Mark Gongloff, Columnist

Walmart Finds Amazon’s Weak Spot

The e-commerce giant learns the limits of its hugeness.

Hint: It’s food.

Photographer: Bloomberg/Bloomberg
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Nobody will ever mistake Walmart Inc., with its 5,400 stores and $340 billion market cap, for a scrappy underdog. But in the Godzilla cinematic universe that is Monopolistic Corporate America, it is maybe just a Mothra-level behemoth compared to the Mechagodzilla that is Amazon.com Inc. ($871 billion market cap, “stores” as a side hobby).