Boosted by tariff refunds, Costco's quarterly profit exceeds expectations.

After including a gain related to tariff refunds, Costco Wholesale Corp.'s quarterly profit exceeded Wall Street expectations. In the quarter ended Aug. 30, the big-box retailer reported earnings per share of $6.75 excluding certain items, above the average analyst estimate compiled by Bloomberg. Tariff refunds contributed 15 cents to earnings per share.