,382
Nintendo Co. Ltd.		496,100		55,824,315
Venture Corp. Ltd.		5,891,500		35,056,162

			$	218,236,859
Construction - 0.7%
Geberit AG		347,041	$	84,443,100

Consumer Products - 7.0%
Henkel KGaA, IPS		2,740,071	$	265,449,697
Kao Corp.		10,484,900		305,000,772
KOSE Corp.		1,767,400		49,303,984
Reckitt Benckiser Group PLC		3,730,145		253,479,633

			$	873,234,086
Containers - 0.3%
Brambles Ltd.		5,498,194	$	42,820,805

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Common Stocks - continued
Electrical Equipment - 1.7%
Legrand S.A.		2,672,762	$	135,557,990
Spectris PLC		2,116,913		72,861,704

			$	208,419,694
Electronics - 2.9%
ASM International N.V.		976,086	$	30,522,441
Halma PLC		10,519,245		89,088,674
Hirose Electric Co. Ltd.		695,920		91,157,399
Taiwan Semiconductor Manufacturing Co. Ltd., ADR		8,989,282		148,862,510

			$	359,631,024
Energy - Independent - 0.5%
Cairn Energy PLC (a)		15,342,718	$	64,791,281

Energy - Integrated - 3.7%
BP PLC		26,681,081	$	184,493,362
Royal Dutch Shell PLC, “A”		8,588,963		277,852,925

			$	462,346,287
Food & Beverages - 6.2%
Groupe Danone		5,852,689	$	435,801,512
ITO EN Ltd.		1,320,300		29,644,794
Nestle S.A.		4,579,506		300,477,018

			$	765,923,324
Food & Drug Stores - 1.2%
Lawson, Inc.		1,979,100	$	148,584,309

Insurance - 6.9%
Admiral Group PLC		1,822,662	$	35,617,955
Amlin PLC		5,658,698		34,393,143
Catlin Group Ltd.		5,769,974		41,802,594
Delta Lloyd N.V.		3,533,790		67,487,762
Euler Hermes		402,362		45,467,337
Hiscox Ltd.		9,031,048		90,270,453
ING Groep N.V. (a)		10,786,317		117,110,866
Jardine Lloyd Thompson Group PLC		3,781,650		52,948,937
Sony Financial Holdings, Inc.		5,820,300		94,364,914
Swiss Re Ltd.		1,759,195		134,995,457
Zurich Insurance Group AG		551,854		137,362,982

			$	851,822,400
Leisure & Toys - 0.4%
Sankyo Co. Ltd.		714,800	$	33,168,559
Yamaha Corp.		1,506,500		18,902,173

			$	52,070,732
Machinery & Tools - 1.6%
Glory Ltd.		1,870,300	$	39,015,575
Neopost S.A. (l)		1,609,042		112,709,285
Schindler Holding AG		353,207		48,703,808

			$	200,428,668
Major Banks - 3.3%
Bank of Ireland (a)		106,368,080	$	31,068,482
HSBC Holdings PLC		23,258,993		243,660,629

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Common Stocks - continued
Major Banks - continued
Sumitomo Mitsui Financial Group, Inc.		3,013,400	$	133,506,035

			$	408,235,146
Medical & Health Technology & Services - 0.7%
Kobayashi Pharmaceutical Co. Ltd.		1,553,000	$	85,721,383

Medical Equipment - 0.4%
Nihon Kohden Corp.		1,459,300	$	53,685,024

Network & Telecom - 3.1%
Ericsson, Inc., “B”		23,725,807	$	278,880,754
Nokia Oyj (a)(l)		28,395,038		109,807,807

			$	388,688,561
Other Banks & Diversified Financials - 4.4%
Chiba Bank Ltd.		6,369,000	$	43,385,973
DnB NOR A.S.A.		9,268,849		143,882,719
Hachijuni Bank Ltd.		6,249,000		35,038,342
Joyo Bank Ltd.		8,991,000		46,235,759
Julius Baer Group Ltd.		1,510,355		66,553,340
Jyske Bank A.S. (a)		624,380		28,817,113
North Pacific Bank Ltd.		9,365,400		36,379,962
Sydbank A.S. (a)		1,017,464		24,552,172
UniCredit S.p.A.		17,753,207		100,376,960
Unione di Banche Italiane S.c.p.A.		3,341,100		16,117,541

			$	541,339,881
Pharmaceuticals - 10.7%
Bayer AG		2,284,320	$	253,722,761
GlaxoSmithKline PLC		15,167,446		386,774,739
Novartis AG		3,548,260		258,745,167
Roche Holding AG		1,355,872		338,221,174
Santen Pharmaceutical Co. Ltd.		1,984,600		92,170,657

			$	1,329,634,498
Printing & Publishing - 1.3%
Pearson PLC		6,646,270	$	130,909,537
United Business Media Ltd.		3,246,851		34,768,677

			$	165,678,214
Real Estate - 2.6%
Deutsche Annington Immobilien SE (a)		2,350,444	$	58,246,204
Deutsche Wohnen AG		6,464,324		113,373,220
GSW Immobilien AG		1,994,038		86,876,628
TAG Immobilien AG		5,863,470		68,551,677

			$	327,047,729
Specialty Chemicals - 0.8%
Symrise AG		2,235,926	$	97,755,088

Specialty Stores - 0.5%
Esprit Holdings Ltd.		39,712,221	$	67,641,638

Telecommunications - Wireless - 6.8%
KDDI Corp.		9,501,394	$	451,861,433
NTT DoCoMo, Inc.		85,427		136,511,780

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Common Stocks - continued
Telecommunications - Wireless - continued
Vodafone Group PLC		77,613,600	$	248,073,025

			$	836,446,238
Telephone Services - 2.3%
China Unicom (Hong Kong) Ltd.		19,960,000	$	30,153,285
Deutsche Telekom AG		4,962,780		63,570,389
Royal KPN N.V. (a)		3,903,644		11,401,944
TDC A.S.		13,317,559		108,748,956
Telecom Italia S.p.A. - Savings Shares		117,206,270		65,122,340

			$	278,996,914
Tobacco - 4.1%
British American Tobacco PLC		4,584,820	$	231,270,926
Japan Tobacco, Inc.		8,262,300		278,495,000

			$	509,765,926
Trucking - 1.9%
Yamato Holdings Co. Ltd.		10,889,300	$	233,164,722
Total Common Stocks			$	11,657,445,717
Issuer/Expiration Date/Strike Price	Par Amount of Contracts
Put Options Purchased - 0.2%
JPY Currency - December 2013 @ $0.01	JPY	10,021,986,224	$	5,832,796
JPY Currency - January 2014 @ $0.01		9,107,954,777		2,705,063
JPY Currency - April 2014 @ $0.01		59,056,133,104		11,515,946
JPY Currency - June 2014 @ EUR 0.01		13,552,479,260		1,761,822
Total Put Options Purchased			$	21,815,627

Call Options Purchased - 0.0%
EUR Currency - December 2013 @ JPY 125	EUR	80,393,923	$	5,817,385
Issuer	Shares/Par
Money Market Funds - 4.9%
MFS Institutional Money Market Portfolio, 0.09%, at Net Asset Value (v)		606,600,057	$	606,600,057

Collateral for Securities Loaned - 0.7%
Navigator Securities Lending Prime Portfolio, 0.16%, at Net Asset Value (j)		83,714,542	$	83,714,542
Total Investments			$	12,375,393,328

Other Assets, Less Liabilities - 0.2%				22,312,964
Net Assets - 100.0%			$	12,397,706,292

(a)	Non-income producing security.

(j)	The rate quoted is the annualized seven-day yield of the fund at period end.

(l)	A portion of this security is on loan.

(v)	Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:


ADR		American Depositary Receipt
IPS		International Preference Stock
PLC		Public Limited Company

Portfolio of Investments (unaudited) – continued

Abbreviations indicate amounts shown in currencies other than the U.S. dollar. All amounts are stated in U.S. dollars unless otherwise indicated. A list of abbreviations is shown below:


EUR		Euro
JPY		Japanese Yen

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

Supplemental Information

8/31/13 (unaudited)

(1) Investment Valuations

Supplemental Information (unaudited) – continued

The following is a summary of the levels used as of August 31, 2013, in valuing the fund’s assets or liabilities:


Investments at Value	Level 1		Level 2		Level 3		Total
Equity Securities:
Japan		$225,676,692		$3,032,636,918		$—		$3,258,313,610
United Kingdom		3,073,507,340		—		—		3,073,507,340
Switzerland		1,524,757,156		—		—		1,524,757,156
Germany		1,090,499,994		—		—		1,090,499,994
France		729,536,123		—		—		729,536,123
Netherlands		486,448,164		—		—		486,448,164
Sweden		278,880,754		—		—		278,880,754
Spain		206,351,052		—		—		206,351,052
Italy		181,616,841		—		—		181,616,841
Other Countries		595,739,759		231,794,924		—		827,534,683
Purchased Currency Options		—		27,633,012		—		27,633,012
Mutual Funds		690,314,599		—		—		690,314,599
Total Investments		$9,083,328,474		$3,292,064,854		$—		$12,375,393,328

For further information regarding security characteristics, see the Portfolio of Investments.

Of the level 2 investments presented above, equity investments amounting to $35,056,162 would have been considered level 1 investments at the beginning of the period. Of the level 1 investments presented above, equity investments amounting to $7,963,943,580 would have been considered level 2 investments at the beginning of the period. The primary reason for changes in the classifications between levels 1 and 2 occurs when foreign equity securities are fair valued using other observable market-based inputs in place of the closing exchange price due to events occurring after the close of the exchange or market on which the investment is principally traded. The fund’s foreign equity securities may often be valued at fair value. The fund’s policy is to recognize transfers between the levels as of the end of the period.

(2) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:


Aggregate cost	$10,702,066,915
Gross unrealized appreciation	1,819,695,848
Gross unrealized depreciation	(146,369,435	)
Net unrealized appreciation (depreciation)	$1,673,326,413

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

(3) Transactions in Underlying Affiliated Funds – Affiliated Issuers


Underlying Affiliated Fund	Beginning Shares/Par Amount		Acquisitions Shares/Par Amount		Dispositions Shares/Par Amount			Ending Shares/Par Amount
MFS Institutional Money Market Portfolio		521,655,427		996,678,109		(911,733,479	)		606,600,057

Underlying Affiliated Fund	Realized Gain (Loss)		Capital Gain Distributions		Dividend Income			Ending Value
MFS Institutional Money Market Portfolio		$—		$—		$152,407			$606,600,057

Supplemental Information (unaudited) – continued

(4) Issuer Country Weightings

Issuer country weighting percentages of portfolio holdings based on net assets, as of August 31, 2013, are as follows:


Japan			26.3%
United Kingdom			24.9%
Switzerland			12.3%
Germany			8.8%
France			5.9%
United States			5.7%
Netherlands			3.9%
Sweden			2.3%
Spain			1.7%
Other Countries			8.2%

QUARTERLY REPORT

August 31, 2013

LOGO

MFS® MODERATE

ALLOCATION FUND

LOGO

PORTFOLIO OF INVESTMENTS

8/31/13 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.


Issuer	Shares/Par		Value ($)
Underlying Affiliated Funds - 99.9%
MFS Absolute Return Fund - Class R5		5,163,916	$	49,831,786
MFS Commodity Strategy Fund - Class R5 (v)		17,546,203		153,704,739
MFS Emerging Markets Debt Fund - Class R5		10,301,498		147,929,509
MFS Global Bond Fund - Class R5		26,535,012		246,510,263
MFS Global Real Estate Fund - Class R5 (v)		6,875,295		97,697,938
MFS Government Securities Fund - Class R5		50,049,859		498,997,094
MFS Growth Fund - Class R5 (a)		6,674,931		394,822,199
MFS High Income Fund - Class R5		70,920,793		249,641,193
MFS Inflation-Adjusted Bond Fund - Class R5		23,917,482		249,220,159
MFS International Growth Fund - Class R5		5,652,054		145,992,558
MFS International New Discovery Fund - Class R5		1,846,638		48,751,239
MFS International Value Fund - Class R5		4,701,010		145,496,261
MFS Mid Cap Growth Fund - Class R5 (a)		28,217,787		346,232,253
MFS Mid Cap Value Fund - Class R5		18,662,524		343,017,191
MFS New Discovery Fund - Class R5 (a)		2,734,579		75,583,758
MFS New Discovery Value Fund - Class R5		5,934,255		74,118,842
MFS Research Bond Fund - Class R5		56,334,356		598,834,200
MFS Research Fund - Class R5		11,796,145		392,457,755
MFS Research International Fund - Class R5		17,991,981		291,650,009
MFS Value Fund - Class R5		13,143,626		391,942,924
Total Underlying Affiliated Funds			$	4,942,431,870

Money Market Funds - 0.0%
MFS Institutional Money Market Portfolio, 0.09%, at Net Asset Value (v)		63	$	63
Total Investments			$	4,942,431,933

Other Assets, Less Liabilities - 0.1%				2,532,323
Net Assets - 100.0%			$	4,944,964,256

(a)	Non-income producing security.

(v)	Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

Supplemental Information

8/31/13 (unaudited)

(1) Investment Valuations

Supplemental Information (unaudited) – continued


Investments at Value	Level 1		Level 2		Level 3		Total
Mutual Funds		$4,942,431,933		$—		$—		$4,942,431,933

For further information regarding security characteristics, see the Portfolio of Investments.

