One company. One framework. One lesson.

This week: Costco Wholesale (COST)

Score: 75/100 — GREAT COMPANY. WRONG PRICE.

Moat: 26/30. The membership flywheel is one of the great business models ever built. 92.3% renewal rates in the US and Canada — improving, not declining. 84.1 million paid memberships, and the 42.3 million Executive members drive over 75% of sales. Under 4,000 SKUs, a self-imposed 14–15% markup cap — legendary, though you’ll never find it in a filing — inventory turning 14 times a year. I docked points for one reason: this moat is behavioral loyalty, not pricing power. At ~3% net margins, Costco can’t price its way out of trouble — and digital-first sign-ups renew at slightly lower rates than warehouse ones. Nothing broken. But the cushion is thinner than the headline number.

Management: 16/20. Ron Vachris has spent over forty years at the company, starting as a forklift driver. The promote-from-within machine is intact. Special dividends every two to four years, paid from cash. The regular dividend keeps climbing. Warehouses funded from operating cash flow, no empire-building. The deduction: the directors and officers as a group own about 0.2% of the company. It’s the one Buffett box Costco doesn’t check — the people running it don’t eat much of their own cooking.

Financial Health: 23/25. Revenue and earnings up every single year. Net margins creeping from 2.6% to 3.0%. Return on invested capital between 37% and 41% — an absurd number for a retailer. Free cash flow growing from $6.8B to $9.4B in three years. Twenty billion in cash against a debt-to-equity ratio of 0.17. This is a fortress; there’s no other word.

Valuation: 10/25. And here's where the framework earns its keep. Forty-four times trailing earnings. A free-cash-flow yield around 2.3%: for every $100 you invest, the business throws off about $2.30 a year in free cash. Run the math backwards: to earn a 10% yearly return from today's price, Costco would need to grow free cash flow roughly 11% to 15% a year for a decade, and still trade at a premium multiple at the end. Its recent history is about 12%. So the price already assumes the best stretch in its history simply continues for ten more years. Meanwhile the highest-margin line in the entire company, membership fees, roughly half of operating income, just slowed from 14% growth to 7.3% (partly the anniversary of the 2024 fee hike, but still). The stock is flat over the past year despite 14% reported earnings growth (closer to 12% excluding a one-time tariff refund), which tells you the market is already shrinking the multiple. Great company. Priced for perfection.

Red-flag check: 0 of 5. Accounting manipulation: no. Management integrity issues: no. Structural industry decline: no. Debt distress: no, a debt-to-equity ratio of 0.17 and about $20 billion in cash. Excessive customer concentration: no, it has 84.1 million paid memberships. (One to watch: margins of about 3% leave little room for mistakes, and membership-fee growth is slowing.) No cap applies.

Verdict: 75/100 — GREAT COMPANY. WRONG PRICE. First score on the board, and it shows how the framework works: quality and price are graded separately. The framework loved the company, 65 of 75 possible quality points, and still said no. Valuation earned 10 of 25, because the price already counts on years of things going right, so there's nothing left over for you. That's not a bug. That's the product.

The system lesson: "It's far better to buy a wonderful company at a fair price than a fair company at a wonderful price." Most investors ask one question: is this a good company? That's three-quarters of the question. The fourth quarter, at what price?, is where returns are actually made, and it's the quarter emotion destroys. Nobody needs a framework to tell them Costco is excellent. Everybody needs a framework that can look at excellence and say "not yet." Patience isn't the absence of a decision. It's the decision.

Disclosure: The author does not own shares of Costco (COST) as of publication.

The Iowa Investor is education, not financial advice. Every score reflects the framework’s judgment, not a recommendation. Do your own work.

The fine print: The Scorecard is published by Iowa Investor (KEOWA, LLC) for educational purposes only. Nothing in this newsletter is personalized investment advice or a recommendation to buy or sell any security. Scores are opinion, built from public information believed reliable but not guaranteed, and are not predictions of future results. The author may hold positions in companies mentioned here; any position in the featured company is disclosed in each issue. Investing involves risk, including loss of principal. Do your own research or consult a licensed advisor before making investment decisions.

Data as of Sep 25, 2026 close; fundamentals through Q4 FY2026 (reported Sep 24, 2026). Company figures from Costco's filings; the markup figure and some others come from public reporting, not filings. Score: Moat 26, Management 16, Financial Health 23, Valuation 10 — 75/100 GREAT COMPANY. WRONG PRICE.