Standard & Poor's Announces Changes to U.S. Index

NEW YORK, June 9, 2011 /PRNewswire/ -- OYO Geospace Corp. (NASD: OYOG) will replace LaBranche & Co Inc. (NYSE: LAB), and NuVasive Inc. (NASD: NUVA) will replace American Medical Systems Holdings Inc. (NASD: AMMD) in the S&P SmallCap 600 index after the close of trading on Wednesday, June 15.  S&P MidCap 400 constituent Endo Pharmaceuticals Holdings Inc. (NASD: ENDP) is acquiring  American Medical Systems Holdings, and S&P TMI constituent Cowen Group Inc. (NASD: COWN)  is acquiring LaBranche in deals expected to be completed on or about that date pending final approvals.

Standard & Poor's will monitor these transactions, and post any relevant updates on its website: www.standardandpoors.com.

OYO Geospace designs and manufactures instruments and equipment used in the acquisition and processing of seismic data. Headquartered in Houston, TX, the company will be added to the S&P SmallCap 600 GICS (Global Industry Classification Standard) Oil & Gas Equipment & Services Sub-Industry index.

NuVasive designs, develops, and markets products for the surgical treatment of spine disorders. Headquartered in San Diego, CA, the company will be added to the S&P SmallCap 600 GICS Health Care Equipment Sub-Industry index.

Following is a summary of the changes:

S&P SMALLCAP 600 INDEX  – June 15, 2011
	COMPANY	GICS ECONOMIC SECTOR	GICS SUB-INDUSTRY
ADDED	OYO Geospace	Energy	Oil & Gas Equipment & Services
	NuVasive	Health Care	Health Care Equipment
DELETED	LaBranche & Co.	Financials	Investment Banking & Brokerage
	American Medical Systems Holdings	Health Care	Health Care Equipment

For more information about S&P Indices, please visit www.standardandpoors.com/indices.

About S&P Indices

S&P Indices, the world's leading index provider, maintains a wide variety of investable and benchmark indices to meet an array of investor needs. Over $1.25 trillion is directly indexed to Standard & Poor's family of indices, which includes the S&P 500, the world's most followed stock market index, the S&P/Case-Shiller Home Price Indices, the leading measure of U.S. home prices, the S&P Global BMI, an index with approximately 11,000 constituents, the S&P GSCI, the industry's most closely watched commodities index, and the S&P National AMT-Free Municipal Bond Index, the premier investable index for U.S. municipal bonds. For more information, please visit www.standardandpoors.com/indices.

For more information contact:

David M. Blitzer, Ph.D.

Managing Director & Chairman of the Index Committee

[phone]

SOURCE Standard & Poor's

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