When amazon announced the $13.7bn acquisition of Whole Foods Market in 2017, it followed some oddball attempts to strengthen its grocery business, some conceived by Jeff Bezos himself. when the deal was announced, Amazon’s share price soared and those of its rivals, such as Walmart, fell. But since then Amazon has treated grocery more like a science experiment than an exercise in seduction, with weak results at Whole Foods and in other formats. Amazon’s purchase of Whole Foods signalled it would take a more conventional approach to the supermarket business. Why is Walmart trouncing Amazon in grocery market ?