BancBoston Robertson Stephens, the investment banking arm of Fleet Boston Corp. on Wednesday joined five other companies, Prudential Securities among them, in announcing an investment in Strike Technologies, a New York electronic communications network.

Strike Technologies went live in March with an interactive trading network for Nasdaq-listed stocks catering to broker-dealers, market makers, and institutions.

Robertson Stephens took a substantial stake, said a spokesman for Strike Technologies, who declined to elaborate. Robertson Stephens executives were unavailable to comment. There are now 24 partners in the network with a total investment of $38 million. Existing partners included Banc of America Securities, a unit of Charlotte-based Bank of America Corp. -- Niamh Ring

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