Calvert Social Index Quarterly Adjustments.

BETHESDA, Md. -- The Calvert Social Index Committee ("Index Committee") met on June 10th to review and approve changes to the Calvert Social Index[R]. The Index Committee meets quarterly 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 Sustainability Research Department that may affect their eligibility for the Index. The Index Committee has reviewed and approved the following additions and deletions to the Calvert Social Index, effective at market open on June 15, 2009.

ADDITIONS:

CA, Inc. (NASDAQ:CA), a company in the Calvert Social Index Universe, was added to the Calvert Social Index as it now meets the Index's governance criteria. CA has addressed significant weaknesses in the company's management and internal controls by implementing substantial changes that demonstrate the company's commitment to a strengthened governance structure.

Rockwell Collins, Inc. (NYSE:COL), a company in the Calvert Social Index Universe, was added to the Calvert Social Index as it now meets the Index's standards for weapons due to its divestment of Rockwell Scientific.

DELETIONS:

Diebold, Inc. (NYSE:DBD), a company in the Calvert Social Index, was deleted from the Calvert Social Index as it no longer meets the Index's standards for product quality.

Weyerhaeuser Company (NYSE:WY), a company in the Calvert Social Index, was deleted from the Calvert Social Index as it no longer meets the Index's standards for Indigenous Peoples' Rights.

To see all corporate actions on components of the Calvert Social Index, go to http://calvert.com/sri_902.html.

What is the Calvert Social Index?

Calvert, a leader in sustainable and responsible investing, has created the Calvert Social Index, a broad-based, rigorously constructed benchmark for measuring the performance of US-based sustainable and responsible companies.

How is the Calvert Social Index constructed?

Calvert starts by taking the 1,000 largest companies in the US, based on total market capitalization, included in the Dow Jones Total Market Index (the "Dow Jones TMI"). The Dow Jones TMI represents the top 95% of U.S. companies based on float-adjusted market capitalization, excluding the very smallest and least-liquid stocks. Calvert's Sustainability Research Department then analyzes each company. A sustainability audit is conducted in the following areas: governance and ethics; environment; workplace; product safety and impact; community relations; international operations and human rights; and indigenous peoples' rights. The stocks that meet Calvert's sustainable and responsible criteria make up the Calvert Social Index.

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