SNH Senior Housing Properties Trust

Standard & Poor's Announces Changes to S&P Index NEW YORK, Oct. 7 /PRNewswire-FirstCall/ -- Senior Housing Properties Trust (NYSE:SNH) will replace Chelsea Property Group Inc. (NYSE:CPG) in the S&P REIT Composite Index after the close of trading on Thursday, October 14, 2004. Chelsea Property is being acquired by S&P 500 and S&P REIT Composite constituent Simon Property Group Inc. (NYSE:SPG) in a transaction expected to close on or about that date. The deal is still subject to shareholder approval. Standard & Poor's will monitor this transaction, and post any relevant updates on its website: http://www.standardandpoors.com/. Senior Housing Properties Trust's portfolio of properties includes independent living communities, assisted living facilities, skilled nursing facilities and hospitals. Headquartered in Newton, MA, the company will be added to the S&P REIT Composite Health Care property category. Following is a summary of the change: S&P REIT COMPOSITE INDEX - October 14, 2004 COMPANY REIT TYPE PROPERTY CATEGORY ADDED Senior Housing Properties Trust Equity Health Care DELETED Chelsea Property Group Equity Retail 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. Standard & Poor's, a division of The McGraw-Hill Companies (NYSE:MHP), is the world's foremost provider of independent credit ratings, indices, risk evaluation, investment research, data and valuations. With 5000 employees located in 20 countries, Standard & Poor's is an essential part of the world's financial infrastructure, and has played a leading role for more than 140 years in providing investors with the independent benchmarks they need to feel more confident about their investment and financial decisions. For more information, visit http://www.standardandpoors.com/. Founded in 1888, The McGraw-Hill Companies is a leading global information services provider meeting worldwide needs in the financial services, education and business information markets through leading brands such as Standard & Poor's, BusinessWeek and McGraw-Hill Education. The Corporation has more than 280 offices in 40 countries. Sales in 2003 were $4.8 billion. Additional information is available at http://www.mcgraw-hill.com/. DATASOURCE: Standard & Poor's CONTACT: David M. Blitzer, Ph.D. Managing Director & Chairman of the Index Committee (212) 438-3907 Web site: http://www.mcgraw-hill.com/ Web site: http://www.standardandpoors.com/

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