# XSP: options-positioning snapshot

Canonical: https://halfonadouble.com/stock/XSP
Data through: 2026-10-16 close
Publisher: Half on a Double

| Published field | Value |
| --- | --- |
| Close (USD/share) | 765.94 |
| Delta neutral (USD/share) | 778.80 |
| Gamma neutral (USD/share) | 781.55 |
| Gamma max (USD/share) | 794.30 |
| Open interest (contracts) | 777,520 |
| Nearest-expiration max pain (USD/share) | 775.00 (2026-10-19) |
| All-expiration max pain (USD/share) | 770.00 |
| Net gamma exposure | -177,231,679 |
| Confirmed GEX flip (USD/share) | 781.55 |
| Call wall (USD/share) | 787.00 |
| Put wall (USD/share) | 725.00 |
| Put/call open-interest ratio | 2.35 |
| Options catalyst-intensity score (0–100) | 67.8 |
| Options directional score (-100 to +100) | -34.9 |
| IV rank | 100.0 |
| Front-minus-back IV | 4.7 pp |
| Front 25-delta risk reversal | 5.8 pp |
| Call OI change, 1 session | -12,876 contracts · -5.3% |
| Put OI change, 1 session | -81,374 contracts · -13.0% |
| Call minus put OI growth, 1 session | +7.7 pp |
| Call OI change, 5 sessions | +2,912 contracts · +1.3% |
| Put OI change, 5 sessions | -19,808 contracts · -3.5% |
| Call minus put OI growth, 5 sessions | +4.8 pp |
| Daily call OI change surprise | -1.90σ (242 prior changes) |
| Daily put OI change surprise | -3.99σ (242 prior changes) |
| Daily call-minus-put growth surprise | +2.80σ (242 prior changes) |
| Daily open interest change (contracts) | -94,250 |
| Daily open interest change z-score (prior 252) | -3.58σ (252 prior changes) |
| Gamma max distance from close | +3.7% |
| Delta neutral distance from close | +1.7% |
| Prior-year sessions closer to gamma max | 61.9% of 252 |
| Prior-year sessions closer to delta neutral | 69.0% of 252 |

## Historical gamma-max cross outcomes

| Direction | Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| above | Day +1 | 4 | +0.1% | -0.2% to +0.6% | 50% | — | – |
| above | Day +3 | 4 | +0.1% | -0.9% to +0.9% | 50% | — | – |
| above | Day +5 | 4 | -0.0% | -0.6% to +0.5% | 50% | — | – |
| above | Day +10 | 4 | +0.6% | +0.3% to +0.9% | 75% | — | – |
| below | Day +1 | 4 | -0.4% | -0.5% to -0.2% | 25% | — | – |
| below | Day +3 | 4 | -0.5% | -0.8% to -0.2% | 25% | — | – |
| below | Day +5 | 4 | -0.2% | -0.7% to -0.0% | 25% | — | – |
| below | Day +10 | 4 | -0.1% | -0.2% to +0.2% | 50% | — | – |

Returns are close-to-close after the labelled number of subsequent trading sessions. Cohorts require gamma max to be within 10% of the close on both crossing sessions. Historical windows can overlap and are not independent observations, so interval coverage is not guaranteed.

- [Machine-readable snapshot](https://halfonadouble.com/api/v1/tickers/XSP.json)
- [Historical CSV](https://halfonadouble.com/api/v1/history/XSP.csv)
- [Public aggregate analysis](https://halfonadouble.com/api/v1/analysis/XSP.json?date=2026-10-16&public_schema=4)

An em dash means unavailable, not zero. Values use the same display rounding as the HTML page. This is a current snapshot; full history and individual event paths are on the canonical page.

[Definitions and limitations](https://halfonadouble.com/methodology.md).