Benchmarks & ETF · band window Nov 13 – Nov 20
SPDR S&P 500 ETF
ETF · US · Benchmark
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 SPY's 115 settled weeks, 79 (68.7%) finished inside ±1σ on the week's last close. 20 (17.4%) finished at or above +1σ and 16 (13.9%) 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 ±2.2% is 1.19× the symbol's median width of ±1.9% and ranks #179 widest of 184 tracked symbols. That is close to its usual width.
The week that finished furthest from its anchor closed 2025-04-04 at −2.86σ. The most recent finish outside was 2026-11-06 (−1.12σ), followed by 1 straight weeks inside.
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 |
|---|---|---|---|---|
| +0.79σ | — | — | — | |
| −1.12σ | +2.58% | — | — | |
| −0.24σ | −2.70% | −0.19% | — | |
| −0.22σ | −0.56% | −3.25% | — | |
| −1.48σ | −0.43% | −0.99% | −1.18% | |
| +0.80σ | −1.97% | −2.39% | −5.56% | |
| −0.14σ | +1.16% | −0.83% | −1.81% | |
| +0.91σ | −0.22% | +0.94% | −1.48% | |
| −0.19σ | +1.27% | +1.04% | +0.20% | |
| −0.58σ | −0.34% | +0.92% | +1.87% | |
| +0.08σ | −0.77% | −1.10% | −0.07% | |
| +0.30σ | +0.11% | −0.66% | +0.26% |
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 runs with the move, so levels break faster than they hold.
+1σ $770.84 · −1σ $737.66 — outside the published strike window ($743.00–$766.00), so not drawn on the ladder above.
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.