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

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.

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DATASOURCE: Standard & Poor's



CONTACT:  David M. Blitzer, Ph.D.

Managing Director & Chairman of the Index Committee

[phone]



Web site:  http://www.standardandpoors.com/

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