FHCC First Health Grp. (MM)

Calvert Social Index(TM) Quarterly Adjustments BETHESDA, March 17 /PRNewswire/ -- The Calvert Social Index Committee (Index Committee) met on March 16, 2005 to review and approve changes to the Calvert Social Index. The Index Committee meets every quarter to review the component companies of the Index for corporate actions (i.e., spin-offs, mergers and acquisitions, bankruptcy) and for the recommendations made by the Calvert Social Research Department that may affect their eligibility in the Index. The Index Committee has reviewed and approved the following additions and deletions into the Calvert Social Index, effective at the market close on March 18, 2005. ADDITIONS: Noble Corporation (NYSE:NE) was added to the Calvert Social Index as it now meets Calvert's standards for environment. DELETIONS: Furniture Brands International, Inc. (NYSE:FBN) was deleted from the Calvert Social Index as no longer meets Calvert's criteria for the environment. Consistent with our index rules, American International Group (NYSE:AIG), was deleted from the eligible securities last quarter, however, due to its weight in the Index, this security is to be deleted over four quarters because it is over 2% of the Index. The float-adjusted shares were reduced by 25% last quarter and the remaining shares will be reduced by an additional 33% this quarter. CORPORATE ACTIONS: First Health Group Corp. (NASDAQ:FHCC) was deleted from the Calvert Social Index due to its acquisition by Coventry Health Care Inc. Select Medical Corp. (NYSE:SEM) was deleted due to an acquisition by EGL Holdings Co. Calvert Social Index Construction The Calvert Social Index is created by taking the 1,000 largest companies in the U.S., representing stocks listed on the NYSE and NASDAQ-AMEX (not including closed-end mutual funds, ADRs, REITS, and non-common shares) and then ranks them in descending order based on their market capitalization. Calvert's Social Research Department analyzes each company in the base of 1,000 companies. A social audit is conducted in the following areas: environment, workplace issues, product safety, community relations, military weapons contracting, international operations and human rights, and respecting the rights of indigenous peoples. The stocks that meet Calvert's social criteria make up the Calvert Social Index. For more complete information about any Calvert mutual fund, call 800.368.2748 for a free prospectus or go to our Web site at http://www.calvert.com/. Read it carefully before you invest. Calvert mutual funds are underwritten and distributed by Calvert Distributors Inc., member NASD, a subsidiary of Calvert Group, Ltd. #3178 rev. (03/05) DATASOURCE: Calvert CONTACT: Elizabeth Laurienzo of Calvert, +1-301-657-7047, or Web site: http://www.calvert.com/

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