(2) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:


Aggregate cost	$4,085,162,302
Gross unrealized appreciation	901,436,455
Gross unrealized depreciation	(44,166,824	)
Net unrealized appreciation (depreciation)	$857,269,631

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

(3) Transactions in Underlying Affiliated Funds – Affiliated Issuers


Underlying Affiliated Fund	Beginning Shares/Par Amount			Acquisitions Shares/Par Amount		Dispositions Shares/Par Amount		Ending Shares/Par Amount
MFS Absolute Return Fund		4,845,854			325,984		7,922		5,163,916
MFS Commodity Strategy Fund		15,824,936			1,767,498		46,231		17,546,203
MFS Emerging Markets Debt Fund		8,924,268			1,377,230		—		10,301,498
MFS Global Bond Fund		23,469,681			3,065,331		—		26,535,012
MFS Global Real Estate Fund		5,944,369			932,642		1,716		6,875,295
MFS Government Securities Fund		46,093,230			3,993,302		36,673		50,049,859
MFS Growth Fund		6,616,297			74,123		15,489		6,674,931
MFS High Income Fund		65,027,071			5,904,560		10,838		70,920,793
MFS Inflation-Adjusted Bond Fund		21,319,715			2,601,247		3,480		23,917,482
MFS Institutional Money Market Portfolio		23			39,903,862		39,903,822		63
MFS International Growth Fund		5,293,918			359,748		1,612		5,652,054
MFS International New Discovery Fund		1,752,713			94,213		288		1,846,638
MFS International Value Fund		4,573,539			127,730		259		4,701,010
MFS Mid Cap Growth Fund		28,304,859			45,793		132,865		28,217,787
MFS Mid Cap Value Fund		18,669,120			107,349		113,945		18,662,524
MFS New Discovery Fund		2,779,197			—		44,618		2,734,579
MFS New Discovery Value Fund		6,011,313			1,082		78,140		5,934,255
MFS Research Bond Fund		51,598,869			4,751,028		15,541		56,334,356
MFS Research Fund		11,602,303			230,527		36,685		11,796,145
MFS Research International Fund		17,197,448			817,824		23,291		17,991,981
MFS Value Fund		12,757,612			421,157		35,143		13,143,626

Underlying Affiliated Fund	Realized Gain (Loss)			Capital Gain Distributions		Dividend Income		Ending Value
MFS Absolute Return Fund		$(3,474	)		$—		$143,395		$49,831,786
MFS Commodity Strategy Fund		(149,708	)		—		—		153,704,739
MFS Emerging Markets Debt Fund		—			—		1,815,254		147,929,509
MFS Global Bond Fund		—			—		2,299,838		246,510,263
MFS Global Real Estate Fund		(2,379	)		—		—		97,697,938

Supplemental Information (unaudited) – continued


Underlying Affiliated Fund - continued	Realized Gain (Loss)			Capital Gain Distributions		Dividend Income		Ending Value
MFS Government Securities Fund		$(18,588	)		$—		$2,896,516		$498,997,094
MFS Growth Fund		42,529			—		—		394,822,199
MFS High Income Fund		(3,056	)		—		3,699,867		249,641,193
MFS Inflation-Adjusted Bond Fund		(3,613	)		—		773,474		249,220,159
MFS Institutional Money Market Portfolio		—			—		228		63
MFS International Growth Fund		(1,160	)		—		—		145,992,558
MFS International New Discovery Fund		(114	)		—		—		48,751,239
MFS International Value Fund		(212	)		—		—		145,496,261
MFS Mid Cap Growth Fund		101,404			—		—		346,232,253
MFS Mid Cap Value Fund		157,866			—		—		343,017,191
MFS New Discovery Fund		96,530			—		—		75,583,758
MFS New Discovery Value Fund		42,477			—		—		74,118,842
MFS Research Bond Fund		(5,706	)		—		4,521,025		598,834,200
MFS Research Fund		67,208			—		—		392,457,755
MFS Research International Fund		(79	)		—		—		291,650,009
MFS Value Fund		41,131			—		2,008,171		391,942,924

		$361,057			$—		$18,157,768		$4,942,431,933

QUARTERLY REPORT

August 31, 2013

LOGO

MFS® GLOBAL BOND FUND

LOGO

PORTFOLIO OF INVESTMENTS

8/31/13 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.


Issuer	Shares/Par		Value ($)

Bonds - 93.1%
Asset-Backed & Securitized - 0.5%
Commercial Mortgage Pass-Through Certificates, “A3”, 5.293%, 2049	$	870,221	$	888,789
Commercial Mortgage Pass-Through Certificates, “A4”, 5.306%, 2046		870,221		954,943
JPMorgan Chase Commercial Mortgage Securities Corp., “A3”, FRN, 6.003%, 2049		1,111,221		1,160,909

			$	3,004,641
Automotive - 0.0%
Automotores Gildemeister S.A., 8.25%, 2021	$	306,000	$	238,680

Broadcasting - 0.1%
Grupo Televisa S.A.B., 7.25%, 2043	MXN	11,230,000	$	691,812

Building - 0.3%
CEMEX Espana S.A., 9.25%, 2020	$	796,000	$	831,820
CEMEX S.A.B. de C.V., 6.5%, 2019 (z)		489,000		474,330
Grupo Cementos de Chihuahua S.A.B. de C.V., 8.125%, 2020 (n)		661,000		667,610

			$	1,973,760
Business Services - 0.1%
Rolta LLC, 10.75%, 2018 (n)	$	912,000	$	859,560

Conglomerates - 0.2%
Metalloinvest Finance Ltd., 5.625%, 2020 (n)	$	945,000	$	883,575

Construction - 0.1%
Empresas ICA S.A.B. de C.V., 8.375%, 2017	$	526,000	$	504,960
Empresas ICA Sociedad Controladora S.A. de C.V., 8.9%, 2021		261,000		241,425

			$	746,385
Consumer Products - 0.2%
Falabella S.A., 6.5%, 2023 (n)	CLP	717,500,000	$	1,343,838

Emerging Market Quasi-Sovereign - 2.5%
Banco de Reservas de La Republica Dominicana, 7%, 2023 (n)	$	968,000	$	948,640
Banco do Brasil S.A., FRN, 6.201%, 2049 (n)		680,000		530,400
Banco do Estado Rio Grande do Sul S.A., 7.375%, 2022 (n)		957,000		942,645
Empresa de Telecomunicaciones de Bogota S.A., 7%, 2023 (n)	COP	1,164,000,000		520,901
Gazprombank OJSC, 8.617%, 2015	RUB	81,500,000		2,460,458
Magyar Export-Import Bank, 5.5%, 2018 (n)	$	460,000		457,620
Novatek Finance Ltd., 7.75%, 2017 (n)	RUB	65,200,000		1,928,207
Petroleos Mexicanos, 7.65%, 2021	MXN	13,761,000		1,076,800
RZD Capital PLC, 8.3%, 2019	RUB	79,800,000		2,400,090
Transnet Ltd., 9.25%, 2017	ZAR	8,000,000		804,317
Transnet Ltd., 10.5%, 2020	ZAR	25,000,000		2,625,098

			$	14,695,176
Emerging Market Sovereign - 36.4%
Brazil Notas do Tesouro Nacional, 6%, 2016	BRL	5,890,223	$	2,520,753
Brazil Notas do Tesouro Nacional, 10%, 2017	BRL	46,118,000		18,435,299
Brazil Notas do Tesouro Nacional, 10%, 2021	BRL	13,820,000		5,190,439
Dominican Republic, 5.875%, 2024 (n)	$	450,000		418,500
Federative Republic of Brazil, 10%, 2018	BRL	3,000,000		1,178,380
Federative Republic of Brazil, Capital Appreciation, 0%, 2014	BRL	3,447,000		1,401,076

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Emerging Market Sovereign - continued
Government of Malaysia, 3.172%, 2016	MYR	5,673,000	$	1,713,566
Government of Malaysia, 4.012%, 2017	MYR	2,896,000		892,779
Government of Malaysia, 3.26%, 2018	MYR	5,000,000		1,494,226
Government of Malaysia, 4.378%, 2019	MYR	4,738,000		1,481,800
Government of Malaysia, 4.16%, 2021	MYR	10,202,000		3,128,184
Government of Malaysia, 4.392%, 2026	MYR	3,568,000		1,106,454
Government of Poland, 3.75%, 2018	PLN	6,895,000		2,128,414
Government of Poland, 5.5%, 2019	PLN	7,655,000		2,555,361
Government of Poland, 5.75%, 2021	PLN	3,229,000		1,094,466
Government of Poland, Capital Appreciation, 0%, 2014	PLN	6,978,000		2,137,411
Government of Romania, 5.8%, 2015	RON	660,000		201,930
Government of Thailand, 3.625%, 2015	THB	63,462,000		1,995,589
Islamic Republic of Pakistan, 6.875%, 2017	$	318,000		297,330
Islamic Republic of Pakistan, 7.875%, 2036		453,000		353,340
Kingdom of Thailand, 3.875%, 2019	THB	448,815,000		13,998,817
Kingdom of Thailand, 3.65%, 2021	THB	118,166,000		3,548,185
Oriental Republic of Uruguay, 5%, 2018	UYU	12,579,695		590,916
Republic of Colombia, 7.5%, 2026	COP	4,656,200,000		2,308,443
Republic of Columbia, 11%, 2020	COP	7,470,000,000		4,593,487
Republic of Cote d’Ivoire, 5.75%, 2032	$	643,000		544,943
Republic of Croatia, 5.5%, 2023 (n)		828,000		790,740
Republic of Hungary, 6.75%, 2017	HUF	1,273,870,000		5,822,484
Republic of Hungary, 6.75%, 2017	HUF	1,158,770,000		5,299,701
Republic of Hungary, 5.375%, 2023	$	890,000		834,375
Republic of Hungary, 6%, 2023	HUF	93,140,000		391,013
Republic of Indonesia, 5.25%, 2018	IDR	32,246,000,000		2,651,971
Republic of Indonesia, 7%, 2022	IDR	44,574,000,000		3,725,888
Republic of Indonesia, 5.625%, 2023	IDR	14,519,000,000		1,088,723
Republic of Indonesia, 11%, 2025	IDR	15,000,000,000		1,603,713
Republic of Indonesia, 8.375%, 2026	IDR	32,665,000,000		2,895,468
Republic of Indonesia, 7%, 2027	IDR	21,626,000,000		1,693,157
Republic of Indonesia, 8.25%, 2032	IDR	26,890,000,000		2,316,320
Republic of Nigeria, Capital Appreciation, 0%, 2013	NGN	145,423,000		863,075
Republic of Nigeria, Capital Appreciation, 0%, 2013	NGN	185,788,000		1,089,261
Republic of Peru, 7.84%, 2020	PEN	4,422,000		1,766,218
Republic of Peru, GDN, 6.95%, 2031	PEN	2,160,000		767,350
Republic of Poland, 5.25%, 2017	PLN	12,236,000		4,006,395
Republic of Poland, 5.25%, 2020	PLN	8,749,000		2,879,519
Republic of South Africa, 13.5%, 2015	ZAR	43,216,000		4,752,898
Republic of South Africa, 8%, 2018	ZAR	54,277,000		5,377,760
Republic of South Africa, 7.25%, 2020	ZAR	16,745,000		1,580,087
Republic of South Africa, 6.75%, 2021	ZAR	22,433,000		2,034,712
Republic of South Africa, 5.5%, 2023	ZAR	4,119,826		537,665
Republic of South Africa, 10.5%, 2026	ZAR	23,289,000		2,630,095
Republic of South Africa, 7%, 2031	ZAR	33,613,000		2,702,281
Republic of South Africa, 6.5%, 2041	ZAR	8,674,000		610,837
Republic of Turkey, 7%, 2014	TRY	2,768,010		1,403,862
Republic of Turkey, 9%, 2017	TRY	11,468,000		5,484,390
Republic of Turkey, 6.3%, 2018	TRY	10,203,408		4,384,150
Republic of Turkey, 4.5%, 2015	TRY	5,204,746		2,601,416
Republic of Turkey, 9%, 2016	TRY	5,483,000		2,645,018
Republic of Turkey, 10.5%, 2020	TRY	4,224,000		2,138,157
Republic of Turkey, 8.5%, 2022	TRY	1,583,035		706,591
Republic of Turkey, Capital Appreciation, 0%, 2013	TRY	9,979,000		4,883,215

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Emerging Market Sovereign - continued
Republic of Venezuela, 12.75%, 2022	$	694,000	$	687,060
Russian Federation, 7.4%, 2017	RUB	30,000,000		919,859
Russian Federation, 7.4%, 2017	RUB	237,105,000		7,302,102
Russian Federation, 6.8%, 2019	RUB	46,363,000		1,370,140
Russian Federation, 7.35%, 2016	RUB	88,091,000		2,701,043
Russian Federation, 6.9%, 2016	RUB	55,955,000		1,700,589
Russian Federation, 7.5%, 2018	RUB	415,840,000		12,812,823
Russian Federation, 7.5%, 2019	RUB	92,262,000		2,830,318
Russian Federation, 8.15%, 2027	RUB	86,916,000		2,665,016
Russian Federation, 7.05%, 2028	RUB	28,853,000		797,302
Titulos de Tesoreria, 5%, 2018	COP	5,120,000,000		2,458,655
United Mexican States, 8%, 2015	MXN	19,130,000		1,544,839
United Mexican States, 7.75%, 2017	MXN	38,860,000		3,176,509
United Mexican States, 8%, 2020	MXN	40,780,000		3,398,023
United Mexican States, 8%, 2023	MXN	35,000,000		2,937,168
United Mexican States, 8.5%, 2029	MXN	57,560,000		4,931,265
United Mexican States, 7.75%, 2031	MXN	15,700,000		1,243,879
United Mexican States, 10%, 2036	MXN	32,400,000		3,115,415
United Mexican States, 8.5%, 2038	MXN	9,590,000		802,777

