Costco Stock Is 14% Below Its Record. History Says Buyers Have Usually Been Rewarded.

Costco’s September comparable sales excluding gas and currency rose 7.6%, accelerating from 5.4% in August; U.S. adjusted comparable sales increased 8% versus 5.6%. Fiscal 2026 EPS grew 14% to $20.76, but at about $942 the shares trade near 45 times earnings, a valuation level associated with mixed one-year outcomes in the article’s small historical sample. The author sees the improved sales trend as supportive but recommends buying gradually and cautions against expecting returns like those after cheaper past dips.

Analysis

The September rebound improves the operating case, but it does not resolve the equity’s main vulnerability: at roughly 45x FY26 EPS, COST is priced for durable growth and remains exposed to multiple compression even if earnings keep rising. The historical drawdown record is weak evidence for timing; notably, prior expensive-entry drawdowns could persist despite strong operating results. With an earnings yield near 2.2%, a rise in real yields or a shift away from defensive, high-quality growth could outweigh another solid comp month.

The demand signal needs one more read. Holiday timing explains part, but not all, of the sequential improvement; verify the next report’s calendar-adjusted U.S. comps, traffic versus average ticket, and whether strength persists without promotional or mix effects. Sustained traffic would support membership renewal and purchasing-frequency durability. Conversely, if Costco maintains value investment to defend share, strong sales need not translate proportionally into EPS growth. Competitors such as Walmart could face pressure to match value perceptions, but the degree of share transfer is not established by this report.

Near term, a confirmation print could support the shares; over 1–3 months, valuation and monthly sales updates likely dominate. Over 6–18 months, the key question is whether growth and membership economics can compound fast enough to justify the premium. The contrarian point: improving comps are a genuine positive, but the drawdown itself is not evidence of cheapness.

Key Decisions for Investors

• Do not treat the 14% pullback or historical rebound frequency as a standalone buy signal. Prefer a staged long: initiate only a partial position now, and add after the next monthly report confirms calendar-adjusted U.S. comp strength and healthy traffic; avoid assigning a price target without updated earnings and valuation work.
• For an existing overweight, cap position risk or consider a defined-risk put spread around the next sales update rather than shorting the business outright. Upside requires sustained comps and earnings delivery; downside is a valuation reset even with positive earnings.
• Falsification/trim trigger: calendar-adjusted comps roll back toward the August pace, traffic weakens, or EPS growth materially decelerates while the multiple remains elevated. Reassess positively if several reports show sustained underlying demand and earnings growth that supports the current premium.
• No high-conviction pair trade is warranted from this evidence alone. Track Walmart’s subsequent value positioning and Costco’s traffic/ticket mix before expressing a relative-share or margin-pressure thesis.