bed bath  beyond stock jumped 39 in premarket trading monday after gamestop ticker gme chairman ryan cohen took a big stake in the homegoods retailer and urged it to explore strategic alternatives including a full sale of the company cohen who cofounded online pet products retailer chewy ticker chwy owns a 98 stake in bed bath  beyond through his investment firm rc ventures llc according to a letter sent to its board sunday that makes him a topfive shareholder in the new jerseybased chain which is valued