How Has Costco (COST) Stock Done for Investors?

Costco's shares have materially lagged in the past six months: a $10,000 DRIP position initiated six months ago would be worth $8,769 as of Dec. 9 (–12.3%), versus $11,480 for an S&P 500 index and $11,820 for a Nasdaq‑100 tracker, though the company has outperformed the S&P over three years and both the S&P and Nasdaq‑100 over five years. The pullback has compressed free‑cash‑flow multiples from roughly 95x in spring 2025 to about 50x today, even as trailing‑12‑month sales are up ~19% versus three years ago and FCF has nearly tripled; ongoing margin pressure from tariffs and inflation complicates the outlook. Investors are divided: bulls see a chance to buy a high‑quality cash machine at a relative discount, while value skeptics remain cautious and Motley Fool's Stock Advisor did not include Costco among its current top 10 picks.

Analysis

Costco's share-price performance has materially lagged over the past six months: a $10,000 DRIP position started six months ago would be worth $8,769 as of Dec. 9, a total return of negative 12.3% (annualized -22.8%), versus $11,480 for an S&P 500 index and $11,820 for a Nasdaq-100 tracker. Extending the horizon, Costco outperformed the S&P over three years and outperformed both the S&P and the Nasdaq-100 over five years, illustrating durable long-term strength despite the recent pullback.

Operationally, trailing-12-month sales are about 19% higher than three years ago and free cash flow has nearly tripled, supporting the narrative of a well-tuned cash generator; however, the free-cash-flow multiple has contracted from roughly 95x in spring 2025 to about 50x today. The company faces margin pressure from higher operating costs driven by tariffs and inflation, which complicates the outlook for sustaining elevated valuation multiples.

Investor positioning is mixed: bulls view the decline as a buying opportunity on a high-quality retailer, while value-minded investors remain cautious given still-rich valuation and macro cost headwinds; Motley Fool's Stock Advisor did not include Costco in its top 10 picks, highlighting analyst divergence. The key near-term risks are a slowdown in FCF growth or further margin compression, and the opportunity cost of underperforming broader indices remains relevant for portfolio allocation decisions.

Key Decisions for Investors

• Consider a measured accumulation approach (dollar-cost averaging) rather than a full-sized buy today given the stock's six-month underperformance and a still-elevated ~50x FCF multiple,
• Reassess conviction if trailing FCF growth decelerates or tariffs/inflation further compress margins—monitor FCF, trailing-12-month sales, and operating-cost trends as primary performance indicators,
• If short-term performance versus benchmarks matters, allocate a portion to S&P 500 or Nasdaq-100 exposure (which outpaced Costco in the past six months) or use position sizing/hedges to limit valuation-risk downside.