Costco: Is the Opportunity Over?

Costco shares fell nearly 20% in H2 2025 and have recovered to roughly 7% below their all-time high. Valuation metrics (P/S, P/E, P/B) are above five‑year averages; P/E hit ~45x at the nadir and topped >60x at the peak, versus the S&P ~28x. The piece concludes the stock is expensive and primarily suited to aggressive growth investors, and notes Costco was not included in the Motley Fool Stock Advisor top-10 picks.

Analysis

Costco’s core strength — the membership annuity — is also the mechanism that now pins down upside. At 40–50x forward earnings the stock requires sustained mid-to-high single‑digit same‑store sales and continued membership expansion to justify multiples that are ~60% above the S&P; any slowdown in renewal rates or basket depth will quickly remove the path to multiple expansion and leave price action driven by margin compression and cash flow growth instead.

Second‑order winners and losers are underappreciated. Suppliers to Costco face a two‑speed dynamic: products with slotting or private‑label exposure will deliver outsized volume but face permanent margin compression as Costco demands lower gross margins in exchange for scale; smaller regional wholesalers and discounters (WMT/Kroger analogs) get an easier comp to take share on higher‑margin items but will be forced to compete on memberships or services, increasing industry marketing spend and working capital needs over the next 6–18 months.

Key catalysts and tail risks are straightforward and time‑staggered: membership renewal trends and average ticket are 0–3 month leading indicators, holiday comps and gross margin trajectory are 3–6 month catalysts, while a US recession or food/energy deflation reweights multiples over 6–24 months. A contrarian pathway to upside exists — material international membership expansion or a fee increase would rapidly re‑rate the business — but both are binary and require 12–24 months to crystallize.

Given the pickiness of present valuation, tactical, asymmetric exposures work better than outright longs. Prefer structure and pairs to blunt market beta and monetize Costco’s valuation anchoring while keeping upside exposure to secular winners in the market (AI/semis) over a 6–12 month horizon.

Key Decisions for Investors

• Bear put spread on COST (size 1–2% portfolio): buy 9–12 month put 15% OTM / sell 9–12 month put 30% OTM. Rationale: caps premium paid while capturing a 15–30% downside; expected payoff 3–6x premium if membership/margin momentum deteriorates over next 6–12 months.
• Dollar‑neutral pair: short COST / long NVDA (equal dollar exposure, 6–12 month horizon): NVDA is the higher conviction secular growth anchor (AI cycle) and should outperform if retail multiples compress. Risk/reward: if COST falls 20% and NVDA rises 30–40%, net return on the pair ~25–35% with limited market directionality.
• Bull call spread on NVDA (6–9 month): buy a 30–50% OTM call / sell a further OTM call to fund cost. Size 1–3% portfolio. Rationale: asymmetric upside capture of continued AI GPU demand with defined downside (max loss = net premium).
• Event hedge: buy short‑dated (0–3 month) COST out‑of‑the‑money puts or increase cash if membership data or holiday comps miss. These are tactical hedges to protect equity exposure during high‑risk information windows with low upfront cost.