CAMS Research Note · August 12, 2026
COST: Durable Franchise, Macro Test
Costco's membership engine remains unusually durable, but its premium valuation makes the next evidence window more demanding than the quality narrative alone suggests.
U.S. and Canadian renewal stands at 92.2%, worldwide renewal at 89.7%, and executive memberships have reached 41.2 million. July demand was traffic-led, with worldwide traffic growth of 3.6% exceeding ex-fuel ticket growth of 2.9%. That supports the franchise thesis.
The tension is valuation and rates. At the August 12 reference, COST traded near 944.32 at roughly 41.7 times forward earnings while the 10-year Treasury yield was near 4.70%. July CPI and the September 24 earnings report will test whether membership durability, traffic and margin evidence can continue to support that premium.
The full Level 2+ review examines membership economics, the valuation debate, market structure, scenario conditions and the evidence that would change the thesis. Read the gated COST Deep Coverage Review or join CAMS Premium Research.
Market analysis, not personalized investment advice.
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