Scott DeSano, Fidelity Investments' high-profile head trader, is now working for the firm's strategic new business development unit, Fidelity confirmed Tuesday.

Fidelity declined to comment whether the move has anything to do with increasing heat from regulators, which now includes U.S. Attorney General Michael J. Sullivan in Boston. The government is looking into allegedly lavish gifts to DeSano, Fidelity Chairman Ned Johnson and Fidelity heir apparent Abigail Johnson, as well as whether brokers offered Fidelity traders drugs in exchange for their directed-brokerage business.

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