WASHINGTON - FleetBoston Financial Corp. sold its software unit to the Nasdaq stock market for about $10 million, a Nasdaq official said.The unit, Financial Systemware Inc. of Jersey City, N.J., sells stock-trading software to about 135 brokerages. The company's $10 million-a-year revenue is expect to soon double as it introduces new brokerage software products this summer, said Patrick Campbell, Nasdaq's chief operating officer.

The deal is Nasdaq's first purchase of a for-profit company. Nasdaq, the second-largest stock market in the United States, may make other company acquisitions as it moves to become a profit-making company itself by September, Mr. Cambell said.

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