Bankers Trust New York Corp.'s move to acquire Alex. Brown & Sons Inc. sent the stock prices of other regional brokerages soaring Monday.

With investors guessing which firm might be next to be bought out by a bank, demand was so heavy that trading in A.G. Edwards Inc., Legg Mason Inc., Raymond James & Associates, Hambrecht & Quist Group, and Morgan Keegan Inc. had to be delayed while market makers matched buy and sell orders.

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