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The federal insider-trading probe has made another arrest. Winifred Jiau has been charged with providing inside information to several hedge funds, including revenue data for Marvell Technology that allowed one fund to earn profits of more than $820,000. Jiau, arrested Tuesday night at her California home by the FBI, is the seventh person publicly charged in the continuing insider-trading investigation who is associated with Primary Global Research LLC, an "expert network" firm.