FactSet Research Systems Inc. Acquires Derivative Solutions; Acquired Product Suite Complements FactSet's Fixed Income Reference Data and Portfolio Analytics Services

Based in Chicago, Derivative Solutions provides fixed incomeanalytics, portfolio management and risk management solutions to majorbanks, insurance companies, investment managers, dealers and otherfinancial institutions. Founded in 1991, Derivative Solutions is knownas a market leader in serving structured products specialists.

"Derivative Solutions has positioned itself as a leading edgeprovider of analytics to fixed income market participants," saidPhilip Hadley, FactSet's CEO. "Its suite of products, along with itsteam of highly quantitative fixed income experts, will significantlyenhance our portfolio analytics and security modeling capabilities andcomplement our current offerings for equity investment professionals."

"We are excited about the opportunity to join forces with FactSetand offer our existing and future clients the combined expertise ofboth companies," said Douglas Wheeler, the founder and CEO ofDerivative Solutions. "FactSet's service, with its premium position inthe global money management and brokerage community, as well as itsextensive available content and advanced software delivery, is theperfect platform to enhance service to our clients and expand themarket penetration of our fixed income analytics."

About FactSet

FactSet Research Systems Inc. (http://www.factset.com) is aleading provider of global financial and economic information,including fundamental data on tens of thousands of companiesworldwide. Combining more than 200 databases into its own dedicatedonline service, the Company also provides the tools to download,combine and manipulate the data for investment analysis.

The Company, headquartered in Norwalk, Connecticut, was formed in1978 and now conducts operations, along with its affiliates, from morethan twenty-two locations worldwide, including Boston, New York,Chicago, San Mateo, London, Frankfurt, Paris, Tokyo, Hong Kong andSydney.

About Derivative Solutions

Derivative Solutions Inc. is a leading provider of analytics andportfolio management software to financial institutions trading andinvesting in bond markets. Since 1991, Derivative Solutions productshave provided tools necessary for the proper valuation and riskmanagement of fixed income securities including CMOs, ABS, CMBS, CDOs,MBS, treasury, agency, corporate, municipal and derivativeinstruments. Traders, analysts, portfolio managers and risk managersat leading Wall Street institutions, as well as regional dealers,banks, insurance companies, investment managers, and other financialmarket participants use the Derivative Solutions suite of products forbond trading, portfolio management, risk management, hedging andperformance attribution.

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