Defensive · band window Nov 13 – Nov 20
COSTCO WHOLESALE
Equity · US · Defensive
Inside the expected range. No statistical dislocation.
Price basis: 2026-11-13 US regular-session close · candle and GEX OI timestamps are shown separately on the chart.
This link opens the latest data for this symbol.
30-minute candles · US regular session (ET)
2024-09-06 – 2026-11-13 · measured on each week's last regular-session close
Of COST's 115 settled weeks, 84 (73.0%) finished inside ±1σ on the week's last close. 16 (13.9%) finished at or above +1σ and 15 (13.0%) at or below −1σ. A normal distribution puts 68.3% inside and about 15.9% beyond each side. Given 115 weeks, the gap from theory is within what chance alone produces.
This week's band of ±3.0% is 1.08× the symbol's median width of ±2.8% and ranks #163 widest of 184 tracked symbols. That is close to its usual width.
The week that finished furthest from its anchor closed 2026-01-09 at +3.26σ. The latest week (2026-11-13) finished outside, at +1.47σ.
Past shares do not predict next week. A week that broke the band intraday but closed back inside counts as inside. The universe-wide measurement and its method are in the weekly ±1σ coverage study.
Each date uses its own weekly band · settled bands are retained
Click or tap the chart to see prices.
Price ($)
Shading: historic ±1σ · dots: close at or beyond the band
Prices shown 2025-11-13–2026-11-13 · 252 sessions
Sigma bands: 252/252 sessions
| Close date | Sigma | +1W | +2W | +4W |
|---|---|---|---|---|
| +1.47σ | — | — | — | |
| +1.32σ | +5.02% | — | — | |
| +0.34σ | +4.08% | +9.30% | — | |
| +0.55σ | +0.89% | +5.01% | — | |
| +1.91σ | +1.44% | +2.34% | +11.86% | |
| +1.12σ | +4.46% | +5.96% | +11.26% | |
| −0.08σ | +2.85% | +7.44% | +9.95% | |
| +0.69σ | −0.23% | +2.62% | +8.73% | |
| −0.45σ | +3.07% | +2.83% | +10.48% | |
| −0.51σ | −1.05% | +1.99% | +4.66% | |
| −1.29σ | −1.20% | −2.23% | +0.54% | |
| −0.09σ | −3.14% | −4.30% | −2.40% |
Close-to-close price changes, excluding dividends and costs. — means future or unavailable. Predictive value is still under validation.
Dealer gamma stacked at each strike. The dashed lines are this week's ±1σ edges, so whether a thick strike and a band edge land on the same price is readable in one view.
Hedging leans against the move, so the strikes below tend to hold.
All expirations, strikes within ±10% of spot. Open interest settles once a day, so these levels move on the same cadence as the σ band.
A daily snapshot, not a live quote. Prices are taken as the upstream feed supplies them.