			$	217,663,375
Energy - Integrated - 0.3%
Pacific Rubiales Energy Corp., 7.25%, 2021	$	967,000	$	1,000,845
Pacific Rubiales Energy Corp., 5.125%, 2023 (n)		597,000		528,345

			$	1,529,190
Financial Institutions - 0.1%
TMK Capital S.A., 6.75%, 2020 (n)	$	722,000	$	693,120

Food & Beverages - 1.0%
Ajecorp B.V., 6.5%, 2022 (n)	$	747,000	$	726,458
BRF, S.A., 7.75%, 2018 (n)	BRL	5,198,000		1,775,549
Central American Bottling Corp., 6.75%, 2022 (n)	$	344,000		354,320
Central American Bottling Corp., 6.75%, 2022		311,000		320,330
Corporacion Lindley S.A., 4.625%, 2023 (n)		158,000		144,570
Cosan Luxembourg S.A., 9.5%, 2018 (n)	BRL	4,208,000		1,550,943
Marfrig Holding Europe B.V., 9.875%, 2017 (n)	$	577,000		574,115
Marfrig Overseas Ltd., 9.5%, 2020		120,000		113,700
Minerva Luxembourg S.A., 7.75%, 2023		601,000		582,970

			$	6,142,955
Forest & Paper Products - 0.1%
Fibria Overseas Finance Ltd., 7.5%, 2020	$	101,000	$	107,313
Fibria Overseas Finance Ltd., 6.75%, 2021		422,000		442,045

			$	549,358
Industrial - 0.1%
Hyva Global B.V., 8.625%, 2016	$	829,000	$	729,520

International Market Quasi-Sovereign - 0.2%
Israel Electric Corp. Ltd., 5.625%, 2018 (n)	$	516,000	$	525,804
Israel Electric Corp. Ltd., 6.875%, 2023 (n)		514,000		523,638

			$	1,049,442

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
International Market Sovereign - 34.9%
Federal Republic of Germany, 4.25%, 2018	EUR	1,900,000	$	2,918,441
Federal Republic of Germany, 3.25%, 2021	EUR	6,481,000		9,712,549
Federal Republic of Germany, 6.25%, 2030	EUR	1,719,000		3,429,230
Government of Australia, 5.75%, 2021	AUD	5,445,000		5,512,691
Government of Canada, 4.5%, 2015	CAD	3,424,000		3,436,515
Government of Canada, 3.25%, 2021	CAD	4,270,000		4,302,107
Government of Canada, 5.75%, 2033	CAD	1,108,000		1,476,744
Government of Japan, 1.1%, 2020	JPY	2,770,800,000		29,445,320
Government of Japan, 2.1%, 2024	JPY	1,715,950,000		19,821,744
Government of Japan, 2.2%, 2027	JPY	1,200,900,000		13,935,540
Government of Japan, 2.4%, 2037	JPY	434,950,000		5,029,295
Government of Japan, 2%, 2052	JPY	111,700,000		1,183,745
Kingdom of Belgium, 4.25%, 2021	EUR	4,046,000		6,103,678
Kingdom of Spain, 4%, 2015	EUR	4,651,000		6,358,758
Kingdom of Spain, 5.5%, 2017	EUR	4,388,000		6,327,725
Kingdom of Spain, 4.6%, 2019	EUR	3,524,000		4,887,146
Kingdom of the Netherlands, 3.5%, 2020	EUR	1,340,000		1,982,859
Kingdom of the Netherlands, 5.5%, 2028	EUR	856,000		1,514,515
Republic of Austria, 1.75%, 2023	EUR	791,000		993,539
Republic of Finland, 3.875%, 2017	EUR	1,082,000		1,598,339
Republic of France, 2.5%, 2020	EUR	7,213,000		9,967,006
Republic of France, 6%, 2025	EUR	1,893,000		3,335,811
Republic of France, 4.75%, 2035	EUR	2,323,000		3,735,811
Republic of Ireland, 5.5%, 2017	EUR	4,475,000		6,527,114
Republic of Ireland, 4.5%, 2020	EUR	1,809,000		2,480,283
Republic of Italy, 4.25%, 2015	EUR	2,189,000		3,004,181
Republic of Italy, 5.25%, 2017	EUR	12,491,000		17,885,558
Republic of Italy, 3.75%, 2021	EUR	6,697,000		8,867,907
United Kingdom Treasury, 5%, 2018	GBP	735,000		1,320,568
United Kingdom Treasury, 8%, 2021	GBP	6,242,000		13,642,636
United Kingdom Treasury, 4.25%, 2027	GBP	1,648,000		2,880,218
United Kingdom Treasury, 4.25%, 2036	GBP	2,936,000		5,117,822

			$	208,735,395
Machinery & Tools - 0.1%
Ferreycorp S.A.A., 4.875%, 2020 (n)	$	921,000	$	842,715

Metals & Mining - 0.1%
First Quantum Minerals Ltd., 7.25%, 2019 (n)	$	778,000	$	739,100

Mortgage-Backed - 0.1%
Freddie Mac, 1.426%, 2017	$	613,000	$	607,089
Freddie Mac, FRN, 3.32%, 2023		12,000		11,806

			$	618,895
Network & Telecom - 0.1%
Telefonica Celular del Paraguay S.A., 6.75%, 2022 (n)	$	810,000	$	805,950

Oil Services - 0.3%
Afren PLC, 10.25%, 2019	$	711,000	$	806,985
Qgog Constellation S.A., 6.25%, 2019 (n)		725,000		659,750

			$	1,466,735
Other Banks & Diversified Financials - 1.1%
Akbank T.A.S., 7.5%, 2018 (n)	TRY	3,795,000	$	1,627,080
Banco Santander Brasil S.A., 8%, 2016 (n)	BRL	3,841,000		1,448,857

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Other Banks & Diversified Financials - continued
BBVA Banco Continental S.A., 5%, 2022 (n)	$	216,000	$	203,040
Citigroup, Inc., 6.125%, 2018		232,000		266,169
Halyk Savings Bank of Kazakhstan B.V., 7.25%, 2017		351,000		368,989
Industrial Senior Trust Co., 5.5%, 2022		791,000		711,900
Turkiye Garanti Bankasi, 7.375%, 2018 (n)	TRY	3,857,000		1,640,771

			$	6,266,806
Specialty Chemicals - 0.1%
Yingde Gases Group Co. Ltd., 8.125%, 2018 (n)	$	561,000	$	565,208

Telecommunications - Wireless - 0.4%
America Movil S.A.B de C.V., 6.45%, 2022	MXN	18,750,000	$	1,309,573
Digicel Group Ltd., 8.25%, 2017	$	541,000		562,640
Digicel Group Ltd., 8.25%, 2020 (n)		200,000		212,000

			$	2,084,213
Telephone Services - 0.2%
Brasil Telecom S.A., 9.75%, 2016	BRL	3,819,000	$	1,392,540

Transportation - 0.4%
Far Eastern Shipping Co., 8%, 2018 (n)	$	902,000	$	805,035
Red de Carreteras de Occidente S.A.B. de C.V., 9%, 2028 (n)	MXN	20,160,000		1,320,437

			$	2,125,472
Transportation - Services - 0.1%
Ultrapetrol (Bahamas) Ltd., 8.875%, 2021 (n)	$	381,000	$	406,718

U.S. Government Agencies and Equivalents - 0.2%
Small Business Administration, 2.22%, 2033	$	1,173,000	$	1,103,753

U.S. Treasury Obligations - 12.8%
U.S. Treasury Bonds, 6.875%, 2025	$	6,524,000	$	9,113,213
U.S. Treasury Bonds, 5.25%, 2029		5,220,000		6,471,986
U.S. Treasury Bonds, 4.5%, 2039		8,597,000		9,937,599
U.S. Treasury Notes, 4.125%, 2015 (f)		17,055,000		18,148,260
U.S. Treasury Notes, 4.75%, 2017		6,743,000		7,668,585
U.S. Treasury Notes, 3.5%, 2020		22,991,000		25,044,027

			$	76,383,670
Total Bonds			$	556,331,557
Issuer/Expiration Date/Strike Price	Number of Contracts
Call Options Purchased - 0.0%
U.S. Treasury Note 10 year Futures - September 2013 @ $124		23	$	26,234
Issuer	Shares/Par
Money Market Funds - 5.8%
MFS Institutional Money Market Portfolio, 0.09%, at Net Asset Value (v)		34,959,686	$	34,959,686
Total Investments			$	591,317,477

Other Assets, Less Liabilities - 1.1%				6,526,257
Net Assets - 100.0%			$	597,843,734

Portfolio of Investments (unaudited) – continued

(f)	All or a portion of the security has been segregated as collateral for open futures contracts.

(n)

Securities exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be sold in the ordinary course of business in transactions exempt from registration, normally to qualified institutional buyers. At period end, the aggregate value of these securities was $28,965,759, representing 4.8% of net assets.

(v)	Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

(z)

Restricted securities are not registered under the Securities Act of 1933 and are subject to legal restrictions on resale. These securities generally may be resold in transactions exempt from registration or to the public if the securities are subsequently registered. Disposal of these securities may involve time-consuming negotiations and prompt sale at an acceptable price may be difficult. The fund holds the following restricted securities:


Restricted Securities	Acquisition Date	Cost		Value
CEMEX S.A.B. de C.V., 6.5%, 2019	8/05/13		$489,000		$474,330
% of Net assets					0.1%

The following abbreviations are used in this report and are defined:


FRN		Floating Rate Note. Interest rate resets periodically and may not be the rate reported at period end.
PLC		Public Limited Company

Abbreviations indicate amounts shown in currencies other than the U.S. dollar. All amounts are stated in U.S. dollars unless otherwise indicated. A list of abbreviations is shown below:


AUD		Australian Dollar
BRL		Brazilian Real
CAD		Canadian Dollar
CLP		Chilean Peso
CNY		Chinese Yuan Renminbi
COP		Colombian Peso
DKK		Danish Krone
EUR		Euro
GBP		British Pound
HUF		Hungarian Forint
IDR		Indonesian Rupiah
INR		Indian Rupee
JPY		Japanese Yen
KRW		Korean Won
MXN		Mexican Peso
MYR		Malaysian Ringgit
NGN		Nigerian Naira
NOK		Norwegian Krone
PEN		Peruvian Nuevo Sol
PHP		Philippine Peso
PLN		Polish Zloty
RON		Romanian New Leu
RUB		Russian Ruble
SEK		Swedish Krona
SGD		Singapore Dollar
THB		Thailand Baht
TRY		Turkish Lira
UYU		Uruguayan Peso
ZAR		South African Rand

Portfolio of Investments (unaudited) – continued

Derivative Contracts at 8/31/13

Forward Foreign Currency Exchange Contracts at 8/31/13


Type	Currency		Counterparty	Contracts to Deliver/Receive	Settlement Date Range	In Exchange For		Contracts at Value		Net Unrealized Appreciation (Depreciation)
Asset Derivatives
SELL		AUD	Barclays Bank PLC	219,000	10/18/13	$	195,345	$	194,348	$	997
SELL		AUD	Goldman Sachs International	1,151,900	10/18/13		1,042,402		1,022,236		20,166
SELL		AUD	Westpac Banking Corp.	2,710,011	10/18/13		2,479,768		2,404,957		74,811
BUY		BRL	UBS AG	1,091,000	9/04/13		451,396		457,260		5,864
SELL		BRL	Deutsche Bank AG	971,000	9/04/13		409,273		406,966		2,307
SELL		BRL	Goldman Sachs International	3,196,000	9/03/13-10/02/13		1,347,189		1,337,249		9,940
SELL		BRL	JPMorgan Chase Bank N.A.	59,150,438	9/03/13-10/02/13		25,251,430		24,712,822		538,608
SELL		BRL	UBS AG	1,008,000	9/04/13		437,653		422,473		15,180
SELL		CAD	Citibank N.A.	147,000	10/18/13		139,792		139,409		383
SELL		CAD	Deutsche Bank AG	734,000	10/18/13		704,946		696,096		8,850
SELL		CAD	Goldman Sachs International	1,889,930	10/18/13		1,810,537		1,792,333		18,204
BUY		CLP	Barclays Bank PLC	845,066,000	9/12/13		1,642,500		1,652,991		10,491
BUY		CNY	JPMorgan Chase Bank N.A.	9,298,000	9/13/13		1,490,303		1,518,589		28,286
SELL		COP	Deutsche Bank AG	8,509,122,087	9/23/13		4,409,174		4,394,340		14,834
BUY		DKK	Goldman Sachs International	9,740,522	10/18/13		1,703,570		1,726,466		22,896
BUY		EUR	Citibank N.A.	908,000	10/18/13		1,193,268		1,200,242		6,974
BUY		EUR	Credit Suisse Group	2,263,106	10/18/13		2,914,734		2,991,491		76,757
BUY		EUR	Deutsche Bank AG	475,000	10/18/13		627,736		627,880		144
BUY		EUR	Goldman Sachs International	2,924,630	10/18/13		3,805,807		3,865,928		60,121
BUY		EUR	UBS AG	700,000	10/18/13		921,696		925,296		3,600
SELL		EUR	Barclays Bank PLC	238,495	10/18/13		318,668		315,255		3,413
SELL		EUR	Citibank N.A.	6,398,874	10/18/13		8,585,259		8,458,365		126,894
SELL		EUR	Credit Suisse Group	260,000	10/18/13		344,463		343,682		781
SELL		EUR	Goldman Sachs International	4,773,978	10/18/13		6,389,058		6,310,492		78,566
BUY		GBP	Barclays Bank PLC	246,000	10/18/13		373,478		381,096		7,618
BUY		GBP	Citibank N.A.	89,000	10/18/13		134,470		137,876		3,406
BUY		GBP	Credit Suisse Group	552,000	10/18/13		846,114		855,142		9,028
BUY		GBP	Goldman Sachs International	496,000	10/18/13		754,218		768,388		14,170
SELL		GBP	Goldman Sachs International	888,000	10/18/13		1,379,942		1,375,663		4,279
SELL		HUF	Barclays Bank PLC	4,991,513	10/21/13		22,154		21,809		345
SELL		HUF	Goldman Sachs International	53,008,000	10/21/13		234,637		231,598		3,039
SELL		INR	Deutsche Bank AG	86,233,000	10/28/13		1,344,529		1,285,725		58,804
BUY		JPY	Barclays Bank PLC	101,936,000	10/18/13		1,033,475		1,038,422		4,947
BUY		JPY	Citibank N.A.	32,133,000	10/18/13		323,319		327,339		4,020
BUY		JPY	Credit Suisse Group	59,342,000	10/18/13		590,976		604,517		13,541
BUY		JPY	Deutsche Bank AG	39,081,000	10/18/13		391,662		398,118		6,456
BUY		JPY	Goldman Sachs International	54,416,000	10/18/13		547,743		554,336		6,593
BUY		JPY	Merrill Lynch International Bank	1,163,858,354	10/18/13		11,738,123		11,856,226		118,103
BUY		JPY	UBS AG	148,737,000	10/18/13		1,490,425		1,515,184		24,759
SELL		JPY	Goldman Sachs International	813,011,184	10/18/13		8,382,551		8,282,146		100,405
BUY		KRW	Barclays Bank PLC	990,854,000	10/28/13		888,021		889,544		1,523
BUY		KRW	Deutsche Bank AG	638,855,000	10/28/13		571,887		573,535		1,648
BUY		KRW	JPMorgan Chase Bank N.A.	782,478,000	9/12/13		698,516		704,515		5,999
BUY		KRW	Merrill Lynch International Bank	1,645,523,000	9/12/13		1,478,014		1,481,570		3,556
BUY		KRW	Merrill Lynch International Bank	638,469,000	9/12/13		571,184		574,855		3,671
BUY		KRW	UBS AG	779,297,000	10/28/13		698,608		699,618		1,010
BUY		MXN	Merrill Lynch International Bank	7,477,000	10/18/13		556,984		557,384		400
SELL		MXN	Barclays Bank PLC	3,643,000	10/18/13		279,004		271,573		7,431
SELL		MXN	Citibank N.A.	11,448,496	10/18/13		854,090		853,444		646
SELL		MXN	Barclays Bank PLC	9,078,175	10/18/13		716,866		676,746		40,120

