BUZZ — GameStop gains after CEO buys shares worth nearly $23 million
* Video game retailer GameStop shares rise 1.87% to $27.73 premarket * Co's CEO Ryan Cohen buys shares worth $22.8 mln, raising his stake to 9.1% - SEC filing * Cohen purchases 844,130 shares at $26.75 to $27 each * This marks Cohen's second stock purchase this month, following a $17.1 million buy on Oct. 2 - SEC filin