MSCI May Index Review Announcement Scheduled for May 11, 2010

On May 11, 2010, MSCI Inc. (NYSE: MXB), a leading provider of investment decision support tools worldwide, including indices and portfolio risk and performance analytics, will announce the results of the May 2010 Semi-Annual Index Review for the MSCI Equity Indices – including the MSCI Global Standard and MSCI Global Small Cap Indices as well as the MSCI Global Value and Growth Indices, MSCI Frontier Markets Indices, the MSCI Global Islamic and MSCI Global Islamic Small Cap Indices, the MSCI High Dividend Yield Indices, the MSCI Pan-Euro and MSCI Euro Indices, the MSCI US Equity Indices, the MSCI US REIT Index, the MSCI GDP Weighted Indices, the MSCI Asia APEX 50 Index as well as the MSCI China A Indices. All changes will be implemented as of the close of May 26, 2010.

MSCI will post the list of additions to and deletions from the indices for the May 2010 Semi-Annual Index Review on its web site, www.mscibarra.com, shortly after 11:00 p.m. Central European Time (CET) on May 11, 2010.

A summary of the announcement will be made available shortly thereafter on Bloomberg page MSCN, and Reuters public pages MSCIA. MSCI will make detailed information available to clients beginning immediately after the summary announcement appears on Bloomberg and/or Reuters.

For the MSCI US Equity Indices and the MSCI US REIT Index, a summary of the announcement will be made available at www.mscibarra.com.

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About MSCI Inc.

MSCI Inc. is a leading provider of investment decision support tools to investment institutions worldwide. MSCI Inc. products include indices and portfolio risk and performance analytics for use in managing equity, fixed income and multi-asset class portfolios.

The company’s flagship products are the MSCI International Equity Indices, which include over 120,000 indices calculated daily across more than 70 countries, and the Barra risk models and portfolio analytics, which cover 56 equity and 46 fixed income markets. MSCI Inc. is headquartered in New York, with research and commercial offices around the world.

For further information on MSCI Inc., please visit our web site at www.mscibarra.com

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