Portfolio of Investments (unaudited) – continued

Forward Foreign Currency Exchange Contracts at 8/31/13 - continued


Type	Currency		Counterparty	Contracts to Deliver/Receive	Settlement Date Range	In Exchange For		Contracts at Value		Net Unrealized Appreciation (Depreciation)
Asset Derivatives – continued
SELL		MXN	JPMorgan Chase Bank N.A.	28,098,000	9/03/13	$	2,138,208	$	2,102,986	$	35,222
SELL		MXN	Merrill Lynch International Bank	3,718,000	9/03/13		296,507		278,273		18,234
SELL		MXN	UBS AG	9,905,000	9/03/13		760,344		741,337		19,007
BUY		MYR	Barclays Bank PLC	50,628,010	10/21/13		15,281,160		15,366,725		85,565
SELL		NOK	Goldman Sachs International	9,602	10/18/13		1,568		1,566		2
BUY		PLN	Deutsche Bank AG	1,165,000	9/13/13		343,162		360,256		17,094
SELL		PLN	Goldman Sachs International	238,000	10/18/13		73,900		73,440		460
SELL		PLN	UBS AG	370,000	9/12/13		116,227		114,423		1,804
SELL		RUB	Credit Suisse Group	42,207,588	9/12/13		1,273,000		1,264,042		8,958
SELL		RUB	JPMorgan Chase Bank N.A.	375,591,563	9/12/13-9/18/13		11,360,063		11,247,914		112,149
BUY		SEK	Goldman Sachs International	7,379,772	10/18/13		1,097,523		1,112,406		14,883
SELL		SGD	Credit Suisse Group	2,000	10/18/13		1,586		1,568		18
SELL		THB	JPMorgan Chase Bank N.A.	338,833,801	9/17/13		10,825,804		10,517,975		307,829
SELL		TRY	Barclays Bank PLC	8,487,912	10/11/13-10/21/13		4,363,388		4,130,921		232,467
SELL		TRY	Citibank N.A.	3,415,000	10/11/13		1,720,345		1,663,114		57,231
SELL		TRY	Goldman Sachs International	6,386,978	10/11/13		3,167,425		3,110,475		56,950
SELL		TRY	JPMorgan Chase Bank N.A.	3,322,000	10/11/13		1,667,918		1,617,823		50,095
BUY		ZAR	Merrill Lynch International Bank	1,866,000	10/18/13		179,970		180,259		289
SELL		ZAR	Citibank N.A.	8,451,000	10/18/13		825,344		816,382		8,962
SELL		ZAR	Goldman Sachs International	1,864,000	10/18/13		185,514		180,066		5,448
SELL		ZAR	Merrill Lynch International Bank	29,000	10/18/13		2,829		2,801		28

										$	2,607,279

Liability Derivatives
BUY		AUD	Credit Suisse Group	277,000	10/18/13	$	250,696	$	245,819	$	(4,877	)
BUY		AUD	Westpac Banking Corp.	819,000	10/18/13		754,643		726,809		(27,834	)
BUY		BRL	Citibank N.A.	858,000	10/02/13		361,035		357,244		(3,791	)
BUY		BRL	Deutsche Bank AG	971,000	9/04/13		419,438		406,966		(12,472	)
BUY		BRL	Goldman Sachs International	2,375,000	9/03/13-9/04/13		1,049,327		995,411		(53,916	)
BUY		BRL	JPMorgan Chase Bank N.A.	31,929,219	9/03/13-10/02/13		13,559,595		13,378,762		(180,833	)
BUY		BRL	UBS AG	2,964,000	9/04/13		1,263,309		1,242,272		(21,037	)
SELL		BRL	UBS AG	3,047,000	9/04/13		1,269,079		1,277,059		(7,980	)
BUY		CAD	Citibank N.A.	53,000	10/18/13		51,107		50,263		(844	)
BUY		CAD	Credit Suisse Group	823,000	10/18/13		799,184		780,500		(18,684	)
SELL		CAD	Merrill Lynch International Bank	4,724,695	10/18/13		4,480,209		4,480,707		(498	)
SELL		CLP	Deutsche Bank AG	614,247,453	9/16/13		1,185,172		1,200,798		(15,626	)
SELL		CNY	JPMorgan Chase Bank N.A.	9,298,000	9/13/13		1,497,745		1,518,589		(20,844	)
SELL		COP	Deutsche Bank AG	80,208,000	9/23/13		41,387		41,422		(35	)
BUY		DKK	Citibank N.A.	696,000	10/18/13		124,410		123,363		(1,047	)
BUY		EUR	Barclays Bank PLC	1,519,000	10/18/13		2,021,481		2,007,893		(13,588	)
BUY		EUR	Citibank N.A.	93,000	10/18/13		124,071		122,932		(1,139	)
BUY		EUR	Credit Suisse Group	2,651,000	10/18/13		3,551,375		3,504,230		(47,145	)
BUY		EUR	Deutsche Bank AG	265,000	10/18/13		350,751		350,291		(460	)
BUY		EUR	Goldman Sachs International	594,049	10/18/13		792,915		785,245		(7,670	)
SELL		EUR	Barclays Bank PLC	13,618,032	10/18/13		17,474,010		18,001,023		(527,013	)
SELL		EUR	Citibank N.A.	682,411	10/18/13		890,563		902,047		(11,484	)
SELL		EUR	Goldman Sachs International	3,357,204	10/18/13		4,372,185		4,437,727		(65,542	)
SELL		EUR	Merrill Lynch International Bank	689,506	10/18/13		905,754		911,425		(5,671	)
BUY		GBP	Barclays Bank PLC	77,000	10/18/13		119,301		119,286		(15	)
BUY		GBP	Citibank N.A.	55,000	10/18/13		85,610		85,204		(406	)
BUY		GBP	Goldman Sachs International	970,000	10/18/13		1,513,146		1,502,695		(10,451	)
SELL		GBP	Credit Suisse Group	407,426	10/18/13		608,328		631,172		(22,844	)

Portfolio of Investments (unaudited) – continued

Forward Foreign Currency Exchange Contracts at 8/31/13 - continued


Type	Currency		Counterparty	Contracts to Deliver/Receive	Settlement Date Range	In Exchange For		Contracts at Value		Net Unrealized Appreciation (Depreciation)
Liability Derivatives – continued
SELL		GBP	Deutsche Bank AG	353,000	10/18/13	$	534,782	$	546,857	$	(12,075	)
SELL		GBP	Goldman Sachs International	2,007,549	10/18/13		3,050,564		3,110,035		(59,471	)
SELL		GBP	Merrill Lynch International Bank	407,426	10/18/13		608,152		631,172		(23,020	)
BUY		HUF	Citibank N.A.	688,783,217	10/21/13		3,038,529		3,009,374		(29,155	)
BUY		HUF	Goldman Sachs International	149,717,000	10/21/13		666,327		654,131		(12,196	)
BUY		INR	Deutsche Bank AG	86,321,000	10/28/13		1,427,724		1,287,038		(140,686	)
BUY		JPY	Barclays Bank PLC	329,037,000	10/18/13		3,389,069		3,351,900		(37,169	)
BUY		JPY	Citibank N.A.	34,345,000	10/18/13		355,745		349,873		(5,872	)
BUY		JPY	Goldman Sachs International	168,687,000	10/18/13		1,736,938		1,718,415		(18,523	)
SELL		JPY	Barclays Bank PLC	26,313,000	10/18/13		267,700		268,051		(351	)
SELL		JPY	Deutsche Bank AG	103,596,356	10/18/13		1,026,760		1,055,336		(28,576	)
SELL		JPY	Goldman Sachs International	76,736,436	10/18/13		776,888		781,714		(4,826	)
BUY		MXN	Barclays Bank PLC	17,127,000	9/03/13-10/18/13		1,308,862		1,279,790		(29,072	)
BUY		MXN	Citibank N.A.	45,535,000	9/03/13-10/18/13		3,560,918		3,403,675		(157,243	)
BUY		MXN	Goldman Sachs International	63,216,456	9/03/13-10/18/13		4,950,395		4,713,499		(236,896	)
BUY		MXN	JPMorgan Chase Bank N.A.	5,707,181	10/03/13		427,584		426,019		(1,565	)
BUY		MXN	UBS AG	6,609,000	9/03/13-10/18/13		515,671		493,475		(22,196	)
SELL		MYR	Barclays Bank PLC	3,810,000	10/21/13		1,145,424		1,156,420		(10,996	)
SELL		MYR	JPMorgan Chase Bank N.A.	2,226,000	10/21/13		671,291		675,640		(4,349	)
BUY		NGN	JPMorgan Chase Bank N.A.	352,741,400	9/27/13-10/16/13		2,166,758		2,136,352		(30,406	)
BUY		PEN	Deutsche Bank AG	2,958,358	10/16/13		1,051,674		1,045,573		(6,101	)
BUY		PEN	JPMorgan Chase Bank N.A.	1,411,000	10/16/13		501,511		498,690		(2,821	)
BUY		PHP	Barclays Bank PLC	30,153,000	11/29/13		677,139		675,614		(1,525	)
BUY		PLN	Citibank N.A.	5,175,000	9/12/13-10/18/13		1,634,923		1,598,225		(36,698	)
BUY		PLN	Deutsche Bank AG	45,031,065	10/18/13		14,166,236		13,895,234		(271,002	)
BUY		PLN	Goldman Sachs International	115,000	10/18/13		36,168		35,486		(682	)
BUY		PLN	JPMorgan Chase Bank N.A.	4,540,000	9/12/13		1,440,881		1,403,999		(36,882	)
SELL		PLN	Goldman Sachs International	1,729,097	10/18/13		522,392		533,547		(11,155	)
BUY		RON	JPMorgan Chase Bank N.A.	9,396,816	10/15/13		2,816,524		2,790,080		(26,444	)
BUY		RUB	JP Morgan Chase Bank N.A.	11,962,000	9/12/13		359,146		358,241		(905	)
BUY		SEK	Credit Suisse Group	407,000	10/18/13		62,048		61,350		(698	)
BUY		THB	JPMorgan Chase Bank N.A.	361,290,266	9/17/13		11,588,722		11,215,062		(373,660	)
BUY		TRY	Deutsche Bank AG	620,000	10/11/13		319,160		301,942		(17,218	)
BUY		TRY	Goldman Sachs International	3,024,000	10/11/13		1,542,429		1,472,696		(69,733	)
BUY		TRY	JPMorgan Chase Bank N.A.	3,266,316	10/11/13		1,638,235		1,590,704		(47,531	)
BUY		TRY	Merrill Lynch International Bank	1,395,000	10/11/13		681,458		679,369		(2,089	)
BUY		ZAR	Barclays Bank PLC	25,255,383	10/18/13		2,483,390		2,439,717		(43,673	)
BUY		ZAR	Deutsche Bank AG	14,834,000	10/18/13		1,441,510		1,432,992		(8,518	)
BUY		ZAR	Goldman Sachs International	1,464,000	10/18/13		145,675		141,425		(4,250	)
BUY		ZAR	Merrill Lynch International Bank	5,790,000	10/18/13		580,893		559,325		(21,568	)
BUY		ZAR	UBS AG	15,652,000	10/18/13		1,577,606		1,512,013		(65,593	)
SELL		ZAR	Barclays Bank PLC	5,153,982	10/18/13		495,078		497,884		(2,806	)
SELL		ZAR	Goldman Sachs International	23,886,388	10/18/13		2,276,814		2,307,471		(30,657	)

										$	(3,030,598	)

Portfolio of Investments (unaudited) – continued

Futures Contracts Outstanding at 8/31/13

Description

Currency

Contracts

Value

Expiration Date

Unrealized
Appreciation
(Depreciation)

Asset Derivatives

Interest Rate Futures

U.S. Treasury Note 10 yr (Short)

USD

$2,609,906

December - 2013

$7,329

Liability Derivatives

Interest Rate Futures

U.S. Treasury Bond 30 yr (Short)

USD

$11,871,563

December - 2013

$(84,168

)

Swap Agreements at 8/31/13

Expiration

Notional Amount

Counterparty

Cash Flows to
Receive

Cash Flows to Pay

Fair Value

Liability Derivatives

Interest Rate Swap Agreements

1/02/17

BRL

14,000,000

JPMorgan Chase Bank N.A.

