Mutual Fund Summary Prospectus (497k)

Summary Prospectus

May 31, 2013

Share Class	Ticker
A	RRFAX
C	RRFCX
Institutional	RRFIX

Federated Real Return Bond Fund

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A Portfolio of Federated Income Securities Trust

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Before you invest, you may want to review the Fund's Prospectus, which contains more information about the Fund and its risks. You can find the Fund's Prospectus and other information about the Fund, including the Statement of Additional Information and most recent reports to shareholders, online at FederatedInvestors.com/prospectus. You can also get this information at no cost by calling 1-800-341-7400 or by sending an email request to [e-mail] or from a financial intermediary through which Shares of the Fund may be bought or sold. The Fund's Prospectus and Statement of Additional Information, both dated May 31, 2013, are incorporated by reference into this Summary Prospectus.

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A mutual fund seeking to provide current income and real total returns by investing in inflation-indexed bonds, other fixed-income securities and derivatives.

As with all mutual funds, the Securities and Exchange Commission (SEC) has not approved or disapproved these securities or passed upon the adequacy of this Prospectus. Any representation to the contrary is a criminal offense.

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Not FDIC Insured • May Lose Value • No Bank Guarantee

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Fund Summary Information

Federated Real Return Bond Fund (the “Fund”)

RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE

The Fund's investment objective is to provide current income and real total returns. The reference to “real” means a total return in excess of the rate of inflation as measured by year-to-year changes in the consumer price index.

RISK/RETURN SUMMARY: FEES AND EXPENSES

This table describes the fees and expenses that you may pay if you buy and hold Class A Shares (A), Class C Shares (C) or Institutional Shares (IS) of the Fund. You may qualify for certain sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in certain classes (e.g., A class) of Federated Funds. More information about these and other discounts is available from your financial professional and in the “What Do Shares Cost?” section of the Prospectus on page 16.

Shareholder Fees (fees paid directly from your investment)	A	C	IS
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	4.50%	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable)	0.00%	1.00%	None
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price)	None	None	None
Redemption Fee (as a percentage of amount redeemed, if applicable)	None	None	None
Exchange Fee	None	None	None
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.40%	0.40%	0.40%
Distribution (12b-1) Fee	0.00% 1	0.75%	None
Other Expenses	0.57%	0.57%	0.32% 2
Acquired Fund Fees and Expenses	0.05%	0.05%	0.05%
Total Annual Fund Operating Expenses	1.02%	1.77%	0.77%
Fee Waivers and/or Expense Reimbursements 3	0.27%	0.27%	0.27%
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements	0.75%	1.50%	0.50%

1

The Fund has adopted a Distribution (12b-1) Plan for its Class A Shares pursuant to which the A class of the Fund may incur or charge a Distribution (12b-1) fee of up to a maximum amount of 0.05%. No such fee is currently incurred or charged by the A class of the Fund. The A class of the Fund will not incur or charge such a Distribution (12b-1) fee until such time as approved by the Fund's Board of Trustees (the ” Trustees”).

2

The Fund may incur or charge shareholder services/account administration fees on its IS class of up to a maximum amount of 0.25%. No such fees are currently incurred or charged by the IS class of the Fund. The IS class of the Fund will not incur or charge such fees until such time as approved by the Trustees.

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Total Annual Fund Operating Expenses have been restated to reflect an anticipated decrease in Other Expenses. The Adviser and its affiliates have voluntarily agreed to waive their fees and/or reimburse expenses so that the total annual fund operating expenses (excluding Acquired Fund Fees and Expenses) paid by the Fund's A, C and IS classes (after the voluntary waivers and/or reimbursements) will not exceed 0.70%, 1.45% and 0.45% (the “Fee Limit”), respectively, up to but not including the later of (the “Termination Date”): (a) June 1, 2014; or (b) the date of the Fund's next effective Prospectus. While the Adviser and its affiliates currently do not anticipate terminating or increasing these arrangements prior to the Termination Date, these arrangements may only be terminated or the Fee Limit increased prior to the Termination Date with the agreement of the Trustees.

Example

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.

The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. Expenses assuming no redemption are also shown. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:

Share Class	1 Year	3 Years	5 Years	10 Years
A:
Expenses assuming redemption	$549	$760	$988	$1,642
Expenses assuming no redemption	$549	$760	$988	$1,642
C:
Expenses assuming redemption	$280	$557	$959	$2,084
Expenses assuming no redemption	$180	$557	$959	$2,084
IS:
Expenses assuming redemption	$ 79	$246	$428	$ 954
Expenses assuming no redemption	$ 79	$246	$428	$ 954

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund Shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 10% of the average value of its portfolio.

RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE

What are the Fund's Main Investment Strategies?

