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Costco's Q3 same-store sales jump 9.8% boosted by higher gas prices amid Iran conflict

Company Fundamentals
28 May 2026
Market Watch
View Source
Bullish
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Costco reported a 9.8% increase in same-store sales for its third quarter, surpassing Wall Street expectations. The rise was largely driven by increased gasoline sales as higher gas prices, influenced by the Iran war, pushed more consumers to seek discounts at membership retailers. This trend benefits Costco and similar chains like Walmart's Sam's Club and BJ's Wholesale Club, as shoppers look for savings amid ongoing cost-of-living pressures. The mixed overall results led to muted after-hours trading, but the gas price factor remains a key growth driver.

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