EghtesadOnline: Almost nothing seems out of reach for Amazon.com Inc. these days. Grocery stocks crumbled when the company bid for Whole Foods Market Inc. in June. Blue Apron Holdings Inc. slumped after Amazon got into prepared food kits. Sports chains slipped when Nike Inc. agreed to sell its wares on the e-commerce giant’s website.

EghtesadOnline: When Wal-Mart Stores Inc bought online retailer Jet.com for $3 billion last year, it marked a crucial moment - the world's largest brick-and-mortar retailer, after years of ceding e-commerce leadership to arch rival Amazon, intended to compete.