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Press release from PR Newswire

S&P Indices Announces Changes to U.S. Indices

Thursday, December 22, 2011

S&P Indices Announces Changes to U.S. Indices18:15 EST Thursday, December 22, 2011NEW YORK, Dec. 22, 2011 /PRNewswire/ --WPX Energy Inc. (NYSE: WPXwi) will replace Compuware Corp. (NASD: CPWR) in the S&P 500 index, Compuware will replace Exterran Holdings Inc. (NYSE: EXH) in the S&P MidCap 400 index, and Exterran Holdings will replace Skyline Corp. (NYSE: SKY) in the S&P SmallCap 600 index after the close of trading on Friday, December 30. S&P 100 & 500 constituent The Williams Companies Inc. (NYSE: WMB) is spinning off WPX Energy in a transaction expected to be completed on December 31 pending final approvals. The Williams Companies stub will remain in the S&P 500 index. Compuware's market capitalization is below $1.9 billion making it more representative of the mid cap market space, and Exterran's market capitalization is below $600 million making it more representative of the small cap market space. Skyline is ranked #600 in the SmallCap 600 index.S&P Indices will post any relevant updates on its website:  WPX Energy is an independent natural gas and oil exploration and production company. Headquartered in Tulsa, OK, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Oil & Gas Exploration & Production Sub-Industry index.Compuware provides software and web performance solutions, professional services, and application services. Headquartered in Detroit, MI, the company will be added to the S&P MidCap 400 GICS Application Software Sub-Industry index.Exterran Holdings provides operations, maintenance, service, and equipment for oil and natural gas production, processing, and transportation applications. Headquartered in Houston, TX, the company will be added to the S&P SmallCap 600 GICS Oil & Gas Equipment & Services Sub-Industry index.Following is a summary of the changes: S&P 500 INDEX  ? December 30, 2011 COMPANYGICS ECONOMIC SECTORGICS SUB-INDUSTRYADDEDWPX EnergyEnergyOil & Gas Exploration & ProductionDELETEDCompuwareInformation TechnologyApplication Software S&P MIDCAP 400 INDEX  ? December 30, 2011 COMPANYGICS ECONOMIC SECTORGICS SUB-INDUSTRYADDEDCompuwareInformation TechnologyApplication SoftwareDELETEDExterranEnergyOil & Gas Equipment & Services S&P SMALLCAP 600 INDEX  ? December 30, 2011 COMPANYGICS ECONOMIC SECTORGICS SUB-INDUSTRYADDEDExterranEnergyOil & Gas Equipment & ServicesDELETEDSkylineConsumer DiscretionaryHomebuildingFor more information about S&P Indices, please visit About S&P IndicesS&P Indices, a leading brand of the McGraw-Hill Companies (NYSE: MHP), 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: more information contact: David M. Blitzer, Ph.D.Managing Director & Chairman of the Index Committee(212) 438-3907      SOURCE S&P Indices