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On August 6, 2025, Costco (COST) surged 2.64% with a trading volume of $2.65 billion, ranking 24th in U.S. equity turnover. The retailer reported July net sales of $20.89 billion, reflecting an 8.5% year-over-year increase, driven by 6.4% growth in comparable sales. Adjusted for gasoline price and foreign exchange fluctuations, total company comparable sales rose 7.0%, underscoring resilient core retail demand. International markets outperformed, with Canada and other international regions posting 7.6% and 9.5% sales growth, respectively.
Costco’s e-commerce segment delivered robust performance, achieving a 15.1% sales increase in July, maintaining its 15.3% growth rate over 48 weeks. The company operates 910 warehouses globally, including 626 in the U.S. and Puerto Rico, and e-commerce platforms in eight countries. Expansion across 14 markets, including China, Japan, and the U.K., highlights its disciplined growth strategy. Strong operational execution is evident in the consistency between short-term (4-week) and long-term (48-week) sales trends, suggesting sustainable momentum amid economic pressures.
The strategy of purchasing the top 500 stocks by daily trading volume and holding them for one day generated a 166.71% return from 2022 to the present, outperforming the benchmark return of 29.18% by 137.53%. This underscores the role of liquidity concentration in short-term stock performance, particularly in volatile markets.

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