Is Costco Stock a Buy on the Dip as Same-Store Sales Surge?

Costco reported strong fiscal Q3 results, with revenue up 11.6% year over year to $69.15 billion and adjusted EPS up 15% to $4.93, supported by 6.6% adjusted same-store sales growth and 21.5% digital revenue growth. Membership-fee revenue rose 10.7% to $1.37 billion, paid households increased 4.1% to 82.9 million, and the company plans 12 more openings this fiscal year. Despite the solid operating performance, the article argues the stock’s near-42x forward P/E for fiscal 2027 limits upside versus peers like Amazon and Walmart.

Analysis

COST remains a quality compounder, but the setup is increasingly asymmetric against buyers at current levels. The market is paying for near-perfect execution and treating warehouse growth, membership durability, and digital penetration as if they are all equally scarce; in reality, these are becoming self-funding defenses rather than accelerants. That matters because once a retailer reaches this level of scale, incremental upside increasingly has to come from operating leverage or margin expansion, and Costco’s model deliberately gives much of that away to preserve traffic.

The more interesting second-order winner is AMZN, not because it is directly comparable, but because the same consumer behavior driving Costco’s digital growth also reinforces Amazon’s habit formation and basket expansion. Costco’s e-commerce strength validates the consumer willingness to split replenishment across channels, which tends to favor the platform with the most frictionless frequency and best search conversion. WMT also benefits as the nearest public-market analog for value-oriented share gains, but with a lower multiple and more room for investor re-rating if it keeps closing the gap on traffic and digital execution.

The key risk for COST is not a near-term earnings miss; it is multiple compression over the next 6-12 months if growth normalizes even modestly while rates stay elevated. A premium above 40x forward earnings leaves little margin for disappointment from traffic, renewal rates, or membership growth, especially if management must lean harder on price investment to defend share. The consensus is underestimating how quickly a “best-in-class” narrative can become a bond-proxy narrative when the growth rate is stable but not accelerating.

Contrarian take: the stock’s dip may be more of a valuation reset than a business warning, but the better risk/reward is to own the beneficiaries of Costco’s consumer mix rather than the name itself. If Costco’s model keeps proving resilient, the real monetization opportunity is in peers with lower expectations and higher operating leverage.

Key Decisions for Investors

• Avoid adding new COST exposure at current levels; if already long, consider trimming 20-30% and redeploying into cheaper defensives over the next 1-2 weeks.
• Initiate a pair trade: long WMT / short COST for a 3-6 month horizon, targeting valuation convergence if Costco’s multiple de-rates while Walmart continues to execute on traffic and digital mix.
• Add AMZN on pullbacks over the next 2-4 weeks as a relative beneficiary of digital basket migration; the setup favors a higher-growth compounder at a materially lower forward multiple.
• For options-oriented accounts, buy COST put spreads 3-6 months out to express mean reversion risk while capping premium outlay; thesis works if the market re-rates the stock from “quality” to “fully priced quality.”
• If holding COST long-term, hedge with a short WMT/COST basket-neutral structure only if you believe Costco’s operating momentum will persist but the multiple will contract.