The hedge fund at the center of the GameStop saga gained more than 20% in February. : The hedge fund at the center of the GameStop saga gained more than 20% in February, clawing back some of its losses from a brutal January, sources told CNBC's Leslie Picker. Melvin Capital, which previously had a large bet against the video game retailer, saw a return of 21.7% in February, according to the sources. The fund declined by 53% in January during the dramatic short squeeze that sent GameStop and other stocks soaring.