Should You Buy, Hold or Sell Costco Stock Before Q4 Earnings?

Costco is expected to report fiscal Q4 revenue of $94.82B, up 10.1% year over year, and EPS of $6.48, up 10.4%, after 16-week Q4 sales rose 11.3% to $93.9B and comparable sales increased 9.4%. Digital comparable sales rose 19.5%, supported by membership growth, Executive-member mix and higher fee income. However, the EPS consensus has declined by $0.03 over 30 days, Earnings ESP is -0.19%, and inflation, tariff uncertainty and Costco's value pricing could pressure margins. At 39.75x forward P/E versus 27.04x for the industry, the article favors holding existing positions and awaiting results before new purchases.

Analysis

The key earnings question is not demand but incremental gross-margin conversion. COST's valuation leaves limited tolerance for a sales-led beat if merchandise margin, shrink, freight, or tariff absorption prevents operating leverage; a modest EPS/guidance disappointment can drive a sharper multiple reset than the underlying fundamentals warrant. The most important read-through is management's willingness to pass through costs: price investment protects renewal and share gains, but makes near-term earnings sensitivity asymmetric.

Near term, COST can still outperform on evidence that membership-fee growth and mix offset lower retail margins, particularly if renewal rates and Executive penetration improve. Over 1-3 months, the stock needs a credible path to sustained EPS compounding rather than another high-single-digit comp quarter; otherwise capital may rotate toward lower-multiple TGT, where margin recovery has more room to surprise. DG is not a clean beneficiary: its customer base is more exposed to food inflation and its turnaround requires execution, but an accelerating trade-down cycle would improve its traffic outlook before it benefits COST.

Contrarian view: the market may overstate tariff risk to COST relative to less-scaled retailers. Its vendor bargaining power, limited SKU architecture and private-label sourcing flexibility create more tools to defend value and gross profit than TGT or DG. That is a 6-18 month competitive advantage, but it does not eliminate the immediate risk that a premium multiple compresses if guidance fails to validate it.

Key Decisions for Investors

• Do not add directional COST exposure ahead of the release; retain core longs only with a 3-6 month horizon. Add after results only if management demonstrates stable-to-improving gross margin and does not cut the FY earnings framework; those are the necessary conditions for the current premium multiple to hold.
• For event exposure, use a defined-risk COST put spread expiring 4-8 weeks after earnings rather than an outright short. The thesis is valuation compression on margin/guidance disappointment; close if gross-margin commentary improves and the stock holds above its post-earnings high.
• Initiate a 1-3 month tactical pair of long TGT / short COST only following a COST sales beat accompanied by weak merchandise-margin commentary. TGT offers greater earnings-recovery optionality at a substantially lower valuation; stop out if COST raises its margin outlook or TGT's discretionary-category trends deteriorate.
• Monitor renewal rates, Executive-member mix, merchandise-margin rate, and tariff-cost pass-through in the call. A renewal slowdown or explicit decision to absorb incremental tariffs would validate downside; sustained membership monetization plus stable margins falsifies the bearish event thesis.