10.38% (fixed rate)

CDI (floating rate)

$(156,892

)

1/02/17

BRL

10,000,000

JPMorgan Chase Bank N.A.

11.56% (fixed rate)

CDI (floating rate)

(10,145

)

1/02/17

BRL

10,000,000

JPMorgan Chase Bank N.A.

11.68% (fixed rate)

CDI (floating rate)

(368

)

6/12/17

ZAR

14,103,000

JPMorgan Chase Bank N.A.

7.85% (fixed rate)

CDI (floating rate)

(7,682

)

6/13/17

ZAR

14,185,000

JPMorgan Chase Bank N.A.

7.80% (fixed rate)

CDI (floating rate)

(8,909

)

6/14/17

ZAR

28,451,000

JPMorgan Chase Bank N.A.

7.55% (fixed rate)

CDI (floating rate)

(29,291

)

6/18/17

ZAR

14,224,000

Merrill Lynch International

7.92% (fixed rate)

CDI (floating rate)

(6,372

)

6/25/18

MXN

40,000,000

Merrill Lynch International

5.76% (fixed rate)

CDI (floating rate)

(22,663

)

7/19/18

THB

89,683,000

JPMorgan Chase Bank N.A.

3.32% (fixed rate)

CDI (floating rate)

(28,000

)

$(270,322

)

At August 31, 2013, the fund had cash collateral of $1,020,000 and other liquid securities with an aggregate value $224,525 to cover any commitments for certain derivative contracts.

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

Supplemental Information

8/31/13 (unaudited)

(1) Investment Concentration

The fund’s performance could be closely tied to the market, currency, economic, political, regulatory, geopolitical, or other conditions in the countries or regions in which the fund invests and could be more volatile than the performance of more geographically-diversified funds. The fund may invest between 25% and 35% of its total assets in the securities of issuers in any particular industry if, at the time of investment, that industry represents 20% or more of the global bond market as a whole, as measured by an index determined by MFS to be an appropriate measure of the global bond market. At August 31, 2013, the fund did not have more than 25% of its assets invested in any one industry.

(2) Investment Valuations

Debt instruments and floating rate loans (other than short-term instruments), including restricted debt instruments, are generally valued at an evaluated or composite bid as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less generally are valued at amortized cost, which approximates market value. Exchange-traded options are generally valued at the last sale or official closing price as provided by a third-party pricing service on the exchange on which such options are primarily traded. Exchange-traded options for which there were no sales reported that day are generally valued at the last daily bid quotation as provided by a third-party pricing service on the exchange on which such options are primarily traded. Options not traded on an exchange are generally valued at a broker/dealer bid quotation. Foreign currency options are generally valued at valuations provided by a third-party pricing service. Futures contracts are generally valued at last posted settlement price as provided by a third-party pricing service on the market on which they are primarily traded. Futures contracts for which there were no trades that day for a particular position are generally valued at the closing bid quotation as provided by a third-party pricing service on the market on which such futures contracts are primarily traded. Forward foreign currency exchange contracts are generally valued at the mean of bid and asked prices for the time period interpolated from rates provided by a third-party pricing service for proximate time periods. Swap agreements are generally valued at valuations provided by a third-party pricing service, which for cleared swaps includes an evaluation of any trading activity at the clearinghouses. Open-end investment companies are generally valued at net asset value per share. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. Values obtained from third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, and other market data. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund’s valuation policies and procedures, market quotations are not considered to be readily available for most types of debt instruments and floating rate loans and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services. In addition, investments may be valued at fair value if the adviser determines that an investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Supplemental Information (unaudited) – continued

financial instruments are derivative instruments not reflected in total investments, such as future contracts, forward foreign currency exchange contracts, and swap agreements The following is a summary of the levels used as of August 31, 2013 in valuing the fund’s assets or liabilities:


Investments at Value	Level 1			Level 2			Level 3		Total
U.S. Treasury Bonds & U.S. Government Agency & Equivalents		$26,234			$77,487,423			$—		$77,513,657
Non-U.S. Sovereign Debt		—			442,143,388			—		442,143,388
U.S. Corporate Bonds		—			266,169			—		266,169
Residential Mortgage-Backed Securities		—			618,895			—		618,895
Commercial Mortgage-Backed Securities		—			3,004,641			—		3,004,641
Foreign Bonds		—			32,811,041			—		32,811,041
Mutual Funds		34,959,686			—			—		34,959,686
Total Investments		$34,985,920			$556,331,557			$—		$591,317,477

Other Financial Instruments
Futures Contracts		$(76,839	)		$—			$—		$(76,839	)
Swap Agreements		—			(270,322	)		—		(270,322	)
Forward Foreign Currency Exchange Contracts		—			(423,319	)		—		(423,319	)

For further information regarding security characteristics, see the Portfolio of Investments.

(3) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:


Aggregate cost	$636,874,936
Gross unrealized appreciation	2,402,285
Gross unrealized depreciation	(47,959,744	)
Net unrealized appreciation (depreciation)	$(45,557,459	)

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

(4) Transactions in Underlying Affiliated Funds – Affiliated Issuers


Underlying Affiliated Fund	Beginning Shares/Par Amount		Acquisitions Shares/Par Amount		Dispositions Shares/Par Amount			Ending Shares/Par Amount
MFS Institutional Money Market Portfolio		47,497,951		89,939,926		(102,478,191	)		34,959,686

Underlying Affiliated Fund	Realized Gain (Loss)		Capital Gain Distributions		Dividend Income			Ending Value
MFS Institutional Money Market Portfolio		$—		$—		$9,343			$34,959,686

(5) Issuer Country Weightings

Issuer country weighting percentages of portfolio holdings based on net assets, as of August 31, 2013, are as follows:


United States			15.5%
Japan			11.7%
Brazil			8.3%
Russia			7.2%
Mexico			5.3%
South Africa			5.2%
Italy			5.0%
Turkey			4.7%
United Kingdom			3.9%
Other Countries			33.2%

The issuer country weighting percentages include both accrued interest amounts and the equivalent exposure from any derivative holdings, if applicable.

QUARTERLY REPORT

August 31, 2013

LOGO

MFS® ABSOLUTE RETURN FUND

LOGO

PORTFOLIO OF INVESTMENTS

8/31/13 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.


Issuer	Shares/Par		Value ($)

Bonds - 92.1%
Asset-Backed & Securitized - 10.9%
AmeriCredit Automobile Receivables Trust, “A2”, 0.74%, 2016	$	560,000	$	560,132
Anthracite Ltd., “A”, CDO, FRN, 0.543%, 2019 (z)		42,463		42,205
ARI Fleet Lease Trust, “A”, FRN, 0.732%, 2020 (n)		369,678		370,496
ARI Fleet Lease Trust, “A”, FRN, 0.482%, 2021 (n)		479,491		478,641
Cent CDO XI Ltd., “A1”, FRN, 0.526%, 2019 (n)		428,934		421,270
Chesapeake Funding LLC, “A”, FRN, 0.932%, 2023 (n)		502,791		504,444
Chesapeake Funding LLC, “A”, FRN, 0.632%, 2025 (n)		800,000		798,616
Citigroup/Deutsche Bank Commercial Mortgage Trust, 5.322%, 2049		430,000		470,392
CNH Equipment Trust, “A2”, 0.45%, 2016		600,000		599,798
CNH Equipment Trust, “A2”, 0.63%, 2017		480,000		479,999
CNH Wholesale Master Note Trust, “A”, FRN, 0.79%, 2019 (n)		772,000		771,991
Credit Acceptance Auto Loan Trust, “A”, 2.2%, 2019 (z)		250,000		252,463
Credit Suisse Commercial Mortgage Trust, “A4”, FRN, 5.954%, 2039		317,771		351,193
Ford Credit Auto Owner Trust, “A2”, 0.4%, 2015		384,985		384,889
Ford Credit Floorplan Master Owner Trust, “A”, FRN, 0.532%, 2016		490,000		490,010
Ford Credit Floorplan Master Owner Trust, “A2”, FRN, 0.784%, 2015		312,000		312,095
GE Equipment Small Ticket LLC, “A2”, 0.73%, 2016 (n)		500,000		499,889
GE Equipment Transportation LLC, “A2”, 0.77%, 2014		29,391		29,394
GE Equipment Transportation LLC, “A2”, 0.47%, 2015		342,737		342,619
HLSS Servicer Advance Receivables Trust, 2013-T1, “A1”, 0.898%, 2044 (n)		740,000		739,556
Home Loan Servicing Solutions Ltd., 1.34%, 2043 (n)		200,000		200,120
Honda Auto Receivables Owner Trust, “A2”, 0.54%, 2016		740,000		740,083
Hyundai Auto Lease Securitization Trust, “A2” , 0.51%, 2015 (n)		480,000		479,757
Hyundai Auto Lease Securitization Trust, “A2”, 0.75%, 2016 (n)		750,000		749,753
Hyundai Auto Receivables Trust, “A3”, 1.16%, 2015		32,360		32,399
John Deere Owner Trust, “A2”, 0.55%, 2016		250,000		249,989
JPMorgan Chase Commercial Mortgage Securities Corp., 5.42%, 2049		438,000		481,618
Kingsland III Ltd., “A1”, CDO, FRN, 0.477%, 2021 (z)		350,481		345,924
Mercedes Benz Master Owner Trust, FRN, 0.452%, 2016 (n)		1,000,000		996,563
Nissan Master Owner Trust Receivables 2013,“A”, FRN, 0.484%, 2018		760,000		759,057
Porsche Innovative Lease Owner Trust, 0.44%, 2015 (n)		261,725		261,650
Race Point CLO Ltd., “A1A”, FRN, 0.465%, 2021 (n)		620,000		610,541
Santander Drive Auto Receivable Trust, “A2”, 0.91%, 2015		99,617		99,643
Santander Drive Auto Receivable Trust, “A2”, 0.57%, 2015		348,940		348,870
Santander Drive Auto Receivable Trust, “A2”, 0.47%, 2016		313,256		313,187
Smart Trust, “A2B”, FRN, 0.732%, 2014 (n)		165,094		165,104
Smart Trust, “A2B”, FRN, 0.515%, 2015 (n)		327,414		327,548
Smart Trust, “A2B”, FRN, 0.25%, 2015		400,000		399,153
Volvo Financial Equipment LLC, “A2”, 0.53%, 2015 (n)		1,450,000		1,449,036
Wachovia Bank Commercial Mortgage Trust, “A3”, FRN, 6.123%, 2051		395,109		403,117

			$	18,313,204
Automotive - 4.0%
American Honda Finance Corp., 1.6%, 2018 (n)	$	229,000	$	223,422
American Honda Finance Corp., 1.85%, 2014 (n)		620,000		628,640
American Honda Finance Corp., FRN, 0.486%, 2014 (n)		200,000		200,360
American Honda Finance Corp., FRN, 0.637%, 2016 (n)		200,000		200,085
Daimler Finance North America LLC, 0.945%, 2016 (n)		160,000		160,002
Daimler Finance North America LLC, FRN, 0.87%, 2015 (n)		700,000		702,169
Daimler Finance North America LLC, FRN, 1.472%, 2013 (n)		300,000		300,073
Daimler Finance North America LLC, FRN, 0.886%, 2014 (n)		700,000		701,325
Ford Motor Credit Co. LLC, 4.207%, 2016		200,000		209,470

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Automotive - continued
Harley-Davidson Financial Services, 3.875%, 2016 (n)	$	420,000	$	444,258
Hyundai Capital America, 1.625%, 2015 (n)		700,000		699,811
Nissan Motor Acceptance Corp., 4.5%, 2015 (n)		300,000		314,730
RCI Banque S.A., FRN, 2.139%, 2014 (n)		430,000		431,351
Toyota Motor Credit Corp., 1.25%, 2014		260,000		262,319
Toyota Motor Credit Corp., 3.2%, 2015		125,000		130,634
Volkswagen International Finance N.V., FRN, 1.022%, 2014 (n)		600,000		601,698
Volkswagen International Finance N.V., FRN, 0.864%, 2014 (n)		450,000		451,913