The Fund pursues its investment objective by investing primarily in investment-grade, inflation-indexed bonds issued by the U.S. government, its agencies or instrumentalities and corporations. Inflation-indexed bonds are fixed-income securities that are structured to provide protection against inflation. The Fund may invest in derivative instruments, such as credit default swap agreements, to synthesize inflation-indexed bonds. In addition, the Fund may invest in high-yield, foreign and non-U.S. dollar inflation-indexed fixed-income securities when the Adviser considers the risk-return prospects of those sectors

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to be attractive. There is no limitation on the maturity or remaining maturity of the fixed-income securities purchased by the Fund. The Adviser actively manages the Fund's portfolio seeking to outperform the Fund's benchmark, the Barclays U.S. (TIPS) Index (formerly Barclays Capital U.S. (TIPS) Index). The Adviser seeks to enhance the Fund's performance by allocating relatively more of its portfolio to the types of inflation-indexed bonds that the Adviser expects to offer the best balance between real total return and risk and thus offer the greatest potential for return.

Because the Fund refers to fixed-income investments in its name, it will notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets in fixed-income investments.

What are the Main Risks of Investing in the Fund?

All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund. The primary factors that may reduce the Fund's returns include:

■	Interest Rate Risks. Prices of fixed-income securities rise and fall in response to changes in the interest rate paid by similar securities. Generally, when interest rates rise, prices of fixed-income securities fall. However, market factors, such as the demand for particular fixed-income securities, may cause the price of certain fixed-income securities to fall while the prices of other securities rise or remain unchanged. Interest rate changes have a greater effect on the price of fixed-income securities with longer durations. Duration measures the price sensitivity of a fixed-income security to changes in interest rates. Interest rate risks on inflation-indexed bonds can be more difficult to model than other types of bonds. It is important to emphasize that the Fund operates within a duration range of 0% to 120% of its benchmark.
■	Issuer Credit Risk. It is possible that interest or principal on securities will not be paid when due. Non-investment grade securities generally have a higher default risk than investment-grade securities. Such non-payment or default may reduce the value of the Fund's portfolio holdings, its share price and its performance.
■	Counterparty Credit Risk. Credit risk includes the possibility that a party to a transaction involving the Fund will fail to meet its obligations. This could cause the Fund to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategy.
■	Call Risk. The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value.
■	Prepayment Risk. When homeowners prepay their mortgages in response to lower interest rates, the Fund will be required to reinvest the proceeds at the lower interest rates available. Also, when interest rates fall, the price of mortgage-backed securities may not rise to as great an extent as that of other fixed-income securities.
■	Liquidity Risk. Trading opportunities are more limited for fixed-income securities that have not received any credit ratings, have received ratings below investment grade or are not widely held.

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■	Sector Risk. A substantial part of the Fund's portfolio may be comprised of securities issued or credit enhanced by companies in similar businesses, or with other similar characteristics. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these issuers.
■	Risk Associated with Noninvestment-Grade Securities. Securities rated below investment grade, also known as junk bonds, generally entail greater market, credit and liquidity risks than investment-grade securities. For example, their prices are more volatile, economic downturns and financial setbacks may affect their prices more negatively, and their trading market may be more limited.
■	Risk Related to the Economy. Low-grade corporate bond returns are sensitive to changes in the economy. The value of the Fund's portfolio may decline in tandem with a drop in the overall value of the stock market based on negative developments in the U.S. and global economies.
■	Risk Associated with Complex “Collateralized Mortgage Obligations (CMOs).” CMOs with complex or highly variable prepayment terms, such as companion classes, IOs, POs, Inverse Floaters and residuals, generally entail greater market, prepayment and liquidity risks than other mortgage-backed securities. For example, their prices are more volatile and their trading market may be more limited.
■	Currency Risk. Exchange rates for currencies fluctuate daily. Accordingly, the Fund may experience increased volatility with respect to the value of its Shares and its returns as a result of its exposure to foreign currencies through direct holding of such currencies or holding of non-U.S. dollar denominated securities.
■	Risk of Foreign Investing. Because the Fund invests in securities issued by foreign companies, the Fund's share price may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.
■	Risk of Investing in Emerging Market Countries. Securities issued or traded in emerging markets generally entail greater risks than securities issued or traded in developed markets. Emerging market countries may have relatively unstable governments and may present the risk of nationalization of businesses, expropriation, confiscatory taxation or, in certain instances, reversion to closed market, centrally planned economies.
■	Leverage Risk. Leverage risk is created when an investment, which includes, for example, an investment in a derivative contract, exposes the Fund to a level of risk that exceeds the amount invested. Changes in the value of such an investment magnify the Fund's risk of loss and potential for gain. Investments can have these same results if their returns are based on a multiple of a specified index, security or other benchmark.
■	Risk of Investing in Inflation-Indexed Securities. As more fully described in this Prospectus, the value of inflation-indexed securities may decline when interest rates rise and inflation declines. Additionally, it is possible that the interest payments on inflation-indexed securities may be reduced to the point that there is not any net income to distribute.
■	Risk of Investing in Derivative Contracts and Hybrid Instruments. Derivative contracts and hybrid instruments involve risks different from, or possibly greater than, risks associated with investing directly in securities and

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other traditional investments. Specific risk issues related to the use of such contracts and instruments include valuation and tax issues, increased potential for losses and/or costs to the Fund and a potential reduction in gains to the Fund. Each of these issues is described in greater detail in this prospectus. Derivative contracts and hybrid instruments may also involve other risks described in this prospectus or the Fund's Statement of Additional Information (SAI), such as interest rate, credit, currency, liquidity and leverage risks.

