The Best Blue Chip Stock to Buy in November and Hold for 10 Years

The article argues Costco can outperform the S&P 500 over the next decade, citing 150.4 million cardholders at fiscal 2026 year-end, up 3.6% year over year, and a worldwide renewal rate of 89.8%, up 10 basis points. The company ended fiscal 2026 with 939 warehouses and posted 8.4% comparable-sales growth (6.6% excluding fuel and foreign exchange), its 17th consecutive year of positive comps. Analysts expect fiscal 2026–2029 revenue and EPS CAGRs of 8% and 10%, respectively, while the article notes the stock trades at 46 times this year's earnings.

Analysis

The investable question is less whether Costco can keep growing than whether membership economics and incremental warehouse returns can sustain a premium multiple. Recurring fee income can cushion merchandise-margin pressure, but that protection depends on renewal behavior and member growth—not just headline sales. Verify paid-member additions, renewal rates by geography, and the timing and retention impact of any fee changes before extrapolating earnings durability.

The reported gap between headline and adjusted comps matters: fuel and foreign-exchange effects make the strongest sales figure a weaker read-through to underlying traffic and basket trends. If adjusted comps decelerate while new warehouses remain the main growth engine, investors may start questioning the return on incremental capital and the runway for openings. Costco’s scale may strengthen supplier terms, but its low-price proposition limits how much purchasing leverage can translate into merchandise-margin expansion.

Near term, the dominant risk is valuation: at the cited 46x earnings, even continued growth can coexist with a weak stock if expectations reset or rates rise. Over 1–3 months, track adjusted comps, membership additions/renewals, and guidance. Over 6–18 months, watch whether new locations mature without cannibalizing nearby stores and whether membership growth keeps pace with the estate. The bullish case may underweight multiple risk; the bearish case may underweight the resilience of recurring fees and value-seeking demand.

Key Decisions for Investors

• No chase solely on the long-term growth narrative. For existing exposure, size COST as a high-quality but valuation-sensitive holding; consider adding only after a material pullback or evidence that adjusted comps and membership metrics remain firm.
• Use the next earnings release as the key 1–3 month checkpoint: monitor adjusted comparable sales, paid-member growth, renewal rates, and management commentary on new-warehouse productivity. A sustained slowdown in these measures would weaken the premium-multiple thesis.
• For a relative-value watchlist, compare Costco with Walmart and Target on traffic, value positioning, and sales productivity rather than assuming a simple share-gain trade. Do not establish a pair until comparable operating data and relative valuation support the direction.
• Falsification: reassess the bullish thesis if adjusted comps weaken for multiple quarters, renewal rates trend down, or warehouse growth fails to produce commensurate sales and earnings contribution. Conversely, resilient member metrics alongside steady adjusted comps would support holding through valuation volatility.