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CHICAGO, IL - AUGUST 15: The Walmart logo is displayed on a shopping cart at a Walmart store on August 15, 2013 in Chicago, Illinois. Walmart, the world's largest retailer, reported a surprise decline in second-quarter same-store sales today. The retailer also cut its revenue and profit forecasts for the fiscal year.  (Photo by Scott Olson/Getty Images)
CHICAGO, IL - AUGUST 15: The Walmart logo is displayed on a shopping cart at a Walmart store on August 15, 2013 in Chicago, Illinois. Walmart, the world's largest retailer, reported a surprise decline in second-quarter same-store sales today. The retailer also cut its revenue and profit forecasts for the fiscal year.  (Photo by Scott Olson/Getty Images)

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    How Walmart is taking on Amazon

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How Walmart is taking on Amazon

Between a flurry of acquisitions, strong digital sales and an increased international presence, Walmart is going toe-to-toe with Amazon in the online retail battle.

How Walmart is taking on Amazon

Between a flurry of acquisitions, strong digital sales and an increased international presence, Walmart is going toe-to-toe with Amazon in the online retail battle.