Is Amazon's next big purchase GrubHub?

GrubHub Inc. shares skyrocketed Monday after rumors spread that the food-ordering service could be Amazon's next purchase. The investment firm Wedbush Securities suggested Amazon is considering the deal, after the company's Whole Foods buyout. GrubHub's stocks grew by up to 7.2 percent by midday, approaching its highest closing level in more than two years. “If [Amazon] wants to truly dominate food delivery the choice is clear — gobble up GrubHub,” Wedbush analyst Aaron Turner.