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

Costco posted Q4 comparable-sales growth of 6.7% excluding fuel and FX, revenue of $95.7 billion versus $94.89 billion expected, and EPS of $6.75, up 15% and aided by a $0.15 tariff-refund benefit. E-commerce sales rose 19.5%, while membership-fee revenue growth slowed for a third consecutive quarter to 7.3%. Costco materially outpaced Walmart’s 2.6% comparable-sales growth (3.4% adjusted), supporting the view that its higher-income membership base and store-expansion runway remain resilient despite inflation pressure; however, its 43x P/E leaves a demanding valuation.

Analysis

COST's operating outperformance is less important as a directional retail read-through than as validation of its share-gain loop: high renewal economics fund price investment, which sustains traffic and purchasing scale. The near-term incremental dollar of sales is likely carrying above-average flow-through because membership fees and ancillary businesses absorb fixed costs; however, the reported earnings beat includes a non-recurring item and should not be annualized. The key valuation issue is whether unit growth and digital penetration can keep compounding earnings rapidly enough to defend a premium multiple already pricing unusually low execution risk.

WMT's softer discretionary mix should be read as a margin and merchandising risk rather than a broad demand collapse. Its grocery-led traffic engine can still take share, but weaker general merchandise reduces higher-margin mix and could raise markdown risk over the next one to two quarters; TGT is more exposed to the same discretionary pressure with less grocery traffic insulation. AMZN is comparatively insulated through third-party mix, advertising and AWS, but a consumer pivot toward bulk/value raises the bar for retail unit economics and could pressure marketplace sellers in consumables.

The non-obvious risk to COST is that a resilient affluent customer base can mask an unfavorable mix shift: food and consumables-led growth supports traffic but delivers less merchandise-margin leverage than discretionary categories. Slower fee-revenue growth matters more than one quarter's sales beat because renewal and paid-member growth drive the highest-quality earnings stream. A deceleration in renewal rates, international unit productivity, or comparable-sales growth toward the low single digits would challenge the premium multiple before it materially damages EPS.

Consensus is likely too quick to frame this as a clean COST-versus-WMT verdict. WMT's scale, fulfillment density and advertising profit pool give it more levers to offset merchandise softness, while COST has less room for a valuation re-rating if execution merely remains excellent. The better relative expression is selective: own COST only on a valuation reset or clear evidence that membership monetization reaccelerates, rather than chase a routine beat.

Key Decisions for Investors

• Maintain a tactical long COST / short TGT pair for 1-3 months: Costco's traffic and value proposition should continue taking share while Target remains more exposed to discretionary markdowns. Size modestly because COST's premium multiple creates asymmetric downside on any comp or renewal miss; exit if COST comparable-sales growth falls below 4% or TGT guides gross margin materially higher.
• Do not add to COST following a flat-to-positive post-earnings response unless the stock retraces meaningfully or management demonstrates renewed membership-fee acceleration. Monitor paid-member growth, renewal rate and international comparable sales at the next update; a further sequential slowdown in fee growth is a valuation-risk alert.
• Use WMT as a watch-list long rather than a near-term short: reassess after the next monthly consumer or earnings update for evidence that discretionary pressure is stabilizing. A recovery in general-merchandise sales and gross-margin guidance could drive a relative rerating versus COST, given WMT's lower execution expectations.
• Maintain underweight exposure to TGT for the next 1-2 quarters, or hedge broad retail longs with XRT puts if consumer discretionary demand continues weakening. Falsification is a sustained improvement in discretionary category sales alongside inventory and gross-margin improvement, which would reduce the markdown-risk thesis.