			$	6,662,260
Banks & Diversified Financials (Covered Bonds) - 1.9%
Australia & New Zealand Banking Group, FRN, 0.881%, 2015 (n)	$	250,000	$	251,923
Commonwealth Bank of Australia, 0.75%, 2016 (n)		710,000		706,166
Credit Mutuel-CIC Home Loan, 1.5%, 2017 (n)		600,000		582,840
DnB Nor Boligkreditt A.S., 2.1%, 2015 (n)		500,000		512,600
Norddeutsche Landesbank, 0.875%, 2015 (n)		400,000		399,760
SpareBank 1 Boligkreditt A.S., 2.625%, 2016 (n)		400,000		414,040
Stadshypotek AB, 1.45%, 2013 (z)		250,000		250,203

			$	3,117,532
Broadcasting - 0.5%
Vivendi S.A., 2.4%, 2015 (n)	$	390,000	$	396,930
WPP Finance, 8%, 2014		375,000		401,201

			$	798,131
Brokerage & Asset Managers - 0.4%
BlackRock, Inc., 3.5%, 2014	$	125,000	$	129,583
BlackRock, Inc., 1.375%, 2015		500,000		506,575
Franklin Resources, Inc., 1.375%, 2017		97,000		94,380

			$	730,538
Cable TV - 0.9%
Comcast Corp., 5.3%, 2014	$	125,000	$	127,076
DIRECTV Holdings LLC, 4.75%, 2014		425,000		442,169
DIRECTV Holdings LLC, 2.4%, 2017		120,000		119,205
NBCUniversal Enterprise Co., FRN, 0.805%, 2016 (n)		500,000		501,651
NBCUniversal Media LLC, 2.1%, 2014		400,000		403,845

			$	1,593,946
Chemicals - 0.1%
Potash Corp. of Saskatchewan, Inc., 5.25%, 2014	$	100,000	$	103,192

Computer Software - 0.3%
Adobe Systems, Inc., 3.25%, 2015	$	425,000	$	438,835

Computer Software - Systems - 0.3%
Apple, Inc., FRN, 0.516%, 2018	$	500,000	$	499,317

Conglomerates - 1.1%
ABB Finance (USA), Inc., 1.625%, 2017	$	97,000	$	96,304
ABB Treasury Center USA, Inc., 2.5%, 2016 (n)		660,000		682,864
General Electric Co., 0.85%, 2015		200,000		199,986
Pentair Finance S.A., 1.35%, 2015		600,000		602,066
United Technologies Corp., FRN, 0.76%, 2015		240,000		241,582

			$	1,822,802

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Consumer Products - 0.7%
Avon Products, Inc., 2.375%, 2016	$	140,000	$	141,023
LVMH Moet Hennessy Louis Vuitton S.A., 1.625%, 2017 (n)		290,000		285,206
Mattel, Inc., 1.7%, 2018		139,000		135,330
Newell Rubbermaid, Inc., 2%, 2015		400,000		405,443
Newell Rubbermaid, Inc., 2.05%, 2017		236,000		231,027

			$	1,198,029
Consumer Services - 0.8%
eBay, Inc., 1.35%, 2017	$	264,000	$	260,291
Experian Finance PLC, 2.375%, 2017 (n)		249,000		245,424
Western Union Co., 2.375%, 2015		200,000		203,505
Western Union Co., FRN, 1.262%, 2015		560,000		560,867

			$	1,270,087
Defense Electronics - 0.3%
BAE Systems Holdings, Inc., 4.95%, 2014 (n)	$	420,000	$	431,786

Electrical Equipment - 0.1%
Arrow Electronics, Inc., 3%, 2018	$	141,000	$	140,662

Electronics - 0.8%
Applied Materials, Inc., 2.65%, 2016	$	400,000	$	412,945
Broadcom Corp., 1.5%, 2013		125,000		125,177
Intel Corp., 1.35%, 2017		581,000		568,924
Tyco Electronics Group S.A., 1.6%, 2015		270,000		271,909

			$	1,378,955
Emerging Market Quasi-Sovereign - 1.4%
CNOOC Finance (2013) Ltd., 1.125%, 2016	$	400,000	$	396,684
Corporacion Nacional del Cobre de Chile, 4.75%, 2014 (n)		425,000		441,967
Korea Development Bank, 1%, 2016		410,000		402,827
Korea Gas Corp., 2.25%, 2017 (n)		260,000		256,107
Petrobras International Finance Co., 3.875%, 2016		390,000		400,214
Rosneft, 3.149%, 2017 (n)		222,000		218,670
State Grid International Development Co. Ltd., 1.75%, 2018 (n)		319,000		306,523

			$	2,422,992
Emerging Market Sovereign - 0.4%
Russian Federation, 3.25%, 2017 (n)	$	400,000	$	411,960
State of Qatar, 5.15%, 2014 (n)		300,000		307,140

			$	719,100
Energy - Independent - 0.8%
Encana Corp., 5.9%, 2017	$	360,000	$	408,807
Encana Holdings Finance Corp., 5.8%, 2014		440,000		454,188
Hess Corp., 7%, 2014		400,000		410,392

			$	1,273,387
Energy - Integrated - 2.7%
BG Energy Capital PLC, 2.875%, 2016 (n)	$	550,000	$	571,767
BP Capital Markets PLC, 3.125%, 2015		450,000		471,045
BP Capital Markets PLC, 0.7%, 2015		297,000		295,832
Cenovus Energy, Inc., 4.5%, 2014		425,000		441,405
Chevron Corp., 0.889%, 2016		210,000		209,782
Chevron Corp., 1.104%, 2017		314,000		305,378
Husky Energy, Inc., 5.9%, 2014		400,000		415,486

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Energy - Integrated - continued
Petro-Canada Financial Partnership, 5%, 2014	$	420,000	$	439,514
Shell International Finance B.V., 1.125%, 2017		600,000		590,068
Total Capital Canada Ltd., FRN, 0.648%, 2016		180,000		180,939
Total Capital International S.A., 1.5%, 2017		500,000		498,800
TOTAL S.A., 3%, 2015		125,000		130,248

			$	4,550,264
Entertainment - 0.7%
Viacom, Inc., 1.25%, 2015	$	650,000	$	651,773
Walt Disney Co., 0.45%, 2015		490,000		487,571

			$	1,139,344
Financial Institutions - 1.7%
General Electric Capital Corp., 1.875%, 2013	$	175,000	$	175,086
General Electric Capital Corp., 2.15%, 2015		200,000		203,972
General Electric Capital Corp., FRN, 1.121%, 2014		700,000		702,056
General Electric Capital Corp., FRN, 0.856%, 2015		250,000		252,089
General Electric Capital Corp., FRN, 0.871%, 2016		500,000		502,464
LeasePlan Corp. N.V., 3%, 2017 (n)		340,000		339,422
LeasePlan Corp. N.V., 2.5%, 2018 (n)		200,000		192,684
NYSE Euronext, 2%, 2017		412,000		409,474

			$	2,777,247
Food & Beverages - 4.3%
Anheuser-Busch InBev S.A., 3.625%, 2015	$	500,000	$	523,276
Anheuser-Busch InBev S.A., 0.8%, 2016		300,000		298,697
Anheuser-Busch InBev S.A., 1.375%, 2017		130,000		128,535
Cadbury Schweppes U.S. Finance, 5.125%, 2013		125,000		125,415
Campbell Soup Co., FRN, 0.565%, 2014		600,000		600,992
Coca-Cola Co., 1.15%, 2018		270,000		262,010
Conagra Foods, Inc., 5.875%, 2014		325,000		335,188
Conagra Foods, Inc., 1.3%, 2016		310,000		312,017
Diageo Capital PLC, 7.375%, 2014		400,000		409,780
Diageo Capital PLC, 1.5%, 2017		300,000		297,254
General Mills, Inc., 5.2%, 2015		400,000		427,254
Heineken N.V., 0.8%, 2015 (n)		500,000		498,327
Ingredion, Inc., 3.2%, 2015		135,000		140,365
Ingredion, Inc., 1.8%, 2017		167,000		163,418
Kellogg Co., 4.45%, 2016		260,000		280,797
Kraft Foods Group, Inc., 1.625%, 2015		480,000		486,827
Molson Coors Brewing Co., 2%, 2017		500,000		502,149
PepsiCo, Inc., 2.5%, 2016		365,000		377,805
Pernod-Ricard S.A., 2.95%, 2017 (n)		410,000		418,866
SABMiller Holdings, Inc., 1.85%, 2015 (n)		220,000		222,750
SABMiller Holdings, Inc., 2.45%, 2017 (n)		340,000		346,308

			$	7,158,030
Food & Drug Stores - 0.6%
CVS Caremark Corp., 3.25%, 2015	$	350,000	$	363,844
Walgreen Co., 1%, 2015		650,000		652,027

			$	1,015,871
Gaming & Lodging - 0.3%
Wyndham Worldwide Corp., 2.95%, 2017	$	442,000	$	447,917

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Insurance - 2.7%
Aflac, Inc., 3.45%, 2015	$	400,000	$	419,430
American International Group, Inc., 3.65%, 2014		400,000		404,006
American International Group, Inc., 3%, 2015		140,000		144,025
American International Group, Inc., 5.85%, 2018		299,000		337,286
ING U.S., Inc., 2.9%, 2018		235,000		232,410
Lincoln National Corp., 4.3%, 2015		125,000		132,059
MassMutual Global Funding, FRN, 0.648%, 2014 (n)		130,000		130,190
MetLife Institutional Funding II LLC, FRN, 0.641%, 2015 (n)		350,000		350,811
MetLife, Inc., 1.756%, 2017		117,000		115,274
Metropolitan Life Global Funding I, 0.798%, 2016 (n)		530,000		531,206
New York Life Global Funding, 1.3%, 2015 (n)		740,000		745,832
PRICOA Global Funding I, FRN, 0.532%, 2015 (n)		290,000		290,002
Prudential Financial, Inc., FRN, 1.044%, 2018		650,000		651,879

			$	4,484,410
Insurance - Health - 0.3%
Aetna, Inc., 1.5%, 2017	$	94,000	$	91,275
WellPoint, Inc., 5%, 2014		400,000		421,187
Wellpoint, Inc., 1.25%, 2015		30,000		30,153

			$	542,615
Insurance - Property & Casualty - 1.0%
ACE Ltd., 2.6%, 2015	$	215,000	$	222,938
Aon Corp., 3.5%, 2015		375,000		393,020
AXIS Capital Holdings Ltd., 5.75%, 2014		370,000		391,090
Berkshire Hathaway, Inc., FRN, 0.964%, 2014		460,000		462,840
QBE Insurance Group Ltd., 2.4%, 2018 (n)		299,000		287,423

			$	1,757,311
International Market Quasi-Sovereign - 5.9%
Achmea Hypotheekbank N.V., 3.2%, 2014 (n)	$	487,000	$	502,584
Bank Nederlandse Gemeenten N.V., 1.375%, 2018 (n)		650,000		634,184
Caisse d’Amortissement de la Dette Sociale, 3.5%, 2014		800,000		820,050
Electricite de France PLC, 5.5%, 2014 (n)		500,000		509,320
FMS Wertmanagement, 0.625%, 2016		580,000		577,425
KfW Bankengruppe, 3.5%, 2014		175,000		177,888
KfW Bankengruppe, 0.5%, 2015		180,000		179,952
Kommunalbanken A.S., 1%, 2014 (n)		620,000		623,318
Kommunalbanken A.S., 0.375%, 2015 (n)		230,000		229,589
Kommunalbanken A.S., 1.75%, 2015 (n)		150,000		153,375
Kommunalbanken A.S., 1%, 2018 (n)		190,000		182,455
Kommunalbanken A.S., FRN, 0.396%, 2016 (n)		270,000		270,537
Kreditanstalt für Wiederaufbau, FRN, 0.233%, 2015		1,000,000		1,000,015
Landwirtschaftliche Rentenbank, 3.125%, 2016 (n)		300,000		316,044
Municipality Finance PLC, 2.375%, 2016		690,000		715,944
Nederlandse Waterschapsbank N.V., 1.375%, 2014 (n)		750,000		755,325
Oesterreichische Kontrollbank AG, 1.375%, 2014		1,000,000		1,004,430
Societe Financement de l’ Economie Francaise, 3.375%, 2014 (n)		150,000		153,012
Statoil A.S.A., 2.9%, 2014		125,000		128,244
Statoil A.S.A., 7.375%, 2016 (n)		400,000		460,643
Statoil A.S.A., 1.8%, 2016		180,000		183,761
Statoil A.S.A., FRN, 0.554%, 2018		290,000		290,145

			$	9,868,240

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
International Market Sovereign - 2.4%
Kingdom of Denmark, 0.375%, 2016 (n)	$	590,000	$	583,569
Kingdom of Sweden, 1%, 2018 (n)		640,000		624,128
Kommuninvest i Sverige AB, 0.5%, 2016 (n)		1,500,000		1,483,380
Republic of Finland, 1.25%, 2015 (n)		1,000,000		1,014,200
Republic of Iceland, 4.875%, 2016 (n)		381,000		396,240

			$	4,101,517
Local Authorities - 1.6%
Province of British Columbia, 2.85%, 2015	$	1,000,000	$	1,042,060
Province of Ontario, 2.3%, 2016		300,000		310,140
Province of Ontario, 1.1%, 2017		900,000		880,290
State of Illinois, 4.961%, 2016		355,000		373,783

			$	2,606,273
Machinery & Tools - 0.2%
Caterpillar Financial Services Corp., 1.1%, 2015	$	300,000	$	302,097

