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Walmart and Costco show strong growth with different models; Walmart's ad revenue offers more earnings upside.

Market News
31 Mar 2026
24/7 Wall Street
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Bullish
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Walmart reported strong Q4 results with 27% U.S. eCommerce growth and a 37% rise in global advertising revenue, reaching nearly $6.4 billion. Costco showed steady growth with 7.4% comparable sales increase and strong membership metrics, including 82.1 million paid members and a high renewal rate. Walmart's advertising business provides a unique margin expansion opportunity, while Costco relies on its loyal membership model and Kirkland brand. Walmart's valuation is lower than Costco's, suggesting more room for earnings growth, but Costco's model offers long-term stability. Investors face a choice between Walmart's digital and advertising momentum and Costco's membership-driven loyalty.

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