STT State Street Corporation

State Street Global Markets, the investment research and trading arm of State Street Corporation (NYSE:STT), released today the results of the State Street Investor Confidence Index(SM) for June 2005. According to the June index, investor confidence increased by 3.1 points from May's revised reading of 81.4. Developed by Harvard University professor Ken Froot and Paul O'Connell of State Street Associates, the research unit of State Street Global Markets, the index measures investor confidence on a quantitative basis, analyzing actual buying and selling patterns of institutional investors. The index is based on the financial theory that assigns precise meaning to changes in investor risk sentiment, or the willingness of investors to hold proportionally more or less of their portfolio in higher-risk investments. "Investor confidence moved upward this month, with U.S. investors feeling a notable increase in their risk appetite for risky investments around the world," commented Froot. "Confidence remains below the levels seen earlier this year. Nevertheless, after two consecutive months of substantial institutional winnowing, investors now seem willing to take on additional risk at prices they now find relatively attractive." "Investors around the world are now buying U.S. equities at a consistent, though measured, rate," added O'Connell. "This upward move in institutions' willingness to take risk across their portfolios - especially in the U.S. -- is probably more due to investor sentiment than to actual improvements in fundamentals. In the U.S., for example, we have seen interest rates and inflation remain low, but activity measures in the major developed economies have slowed slightly." Since its launch in September of 2003, the State Street Investor Confidence Index(SM) has become a key economic indicator for asset owners, investment managers and central banks. As the only index providing a quantitative measure tracking the common buying patterns of institutional investors around the world, the State Street Investor Confidence Index(SM) offers a unique look into the investment behavior and decisions of thousands of professional investors and their investment decisions. About State Street Global Markets: State Street Global Markets provides specialized investment research and trading in foreign exchange, equities, fixed income and derivatives. Its goal is to enhance and preserve portfolio values for asset managers and asset owners. From its unique position at the crossroads of the global markets, it creates and unlocks value for its clients with original flow-based research, innovative portfolio strategies, trade process optimization, and global connectivity across multiple asset classes and markets. About State Street Associates: Founded in 1999 in Cambridge, Mass., State Street Associates develops portfolio and flow research, currency management, asset allocation services and designs strategy tools to support the needs of global portfolio managers. About the State Street Investor Confidence Index(SM): The index is released globally at 10 a.m. Eastern time in Boston on the second to last Tuesday of each month. More information on the State Street Investor Confidence Index, and the calendar of release dates, is available at http://www.statestreet.com/investorconfidenceindex. The previous month's calculations for the index are revised to account for trading activity through the end of the reporting period. About State Street: State Street Corporation (NYSE: STT) is the world's leading specialist in providing institutional investors with investment servicing, investment management and investment research and trading. With $9.5 trillion in assets under custody and $1.4 trillion in assets under management as of March 31, 2005, State Street operates in 25 countries and more than 100 markets worldwide. For more information, visit State Street's Web site at www.statestreet.com. This news announcement contains forward-looking statements as defined by United States securities laws, including statements about the financial outlook and business environment. Those statements are based on current expectations and involve a number of risks and uncertainties, including those related to the pace at which State Street adds new clients or at which existing clients use additional services, the value of global and regional financial markets, the pace of cross-border investment activity, changes in interest rates, the pace of worldwide economic growth and rates of inflation, the extent of volatility in currency markets, consolidations among clients and competitors, State Street's business mix, the dynamics of markets State Street serves, and State Street's success at integrating and converting acquisitions into its business. Other important factors that could cause actual results to differ materially from those indicated by any forward-looking statements are set forth in State Street's 2004 annual report and subsequent SEC filings. State Street encourages investors to read the corporation's annual report, particularly the section on factors that may affect financial results, and its subsequent SEC filings for additional information with respect to any forward-looking statements and prior to making any investment decision. The forward-looking statements contained in this press release speak only as of the date hereof, June 21, 2005, and the company will not undertake efforts to revise those forward-looking statements to reflect events after this date.