Major Banks - 9.6%
ABN AMRO Bank N.V., 3%, 2014 (n)	$	200,000	$	201,799
ABN AMRO Bank N.V., 1.375%, 2016 (n)		750,000		746,775
ABN AMRO Bank N.V., FRN, 2.035%, 2014 (n)		230,000		231,419
ANZ National (International) Ltd., FRN, 1.272%, 2013 (n)		450,000		451,206
Bank of Montreal, 1.45%, 2018		1,700,000		1,647,648
Bank of Nova Scotia, FRN, 0.673%, 2016		800,000		799,603
Bank of Nova Scotia, FRN, 0.788%, 2016		230,000		230,719
BNP Paribas, 2.7%, 2018		580,000		577,660
BNP Paribas, FRN, 1.169%, 2014		380,000		380,918
Canadian Imperial Bank of Commerce, FRN, 0.786%, 2016		460,000		460,789
Commonwealth Bank of Australia, 3.75%, 2014 (n)		125,000		129,313
DBS Bank Ltd., 2.35%, 2017 (n)		420,000		424,111
DNB Bank A.S.A., 3.2%, 2017 (n)		620,000		644,075
HSBC Bank PLC, 3.1%, 2016 (n)		420,000		440,075
HSBC Bank PLC, FRN, 0.904%, 2018 (n)		444,000		443,804
HSBC USA, Inc., 1.625%, 2018		100,000		96,978
ING Bank N.V., 3.75%, 2017 (n)		232,000		241,127
ING Bank N.V., FRN, 1.208%, 2016 (n)		310,000		310,766
ING Bank N.V., FRN, 1.658%, 2014 (n)		350,000		352,942
KeyCorp, 3.75%, 2015		100,000		105,221
Macquarie Bank Ltd., 5%, 2017 (n)		580,000		625,936
National Australia Bank Ltd., 2%, 2015		420,000		427,852
Nordea Bank AB, FRN, 0.725%, 2016 (n)		550,000		551,340
PNC Bank N.A., 1.3%, 2016		330,000		329,954
PNC Bank N.A., FRN, 0.574%, 2016		250,000		249,183
PNC Funding Corp., 3.625%, 2015		125,000		129,969
Royal Bank of Scotland PLC, 2.55%, 2015		530,000		540,330
Royal Bank of Scotland PLC, 4.375%, 2016		120,000		127,306
Santander International Debt S.A., 2.991%, 2013 (n)		300,000		300,561
Santander U.S. Debt S.A.U., 3.724%, 2015 (n)		100,000		101,339
Standard Chartered PLC, 3.85%, 2015 (n)		100,000		104,191
Standard Chartered PLC, FRN, 1.215%, 2014 (n)		500,000		502,600
State Street Bank & Trust Co., FRN, 0.458%, 2015		406,000		403,274
Sumitomo Mitsui Banking Corp., 1.35%, 2015		420,000		423,312
Wells Fargo & Co., 3.75%, 2014		550,000		569,069
Wells Fargo & Co., 1.25%, 2015		250,000		251,343

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Major Banks - continued
Wells Fargo & Co., FRN, 0.794%, 2016	$	420,000	$	420,364
Westpac Banking Corp., 0.95%, 2016		410,000		408,513
Westpac Banking Corp., 2%, 2017		610,000		609,824

			$	15,993,208
Medical & Health Technology & Services - 1.6%
Baxter International, Inc., 1.85%, 2017	$	210,000	$	210,835
Becton, Dickinson & Co., 1.75%, 2016		150,000		151,593
Catholic Health Initiatives, 1.6%, 2017		250,000		243,512
Covidien International Finance S.A., 6%, 2017		231,000		265,931
Covidien International Finance S.A., 1.35%, 2015		250,000		252,563
Express Scripts Holding Co., 2.1%, 2015		385,000		391,225
McKesson Corp., 0.95%, 2015		360,000		359,972
McKesson Corp., 3.25%, 2016		375,000		394,016
Thermo Fisher Scientific, Inc., 2.25%, 2016		440,000		446,202

			$	2,715,849
Metals & Mining - 1.5%
Anglo American Capital, 2.15%, 2013 (n)	$	400,000	$	400,280
Barrick Gold Corp., 2.5%, 2018 (n)		200,000		188,362
Barrick International (Barbados) Corp., 5.75%, 2016 (n)		153,000		162,795
Freeport-McMoRan Copper & Gold, Inc., 2.15%, 2017		440,000		430,878
Freeport-McMoRan Copper & Gold, Inc., 2.375%, 2018 (n)		270,000		252,313
Glencore Funding LLC, FRN, 1.422%, 2016 (n)		370,000		357,106
Rio Tinto Finance (USA) Ltd., 2.5%, 2016		560,000		573,802
Rio Tinto Finance (USA) Ltd., FRN, 1.113%, 2016		150,000		150,330

			$	2,515,866
Mortgage-Backed - 3.8%
Fannie Mae, 5.05%, 2016	$	753,307	$	805,846
Fannie Mae, 0.595%, 2015		981,576		976,653
Fannie Mae, 5.134%, 2016		165,858		178,598
Fannie Mae, 1.114%, 2017		410,000		403,121
Fannie Mae, 4%, 2025 (f)		991,362		1,047,316
Fannie Mae, TBA, 3%, 2028		960,000		977,400
Freddie Mac, 1.655%, 2016		197,790		199,523
Freddie Mac, 1.426%, 2017		147,000		145,582
Freddie Mac, 3.5%, 2026 (f)		536,065		560,037
Freddie Mac, 2.5%, 2028		1,123,418		1,115,519

			$	6,409,595
Municipals - 0.5%
Florida Hurricane Catastrophe Fund Finance Corp. Rev., “A”, 1.298%, 2016	$	785,000	$	776,334

Natural Gas - Distribution - 0.3%
GDF Suez, 1.625%, 2017 (n)	$	550,000	$	542,185

Natural Gas - Pipeline - 1.4%
Energy Transfer Partners LP, 8.5%, 2014	$	257,000	$	268,459
Enterprise Products Operating LP, 3.2%, 2016		400,000		419,236
Enterprise Products Operating LP, 6.5%, 2019		400,000		471,354
Kinder Morgan Energy Partners LP, 5.125%, 2014		420,000		440,908
TransCanada PipeLines Ltd., FRN, 0.953%, 2016		660,000		664,057

			$	2,264,014

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Network & Telecom - 1.5%
AT&T, Inc., 0.8%, 2015	$	620,000	$	618,307
AT&T, Inc., FRN, 0.65%, 2016		70,000		70,199
BellSouth Corp., 5.2%, 2014		520,000		544,185
France Telecom, 2.125%, 2015		125,000		127,127
Telecom Italia Capital, 5.25%, 2013		400,000		402,930
Verizon Communications, Inc., 0.7%, 2015		730,000		727,143

			$	2,489,891
Oil Services - 0.1%
Transocean, Inc., 2.5%, 2017	$	155,000	$	153,576

Oils - 0.1%
Phillips 66, 1.95%, 2015	$	180,000	$	182,719

Other Banks & Diversified Financials - 5.0%
Abbey National Treasury Services PLC, 3.05%, 2018	$	238,000	$	238,899
American Express Centurion Bank, FRN, 0.715%, 2015		250,000		250,078
American Express Credit Corp., 2.8%, 2016		450,000		469,547
Bank of Tokyo-Mitsubishi UFJ Ltd., FRN, 0.712%, 2016 (n)		400,000		400,508
BB&T Corp., 2.05%, 2014		170,000		171,498
BB&T Corp., 1.45%, 2018		288,000		278,757
BBVA Senior Finance S.A. Unipersonal, FRN, 2.388%, 2014		300,000		302,071
Capital One Financial Corp., 2.15%, 2015		270,000		274,330
Capital One Financial Corp., FRN, 1.418%, 2014		450,000		452,821
Capital One Financial Corp., FRN, 0.907%, 2015		320,000		320,646
Danske Bank A.S., 3.75%, 2015 (n)		100,000		103,733
Groupe BPCE S.A., FRN, 1.516%, 2016		590,000		597,077
Intesa Sanpaolo S.p.A., 3.125%, 2016		370,000		368,953
Intesa Sanpaolo S.p.A., FRN, 2.662%, 2014 (n)		200,000		200,557
Lloyds TSB Bank PLC, 4.375%, 2015 (n)		675,000		703,015
National Bank of Canada, 1.5%, 2015		270,000		273,320
Nordea Bank AB, 1.75%, 2013 (n)		125,000		125,142
Santander Holdings USA, Inc., 3.45%, 2018		260,000		263,356
Santander UK PLC, 3.875%, 2014 (n)		100,000		103,027
Skandinaviska Enskilda, 1.75%, 2018 (n)		271,000		263,829
SunTrust Banks, Inc., 3.5%, 2017		303,000		317,508
Svenska Handelsbanken AB, 4.875%, 2014 (n)		100,000		103,361
Svenska Handelsbanken AB, 2.875%, 2017		289,000		297,812
Svenska Handelsbanken AB, FRN, 0.722%, 2016		680,000		681,036
Swedbank AB, 2.125%, 2017 (n)		311,000		306,882
Union Bank, FRN, 1.209%, 2014		500,000		502,752

			$	8,370,515
Personal Computers & Peripherals - 0.2%
Hewlett-Packard Co., 2.625%, 2014	$	320,000	$	326,524

Pharmaceuticals - 2.3%
AbbVie, Inc., FRN, 1.027%, 2015	$	550,000	$	555,345
Amgen, Inc., 2.3%, 2016		450,000		462,526
Bristol-Myers Squibb Co., 0.875%, 2017		615,000		595,279
Celgene Corp., 2.45%, 2015		425,000		436,727
Mylan, Inc., 1.8%, 2016 (n)		170,000		170,107
Sanofi, 1.2%, 2014		200,000		201,784
Sanofi, 1.25%, 2018		800,000		772,482

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Pharmaceuticals - continued
Teva Pharmaceutical Finance III, 1.7%, 2014	$	420,000	$	422,796
Watson Pharmaceuticals, Inc., 1.875%, 2017		260,000		255,950

			$	3,872,996
Printing & Publishing - 0.6%
Pearson PLC, 4%, 2016 (n)	$	500,000	$	529,540
Thomson Reuters Corp., 0.875%, 2016		410,000		407,138

			$	936,678
Real Estate - 1.1%
ERP Operating, REIT, 5.125%, 2016	$	510,000	$	557,197
HCP, Inc., REIT, 2.7%, 2014		470,000		473,369
Health Care REIT, Inc., 2.25%, 2018		150,000		147,093
Mack-Cali Realty LP, 2.5%, 2017		200,000		195,242
Simon Property Group, Inc., REIT, 6.1%, 2016		222,000		247,682
Simon Property Group, Inc., REIT, 1.5%, 2018 (n)		167,000		161,449

			$	1,782,032
Retailers - 0.5%
AutoZone, Inc., 6.5%, 2014	$	125,000	$	127,551
Home Depot, Inc., 5.25%, 2013		125,000		126,689
Wesfarmers Ltd., 2.983%, 2016 (n)		400,000		415,147
Wesfarmers Ltd., 1.874%, 2018 (n)		233,000		227,198

			$	896,585
Specialty Chemicals - 0.6%
Air Products & Chemicals, Inc., 2%, 2016	$	104,000	$	105,782
Airgas, Inc., 2.95%, 2016		400,000		413,542
Ecolab, Inc., 2.375%, 2014		200,000		203,825
Ecolab, Inc., 1%, 2015		350,000		349,844

			$	1,072,993
Supermarkets - 0.2%
Tesco PLC, 2%, 2014 (n)	$	280,000	$	283,676
Woolworths Ltd., 2.55%, 2015 (n)		125,000		128,702

			$	412,378
Supranational - 1.7%
Council of Europe, 4.5%, 2014	$	800,000	$	827,056
European Investment Bank, 5%, 2013		1,000,000		1,005,100
International Bank for Reconstruction and Development, 0.5%, 2016		1,000,000		996,106

			$	2,828,262
Telecommunications - Wireless - 0.8%
America Movil S.A.B. de C.V., 2.375%, 2016	$	200,000	$	202,727
American Tower Trust I, REIT, 1.551%, 2018 (n)		500,000		481,849
Crown Castle Towers LLC, 4.523%, 2015 (n)		560,000		582,613
Vodafone Group PLC, 4.15%, 2014		125,000		128,333

			$	1,395,522
Tobacco - 1.1%
Altria Group, Inc., 8.5%, 2013	$	325,000	$	329,669
B.A.T. International Finance PLC, 8.125%, 2013 (n)		125,000		126,725
B.A.T. International Finance PLC, 1.4%, 2015 (n)		470,000		474,287
Imperial Tobacco Finance PLC, 2.05%, 2018 (n)		206,000		199,620
Lorillard Tobacco Co., 3.5%, 2016		190,000		198,265

Portfolio of Investments (unaudited) – continued


Issuer	Shares/Par		Value ($)

Bonds - continued
Tobacco - continued
Reynolds American, Inc., 1.05%, 2015	$	420,000	$	420,058
Reynolds American, Inc., 7.625%, 2016		80,000		92,567

			$	1,841,191
Transportation - Services - 0.2%
ERAC USA Finance Co., 1.4%, 2016 (n)	$	200,000	$	198,440
ERAC USA Finance Co., 2.75%, 2017 (n)		202,000		204,668

			$	403,108
U.S. Government Agencies and Equivalents - 2.9%
Aid-Egypt, 4.45%, 2015	$	730,000	$	786,970
Federal Home Loan Bank, 1.375%, 2014 (f)		2,000,000		2,017,882
National Credit Union Administration, 1.4%, 2015		820,000		832,743
Private Export Funding Corp., 1.875%, 2018		610,000		607,301
Small Business Administration, 2.25%, 2021		648,847		665,604

			$	4,910,500
Utilities - Electric Power - 4.4%
American Electric Power Co., Inc., 1.65%, 2017	$	220,000	$	213,962
Dominion Resources, Inc., 1.95%, 2016		460,000		467,852
Duke Energy Corp., 6.3%, 2014		525,000		537,097
Duke Energy Corp., 1.625%, 2017		110,000		108,741
Duke Energy Indiana, Inc., FRN, 0.619%, 2016		200,000		200,455
Enel Finance International S.A., 6.25%, 2017 (n)		410,000		448,774
Exelon Generation Co. LLC, 5.35%, 2014		400,000		406,853
Iberdrola Finance Ireland Ltd., 3.8%, 2014 (n)		475,000		486,699
ITC Holdings Corp., 5.875%, 2016 (z)		256,000		283,317
NextEra Energy Capital Co., 1.2%, 2015		70,000		70,273
NextEra Energy Capital Holdings, Inc., 1.611%, 2014		618,000		622,236
NextEra Energy Capital Holdings, Inc., 1.339%, 2015		280,000		280,360
Northeast Utilities, FRN, 1.022%, 2013		800,000		800,235
PG&E Corp., 5.75%, 2014		200,000		205,582
PPL WEM Holdings PLC, 3.9%, 2016 (n)		440,000		460,267
Progress Energy, Inc., 6.05%, 2014		500,000		514,312
PSEG Power LLC, 2.75%, 2016		190,000		196,795
Southern Co., 2.375%, 2015		550,000		566,001
Southern Co., 2.45%, 2018		50,000		50,076
Virginia Electric and Power Co., 1.2%, 2018		410,000		397,746

			$	7,317,633
Total Bonds			$	154,076,045

Money Market Funds - 7.8%
MFS Institutional Money Market Portfolio, 0.09%, at Net Asset Value (v)		13,094,088	$	13,094,088
Total Investments			$	167,170,133

Other Assets, Less Liabilities - 0.1%				148,658
Net Assets - 100.0%			$	167,318,791

(f)	All or a portion of the security has been segregated as collateral for open futures contracts.