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Technology Risk. Proprietary and third party data and systems are utilized to support decision making for the Fund. Data imprecision, software or other technology malfunctions, programming inaccuracies and similar circumstances may impair the performance of these systems, which may negatively affect Fund performance.

The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.

Performance: Bar Chart and Table

Risk/Return Bar Chart

The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns for each class averaged over the stated periods, and includes comparative performance information. The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. Updated performance information for the Fund is available under the “Products” section at FederatedInvestors.com or by calling 1-800-341-7400.

The Fund's IS class total return for the three-month period from January 1, 2013 to March 31, 2013, was (0.09)%.

Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 4.79% (quarter ended September 30, 2007). Its lowest quarterly return was (3.14)% (quarter ended September 30, 2008).

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Average Annual Total Return Table

In addition to Return Before Taxes, Returns After Taxes is shown for the Fund's IS class to illustrate the effect of federal taxes on Fund returns. Actual after-tax returns depend on each investor's personal tax situation, and are likely to differ from those shown. After-tax returns are calculated using a standard set of assumptions. The stated returns assume the highest historical federal income and capital gains tax rates. These after-tax returns do not reflect the effect of any applicable state and local taxes. After-tax returns are not relevant to investors holding Shares through a 401(k) plan, an Individual Retirement Account or other tax-advantaged investment plans.

(For the Period Ended December 31, 2012)

Share Class	1 Year	5 Years	Since Inception 10/18/2006
A:
Return Before Taxes	0.83%	3.65%	4.72%
C:
Return Before Taxes	3.81%	3.95%	4.85%
IS:
Return Before Taxes	5.91%	4.83%	5.72%
Return After Taxes on Distributions	4.92%	4.32%	4.97%
Return After Taxes on Distributions and Sale of Fund Shares	3.83%	4.08%	4.67%
Barclays U.S. TIPS Index 1 (reflects no deduction for fees, expenses or taxes)	6.98%	7.04%	7.55%

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The Barclays U.S. TIPS Index represents securities that protect against adverse inflation and provide a minimum level of real return. To be included in this index, bonds must have cash flows linked to an inflation index, be sovereign issues denominated in U.S. currency and have more than one year to maturity, and, as a portion of the index, total a minimum amount outstanding of $100 million.

FUND MANAGEMENT

The Fund's Investment Adviser is Federated Investment Management Company.

Donald T. Ellenberger, Senior Portfolio Manager, has been the Fund's portfolio manager since inception in October 2006.

Bryan J. Dingle, Portfolio Manager, has been the Fund's portfolio manager since November 2009.

purchase and sale of fund shares

You may purchase, redeem or exchange Shares of the Fund on any day the New York Stock Exchange is open. Shares may be purchased through a financial intermediary firm that has entered into a Fund selling and/or servicing agreement with the Distributor or an affiliate (“Financial Intermediary”) or directly from the Fund, by wire or by check. Please note that certain purchase restrictions may apply. Redeem or exchange Shares through a financial intermediary or directly from the Fund by telephone at 1-800-341-7400 or by mail.

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A & C Classes

The minimum investment amount for the Fund's A and C classes is generally $1,500 for initial investments and $100 for subsequent investments. The minimum initial and subsequent investment amounts for Individual Retirement Accounts (IRAs) are $250 and $100, respectively. There is no minimum initial or subsequent investment amount required for employer-sponsored retirement plans. The minimum investment for Systematic Investment Programs is $50.

IS Class

The minimum initial investment amount for the Fund's IS class is generally $1,000,000 and there is no minimum subsequent investment amount. The minimum investment amount for Systematic Investment Programs is $50.

Tax Information

The Fund's distributions are taxable as ordinary income or capital gains except when your investment is through a 401(k) plan, an Individual Retirement Account or other tax-advantaged investment plan.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and/or its related companies may pay the intermediary for the sale of Fund Shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary's website for more information.

Federated Real Return Bond Fund
Federated Investors Funds
4000 Ericsson Drive
Warrendale, PA 15086-7561

Contact us at FederatedInvestors.com
or call 1-800-341-7400.

Federated Securities Corp., Distributor

Investment Company Act File No. 811-4577

CUSIP 31420C779
CUSIP 31420C761
CUSIP 31420C753

Q450288 (5/13)

Federated is a registered trademark of Federated Investors, Inc.
2013 ©Federated Investors, Inc.