NEW YORK, Jan. 23 /PRNewswire/ -- Encore Acquisition Co. (NYSE:EAC) will replace McDATA Corp. (NASD: MCDTA) in the S&P MidCap 400 index after the close of trading on a date to be announced. McDATA is being acquired by Brocade Communications Systems Inc. (NASD: BRCD) in a deal that is still pending final approvals. Standard & Poor's will monitor this transaction, and post any relevant updates on its website: http://www.standardandpoors.com/. Encore engages in the acquisition, development, exploration, and production of onshore oil and natural gas reserves. Headquartered in Fort Worth, TX, the company will be added to the S&P MidCap 400 GICS (Global Industry Classification Standard) Oil & Gas Exploration & Production Sub-Industry index. Following is a summary of the change: S&P MIDCAP 400 INDEX - To Be Announced COMPANY GICS ECONOMIC SECTOR GICS SUB-INDUSTRY ADDED Encore Acquisition Energy Oil & Gas Exploration & Production DELETED McDATA Information Technology Computer Storage & Peripherals Additions to and deletions from an S&P equity index do not in any way reflect an opinion on the investment merits of the companies concerned. About Standard & Poor's Standard & Poor's, a division of The McGraw-Hill Companies (NYSE:MHP), is the world's foremost provider of financial market intelligence, including independent credit ratings, indices, risk evaluation, investment research and data. With approximately 7,500 employees, including wholly-owned affiliates, located in 21 countries, Standard & Poor's is an essential part of the world's financial infrastructure and has played a leading role for more than 140 years in providing investors with the independent benchmarks they need to feel more confident about their investment and financial decisions. For more information, visit http://www.standardandpoors.com/. About The McGraw-Hill Companies: Founded in 1888, The McGraw-Hill Companies is a leading global information services provider meeting worldwide needs in the financial services, education and business information markets through leading brands such as Standard & Poor's, McGraw-Hill Education, BusinessWeek and J.D. Power and Associates. The Corporation has more than 240 offices in 36 countries. Sales in 2005 were $6.0 billion. Additional information is available at http://www.mcgraw-hill.com/. DATASOURCE: Standard & Poor's CONTACT: David M. Blitzer, Ph.D. Managing Director & Chairman of the Index Committee (212) 438-3907 Web site: http://www.standardandpoors.com/ http://www.mcgraw-hill.com/

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