(n)

(v)	Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

Portfolio of Investments (unaudited) – continued

(z)


Restricted Securities	Acquisition Date	Cost		Value
Anthracite Ltd., “A”, CDO, FRN, 0.543%, 2019	5/11/11		$39,819		$42,205
Credit Acceptance Auto Loan Trust, “A”, 2.2%, 2019	3/22/12		249,976		252,463
ITC Holdings Corp., 5.875%, 2016	7/09/13		286,497		283,317
Kingsland III Ltd., “A1”, CDO, FRN, 0.477%, 2021	6/14/13		345,638		345,924
Stadshypotek AB, 1.45%, 2013	6/08/11		250,075		250,203
Total Restricted Securities					$1,174,112
% of Net assets					0.7%

The following abbreviations are used in this report and are defined:


CDO		Collateralized Debt Obligation
CLO		Collateralized Loan Obligation
FRN		Floating Rate Note. Interest rate resets periodically and may not be the rate reported at period end.
PLC		Public Limited Company
REIT		Real Estate Investment Trust
TBA		To Be Announced

Abbreviations indicate amounts shown in currencies other than the U.S. dollar. All amounts are stated in U.S. dollars unless otherwise indicated. A list of abbreviations is shown below:


AUD		Australian Dollar
BRL		Brazilian Real
CAD		Canadian Dollar
CHF		Swiss Franc
EUR		Euro
GBP		British Pound
HKD		Hong Kong Dollar
JPY		Japanese Yen
KRW		Korean Won
MXN		Mexican Peso
NOK		Norwegian Krone
NZD		New Zealand Dollar
SEK		Swedish Krona
SGD		Singapore Dollar
TRY		Turkish Lira
ZAR		South African Rand

Derivative Contracts at 8/31/13

Forward Foreign Currency Exchange Contracts at 8/31/13


Type	Currency		Counterparty	Contracts to Deliver/Receive	Settlement Date Range	In Exchange For		Contracts at Value		Net Unrealized Appreciation (Depreciation)
Asset Derivatives
SELL		AUD	JPMorgan Chase Bank	6,769,282	11/12/13	$	6,013,550	$	5,997,327	$	16,223
SELL		CAD	JPMorgan Chase Bank	2,780,207	11/12/13		2,674,271		2,635,007		39,264
SELL		CHF	JPMorgan Chase Bank	5,927,337	11/12/13		6,391,108		6,373,988		17,120
BUY		GBP	JPMorgan Chase Bank	1,464,963	11/12/13		2,235,677		2,269,050		33,373
SELL		NOK	Goldman Sachs International	8,543,122	11/12/13		1,438,000		1,392,317		45,683
SELL		NZD	JPMorgan Chase Bank	5,230,770	11/12/13		4,084,025		4,022,762		61,263

										$	212,926

Portfolio of Investments (unaudited) – continued

Forward Foreign Currency Exchange Contracts at 8/31/13 - continued


Type	Currency		Counterparty	Contracts to Deliver/Receive	Settlement Date Range	In Exchange For		Contracts at Value		Net Unrealized Appreciation (Depreciation)
Liability Derivatives
BUY		EUR	Goldman Sachs International	1,535,238	11/12/13	$	2,044,000	$	2,029,565	$	(14,435	)
BUY		JPY	Goldman Sachs International	101,460,320	11/12/13		1,040,000		1,033,718		(6,282	)
SELL		JPY	Goldman Sachs International	226,889,242	11/12/13		2,296,227		2,311,638		(15,411	)
SELL		JPY	JPMorgan Chase Bank	25,165,064	11/12/13		254,684		256,392		(1,708	)
BUY		NOK	Goldman Sachs International	21,127,619	11/12/13		3,544,088		3,443,279		(100,809	)
BUY		NOK	JPMorgan Chase Bank	9,555,259	11/12/13		1,603,584		1,557,271		(46,313	)
BUY		SEK	Goldman Sachs International	23,099,767	11/12/13		3,497,661		3,479,970		(17,691	)
BUY		SEK	JPMorgan Chase Bank	14,557,514	11/12/13		2,202,080		2,193,082		(8,998	)

										$	(211,647	)

Futures Contracts Outstanding at 8/31/13


Description	Currency		Contracts		Value	Expiration Date	Unrealized Appreciation (Depreciation)
Asset Derivatives
*Equity Futures*
DAX Index (Long)		EUR		13	$3,486,760	September - 2013		$49,283
FTSE 100 Index (Long)		GBP		1	99,305	September - 2013		2,423
FTSE JSE Top 40 Index (Long)		ZAR		58	2,140,610	September - 2013		57,348
FTSE MIB Index (Short)		EUR		4	441,140	September - 2013		3,427
Hang Seng Index (Short)		HKD		12	1,659,929	September - 2013		27,303
KOSPI Index (Long)		KRW		1	111,998	September - 2013		822
Mex Bolsa Index (Short)		MXN		35	1,031,558	September - 2013		14,793
MSCI Singapore Index (Short)		SGD		62	3,313,862	September - 2013		60,410
MSCI Taiwan Index (Long)		USD		69	1,928,076	September - 2013		26,383

								$242,192

*Interest Rate Futures*
Canada Treasury Bond 10 yr (Long)		CAD		41	$5,013,576	December - 2013		$21,642
Euro Bund (Short)		EUR		72	13,385,037	September - 2013		176,020

								$197,662

								$439,854

Liability Derivatives
*Equity Futures*
Amsterdam Index (Long)		EUR		5	$479,561	September - 2013		$(16,607	)
Australian SPI 200 Index (Short)		AUD		11	1,245,312	September - 2013		(105,484	)
Bovespa Index (Long)		BRL		74	1,536,106	October - 2013		(34,856	)
CAC 40 Index (Long)		EUR		51	2,653,027	September - 2013		(100,917	)
Hang Seng China ENT Index (Long)		HKD		42	2,636,744	September - 2013		(71,920	)
IBEX Index (Long)		EUR		3	328,889	September - 2013		(17,403	)
ISE 30 Index (Long)		TRY		104	414,442	October - 2013		(9,869	)
NIFTY Index (Short)		USD		21	228,690	September - 2013		(291	)
NIKKEI 225 Index (Long)		JPY		11	1,483,452	September - 2013		(31,811	)
OMX Index (Long)		SEK		29	531,879	September - 2013		(18,903	)
Russell 2000 Index (Short)		USD		16	1,616,160	September - 2013		(51,088	)
S&P 500 E-Mini Index (Long)		USD		5	407,825	September - 2013		(5,270	)
S&P TSX 60 Index (Short)		CAD		14	1,930,998	September - 2013		(70,232	)

								$(534,651	)

Portfolio of Investments (unaudited) – continued

Futures Contracts Outstanding at 8/31/13 - continued


Description	Currency		Contracts		Value	Expiration Date	Unrealized Appreciation (Depreciation)
Liability Derivatives – continued
*Interest Rate Futures*
Australian Treasury Bond 10 yr (Long)		AUD		47	$4,906,825	September - 2013		$(91,541	)
GB Govt Bond 10 yr (Short)		GBP		19	3,221,206	December - 2013		(1,546	)
Japan Govt Bond 10 yr (Short)		JPY		9	13,231,655	September - 2013		(154,166	)
U.S. Treasury Note 10 yr (Long)		USD		71	8,823,969	December - 2013		(25,758	)
U.S. Treasury Note 5 yr (Short)		USD		29	3,470,711	December - 2013		(4,633	)

								$(277,644	)

								$(812,295	)

At August 31, 2013, the fund had cash collateral of $925,203 and other liquid securities with an aggregate value of $2,096,627 to cover any commitments for certain derivative contracts.

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

Supplemental Information

8/31/13 (unaudited)

(1) Investment Valuations

The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund’s valuation policies and procedures, market quotations are not considered to be readily available for most types of debt instruments and floating rate loans and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services. In addition, investments may be valued at fair value if the adviser determines that an investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.


Investments at Value	Level 1			Level 2			Level 3		Total
U.S. Treasury Bonds & U.S. Government Agency & Equivalents		$—			$4,910,500			$—		$4,910,500
Non-U.S. Sovereign Debt		—			19,940,111			—		19,940,111
Municipal Bonds		—			776,334			—		776,334
U.S. Corporate Bonds		—			54,945,732			—		54,945,732
Residential Mortgage-Backed Securities		—			6,409,595			—		6,409,595
Commercial Mortgage-Backed Securities		—			1,706,319			—		1,706,319
Asset-Backed Securities (including CDOs)		—			16,606,881			—		16,606,881
Foreign Bonds		—			48,780,573			—		48,780,573
Mutual Funds		13,094,088			—			—		13,094,088
Total Investments		$13,094,088			$154,076,045			$—		$167,170,133

Other Financial Instruments
Futures Contracts		$(268,275	)		$(104,166	)		$—		$(372,441	)
Forward Foreign Currency Exchange Contracts		—			1,279			—		1,279

For further information regarding security characteristics, see the Portfolio of Investments.

Supplemental Information (unaudited) – continued

(2) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:


Aggregate cost	$166,777,191
Gross unrealized appreciation	1,105,124
Gross unrealized depreciation	(712,182	)
Net unrealized appreciation (depreciation)	$392,942

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

(3) Transactions in Underlying Affiliated Funds – Affiliated Issuers


Underlying Affiliated Fund	Beginning Shares/Par Amount		Acquisitions Shares/Par Amount		Dispositions Shares/Par Amount			Ending Shares/Par Amount
MFS Institutional Money Market Portfolio		9,810,342		14,699,702		(11,415,956	)		13,094,088

Underlying Affiliated Fund	Realized Gain (Loss)		Capital Gain Distributions		Dividend Income			Ending Value
MFS Institutional Money Market Portfolio		$—		$—		$3,583			$13,094,088

(4) Issuer Country Weightings

Issuer country weighting percentages of portfolio holdings based on net assets, as of August 31, 2013, are as follows:


United States			65.3%
Canada			7.5%
France			6.2%
Australia			5.7%
Netherlands			3.6%
United Kingdom			3.4%
Sweden			3.1%
Germany			(2.6)%
Japan			(5.3)%
Other Countries			13.1%

The issuer country weighting percentages include both accrued interest amounts and the equivalent exposure from any derivative holdings, if applicable.

ITEM 2.

CONTROLS AND PROCEDURES.

(a)

Based upon their evaluation of the effectiveness of the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940 (the “Act”)) as conducted within 90 days of the filing date of this Form N-Q, the registrant’s principal financial officer and principal executive officer have concluded that those disclosure controls and procedures provide reasonable assurance that the material information required to be disclosed by the registrant on this report is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms.

(b)

There were no changes in the registrant’s internal controls over financial reporting (as defined in Rule 30a-3(d) under the Act) that occurred during the registrant’s last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.

ITEM 3.

EXHIBITS.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2): Attached hereto.

Notice

A copy of the Amended and Restated Declaration of Trust, as amended, of the Registrant is on file with the Secretary of State of The Commonwealth of Massachusetts and notice is hereby given that this instrument is executed on behalf of the Registrant by an officer of the Registrant as an officer and not individually and the obligations of or arising out of this instrument are not binding upon any of the Trustees or shareholders individually, but are binding only upon the assets and property of the respective constituent series of the Registrant.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Registrant: MFS SERIES TRUST X


By (Signature and Title)*		JOHN M. CORCORAN
		John M. Corcoran, President

Date: October 17, 2013

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)*

JOHN M. CORCORAN

John M. Corcoran, President

(Principal Executive Officer)

Date: October 17, 2013

By (Signature and Title)*

DAVID L. DILORENZO

David L. DiLorenzo, Treasurer

(Principal Financial Officer

and Accounting Officer)

Date: October 17, 2013

*	Print name and title of each signing officer under his or her signature.

Market Data

News

Trading Tools

Markets

Discover

Hot Features

Follow Feed

Options Flow

Monitor

HSA Helios Strategic I