FILE - AUGUST 8: According to reports, Walmart has agreed to buy Jet.com for $3 billion in its bid to take on Amazon. TROY, OH - MAY 11: An employee restocks a shelf in the grocery section of a Wal-Mart Supercenter May 11, 2005 in Troy, Ohio. Wal-Mart, America's largest retailer and the largest company in the world based on revenue, has evolved into a giant economic force for the U.S. economy. With growth, the company continues to weather criticism of low wages, anti-union policies as well as accusations that it has homogenized America's retail economy and driven traditional stores and shops out of business. (Photo by Chris Hondros/Getty Images)