Is Costco Stock Worth Buying Now or Still Too Pricey to Touch?

Costco (COST) trades at a forward 12-month P/E of 42.91 versus 31.06 for the retail industry and 20.69 for the S&P 500, though it sits slightly below its 12-month median (45.81). The stock has pulled back 8.5% over three months as comparable sales growth moderated (July +8.9% vs May +12.5%), while the company’s Executive Membership reached 41.2M (+9.6% YoY) and contributed ~75% of worldwide sales. Consensus calls for 9.7% sales and 13.5% EPS growth this fiscal year (and +7.8% sales, +10.2% EPS next year), leading Zacks to rate COST a Hold (Rank #3) due to limited margin/valuation cushion despite solid fundamentals.

Analysis

At this valuation, COST is more exposed to small changes in comp momentum than to any near-term collapse in demand. The market is paying for a long-duration stream of fee income and traffic resilience, so the risk is multiple compression if sales growth normalizes even modestly; that is especially true if SG&A leverage turns slightly negative from wages, freight, or tariff pass-through. In other words, the stock does not need a bad quarter to re-rate lower — it only needs fewer reasons to stay at a growth-stock multiple.

The second-order read-through is mostly relative value across retail. COST remains the cleanest quality name, but if consumers keep trading down, lower-multiple names such as DG and ROST can outperform on expectation of stabilization even if their absolute fundamentals are less pristine. For TGT, any benefit is more about valuation mean reversion than true operating superiority; the better expression here is not “retail beta” but “paying too much for perfection.”

Contrarian view: the consensus may be underestimating the durability of the membership flywheel over 6-18 months, but overestimating how much upside is left without a reacceleration in comps or margin. This is a timing issue: if the next 1-2 monthly reads stay in the high-single-digit zone, the stock can drift lower as revisions flatten. The thesis is falsified if comps re-accelerate meaningfully and the next earnings cycle brings upward EPS revisions rather than just stable estimates.

Key Decisions for Investors

• Do not initiate a new long COST position here; wait for either a deeper pullback or a forward P/E closer to the high-30s before getting aggressive. Time horizon: 1-3 months. Risk/reward: poor upside capture versus meaningful multiple risk.
• Small relative-value trade: short COST / long ROST, sized modestly, to express valuation compression rather than broad retail weakness. Time horizon: 1-3 months. Falsifier: COST outperforms ROST by >5% on reaccelerating comps or upbeat margin commentary.
• For long-only portfolios, keep COST as a hold rather than an add until the next comp print confirms stabilization above current run-rate. If comps soften further for two consecutive months, reduce exposure into any bounce.
• Use COST as an alert within consumer-retail baskets rather than a standalone short; if the stock breaks below its recent 3-month range on volume, expect further de-rating pressure across premium retail multiples.