Costco delivered a near-perfect Q2 FY2026 with revenue accelerating to +9.1% YoY ($68.2B), EPS up 14% to $4.58, and core-on-core margins expanding 22 basis points across all three merchandise categories. The worldwide membership renewal rate stabilized at 89.7% — flat quarter-over-quarter, breaking the declining trajectory our analysis identified as the single most important leading indicator. The stock traded flat at ~$980 after hours — which is itself a confirmation of the DEMANDING expectations embedded in the ~52x P/E. All 11 signal assessments hold. Classification remains MODERATE_BULL.
What Was Confirmed
Revenue growth accelerated to +9.1% (from 8.2% FY2025). Traffic held at +3.1% worldwide. February monthly sales +9.5%. Revenue grew through tariff regime change from IEEPA to new 150-day global tariffs.
Core-on-core margins +22bps broad-based. Operations SG&A improved 2bps ex gas — productivity improvements fully offset wage investments. Digital comp +22.6% with AI-powered pharmacy and automated pay stations in pilot.
Moat trajectory upgraded from “Stable (leaning widening)” to “Widening.” Two consecutive quarters of margin expansion, creative infill formats (parking decks, residential above) extending US runway. No competitive displacement from Sam's Club.
Stock flat at $980 after a quarter where every metric beat or matched prior trends. This is what DEMANDING looks like in practice: requirements being met generates no incremental upside.
Monitoring Trigger Updates
Market Resolution & Prediction Updates
Prediction Shifts
| Market | Before | After | Shift |
|---|---|---|---|
| Healthcare > sales 3+ quarters | 55% | 18% | -37pp |
| Gross margin < 12.5% | 17% | 10% | -7pp |
| Renewal < 88% by Q4 | 6% | 3% | -3pp |
| P/E < 45x before Dec 2026 | 28% | 26% | -2pp |
All four updated markets shifted downward — meaning the earnings data reduced the probability of negative scenarios across the board. The largest shift was healthcare costs (-37pp), where Q2's operations SG&A improvement effectively broke the consecutive-quarter requirement. Three legislative/enforcement markets (tariff legislation, Section 122 expiry, LPP enforcement) were not updated as they are not informed by quarterly earnings data.
The Perfection Trap Persists
Q2 was a near-ideal quarter. Revenue accelerated. Margins expanded. Renewal rates stabilized. Healthcare headwinds didn't materialize. Digital growth continued to accelerate. New warehouse formats opened previously inaccessible markets. And the stock was flat.
This is the defining tension of the COST investment case. The business is executing at or above the upper bound of what the ~52x P/E requires. But meeting those requirements generates zero incremental upside — because the market has already priced this level of execution as the baseline expectation.
Our Myth Meter's DEMANDING assessment was confirmed by the most direct evidence possible: a quarter that beat every operational threshold produced a 0% stock price reaction. The question for Costco investors remains unchanged from our original analysis: this is an exceptional business, but does the current price already fully reflect that quality?
What to Watch Next
- Q3 FY2026 (May 2026): Will healthcare costs resurface? Q2's silence was encouraging but one quarter doesn't establish a trend. The healthcare market resolves in June.
- Tariff regime (July 2026): 150-day global tariffs expire. Congressional action or extension determines whether regulatory exposure escalates. Two markets track this.
- Renewal rate trajectory: Stabilization at 89.7% is positive but needs continuation. If the rate resumes declining, the 88% monitoring trigger re-engages.
- Multiple compression: At 26% probability, our ensemble still sees meaningful chance of P/E dropping below 45x before year-end — driven primarily by exogenous macro risk, not operational deterioration.