Costco (COST) Stock Drops Despite Market Gains: Important Facts to Note

Costco stock declined 2.24% to $934.66, underperforming the broader market which gained 0.72%. The stock has dropped 1.84% over the past month, lagging behind the Retail-Wholesale sector's 4.88% gain. However, analysts expect strong earnings growth of 10.9% YoY when the company reports on September 24, 2026, with full-year earnings projected at $20.42 per share (+13.51% YoY). Costco currently holds a Zacks Rank of #3 (Hold) but trades at a premium valuation with a Forward P/E of 46.82 versus the industry average of 25.72.