Hedge Fund and Insider Trading News: Steve Cohen, Anthony Scaramucci, Bill Ackman, Alexander Klabin, Marshall Wace, Brummer & Partners, Leslie's Inc (LESL), BlackRock, Inc. (BLK), and More
A Marshall Wace hedge fund that bets on rising and falling stocks slumped to a record loss in January, as the U.S. market was shaken by a short squeeze driven by retail investors.