In a slow-motion race of two retail behemoths, Amazon's trump card was its lucrative cloud-computing business.
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Amazon overtakes Walmart as largest U.S. company by revenue
Walmart had been at the top of the Fortune 500 for 13 years.
The risk for Walmart investors is not that the business will suddenly break. It is that anything merely "fine" becomes a ...
Other retailers that also traditionally cater to lower-income Americans are seeing more growth among higher-income shoppers ...
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