Costco Just Showed Why It's a Better Buy Than Walmart

Costco reported Q4 revenue of $95.7 billion, up 11.1% and above the $94.89 billion estimate, while adjusted comparable sales increased 6.7% and EPS rose 15% to $6.75. E-commerce sales grew 19.5%, although membership-fee revenue growth slowed for a third consecutive quarter to 7.3%; EPS also included a $0.15 tariff-refund benefit. Costco materially outperformed Walmart's 2.6% comparable-sales growth (3.4% excluding pharmacy-rule effects), reinforcing its relative resilience despite inflation pressure, though its 43x P/E valuation remains elevated.

Analysis

The relevant signal is not simply Costco's sales resilience; it is evidence that the warehouse-club model is taking incremental wallet share while mass merchants face a more promotional discretionary backdrop. COST's high-frequency traffic and e-commerce momentum can sustain gross-margin leverage through vendor terms, private-label mix, and faster inventory turns, whereas WMT's slower comp cadence raises the probability that margin defense increasingly relies on advertising, marketplace, and cost-cutting rather than core merchandise acceleration. TGT is the more vulnerable read-through: its discretionary mix and weaker value-perception moat leave it exposed if consumers continue consolidating staple spend into membership clubs.

The near-term complication is valuation asymmetry. COST already embeds a long duration of mid-single-digit comparable growth, unit expansion, and recurring-fee profit; a deceleration in membership-fee growth matters disproportionately because fees are the highest-margin and most predictable component of earnings. Over the next 1-3 months, monthly sales releases and renewal-rate disclosure are the key catalysts; any traffic-led slowdown, renewal slippage, or evidence that e-commerce growth is being purchased through fulfillment expense would compress the premium multiple even if headline EPS continues to beat.

Contrarian view: Costco's relative strength may reflect affluent-consumer bifurcation rather than a broadly improving retail demand environment. That is bullish for COST's operating results but not necessarily for its stock at a premium to WMT: affluent spending is correlated with equity-market confidence, creating an underappreciated downside beta if risk assets weaken. WMT's slower sales growth could be a cleaner setup if its higher-margin non-retail revenue streams offset merchandise normalization, while COST has less room for an execution surprise.

Key Decisions for Investors

• Maintain a tactical long COST / short TGT pair for 1-3 months, sized beta-neutral. The thesis is continued share capture from discretionary retail into recurring-value formats; target 8-12% relative return. Exit if Costco monthly comparable sales fall below 4% for two consecutive reports or Target demonstrates sustained discretionary-category reacceleration.
• Do not add outright COST exposure at current premium valuation; instead, wait for a post-monthly-sales pullback or use defined-risk call spreads 6-9 months out only if renewal rates stabilize and membership-fee growth reaccelerates. A premium-multiple reset on softer traffic creates materially better entry economics than chasing an in-line beat.
• Put WMT on a relative-value watch rather than shorting it outright. Initiate long WMT / short COST only if Walmart's next report shows stable U.S. comp growth with expanding operating margin from ads, marketplace, and fulfillment, while Costco fee growth slows again; that would challenge the current quality-premium spread.
• Monitor U.S. retail sales, consumer-confidence data, and equity-market drawdowns as falsifiers for the affluent-resilience thesis. A sharp risk-asset correction would likely hurt COST's multiple faster than its reported sales, making COST puts or a COST/XLP hedge appropriate around macro-event risk.