NEW YORK, March 27 /PRNewswire/ -- The American Stock Exchange(R) (Amex(R)) today began trading Morgan Stanley's 11.25% High Income Trigger Securities ("HITS") mandatorily exchangeable for common shares of XM Satellite Radio Holdings Inc. Trading under the ticker symbol XMM, the 1.1 million shares of the new securities were issued at $10.00 with a maturity date of April 20 2007. The notes are issued by Morgan Stanley. The Amex specialist unit is Wolverine Trading LLP. If you have any questions or would like to receive a copy of the prospectus for XMM, please contact the Capital Markets Group at the American Stock Exchange at or call 212-306-1659. The American Stock Exchange(R) (Amex(R)) is the only primary exchange that offers trading across a full range of equities, options and exchange traded funds (ETFs), including structured products and HOLDRS(SM). In addition to its role as a national equities market, the Amex is the pioneer of the ETF, responsible for bringing the first domestic product to market in 1993. Leading the industry in ETF listings, the Amex lists 162 ETFs to date. The Amex is also one of the largest options exchanges in the U.S., trading options on broad-based and sector indexes as well as domestic and foreign stocks. DATASOURCE: American Stock Exchange CONTACT: Renee Rossi of American Stock Exchange, +1-212-306-8964, Web site: http://www.amex.com/

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