Is It Too Late to Buy Costco?

Costco reported $68 billion in Q2 2026 net sales and plans 28 net new warehouses in fiscal 2026 (bringing total to 942), but its net income grew at a 13% CAGR from FY2015–FY2025. Shares trade at a rich P/E of 52.2 (roughly >100% above the S&P 500 and ~40% premium to Nvidia), and the author argues that scale-driven maturity will decelerate growth, making the current valuation likely to produce weak returns.

Analysis

The market is pricing a near-no-failure outcome into a mature membership retailer; that creates a vulnerability where multiple compression, rather than operating deterioration, will drive material downside. Vendors that are overly dependent on a single big-buyer face concentrated negotiation risk — expect a wave of supplier margin reallocation toward private-label or multi-retailer distribution strategies over the next 12–36 months.

Logistics and real-estate secondaries matter: the company's palletized, high-turn model benefits freight carriers, cold-chain providers and select industrial REITs today, but slower new-store cadence shifts capital toward return-of-capital (dividends/repurchases) vs. reinvestment, changing where incremental free cash flows flow in the ecosystem. If membership economics pressure margin levers (fees, fuel, ancillary services), the visible earnings growth path can diverge from underlying consumer demand within 2–4 quarters, creating earnings surprise risk.

Catalysts that can reverse a valuation reset are narrow and measurable: outsized international rollouts, a shock improvement in e-commerce take-rate, or a material lift in ancillary high-margin businesses (services, gasoline, optical). Practically, the next 12–24 months are a window where sentiment-driven repricing is most likely; absent those catalysts, even slight misses on same-store metrics should have outsized P/L impact because expectations are elevated relative to incremental growth opportunities.

Key Decisions for Investors

• Short COST via a 12-month put spread sized to 0.5% AUM (buy 12-month ATM puts, sell out-of-the-money puts to finance). Rationale: defined-cost downside if multiple contracts 20–30% with EPS flat; target 30–60% return if thesis occurs. Risk control: tighten or exit if membership renewals accelerate or management upsized international openings; hard stop at 30% premium paid loss.
• Pair trade — short COST / long WMT, equal notional, 12–24 month horizon. Rationale: capture relative multiple re-rating while keeping exposure to price-led, high-volume retail; target 20–35% relative return if spread normalizes. Stop/trim if COST outperforms comps by >200bps Y/Y or WMT issues negative guidance.
• Directional long NVDA (9–12 month call spread or 1% AUM outright equity) to reallocate risk from consumer retail into secular AI hardware demand. Rationale: asymmetric upside from AI-driven data-center cycles; expect 2–3x option payoff if adoption sustains. Risk: macro-driven capex pullback; trim on 15% intraday run or if data-center orders decelerate sequentially.
• Tactical defensive overlay: add 0.5% AUM in low-beta consumer staples (select names) as hedge against discretionary demand shocks that would otherwise widen COST downside. Rationale: reduces portfolio volatility during membership/margin surprise windows. Exit when retail comps re-accelerate or when COST multiple compresses by >25%.