# GM: options-positioning snapshot

Canonical: https://halfonadouble.com/stock/GM
Data through: 2026-10-02 close
Publisher: Half on a Double

| Published field | Value |
| --- | --- |
| Close (USD/share) | 78.27 |
| Delta neutral (USD/share) | 75.89 |
| Gamma neutral (USD/share) | 71.04 |
| Gamma max (USD/share) | 88.83 |
| Open interest (contracts) | 280,349 |
| Nearest-expiration max pain (USD/share) | 81.00 (2026-10-09) |
| All-expiration max pain (USD/share) | 77.50 |
| Net gamma exposure | 6,677,209 |
| Confirmed GEX flip (USD/share) | 71.04 |
| Call wall (USD/share) | 80.00 |
| Put wall (USD/share) | 80.00 |
| Put/call open-interest ratio | 0.68 |
| Options catalyst-intensity score (0–100) | 38.8 |
| Options directional score (-100 to +100) | -11.3 |
| IV rank | 83.5 |
| Front ATM IV | +33.1% |
| Front-minus-back IV | -5.7 pp |
| Front expected move | +4.6% |
| Front ATM straddle / spot | +3.2% |
| Front 25-delta risk reversal | 2.1 pp |
| Call OI change, 1 session | -8,161 contracts · -4.7% |
| Put OI change, 1 session | -3,752 contracts · -3.2% |
| Call minus put OI growth, 1 session | -1.5 pp |
| Call OI change, 5 sessions | +15,039 contracts · +9.9% |
| Put OI change, 5 sessions | +6,027 contracts · +5.6% |
| Call minus put OI growth, 5 sessions | +4.3 pp |
| Daily call OI change surprise | -0.53σ (252 prior changes) |
| Daily put OI change surprise | -0.26σ (252 prior changes) |
| Daily call-minus-put growth surprise | -0.59σ (252 prior changes) |
| Daily open interest change (contracts) | -11,913 |
| Daily open interest change z-score (prior 252) | -0.41σ (252 prior changes) |
| Gamma max distance from close | +13.5% |
| Delta neutral distance from close | -3.0% |
| Prior-year sessions closer to gamma max | 99.2% of 252 |
| Prior-year sessions closer to delta neutral | 10.3% of 252 |

## Historical gamma-max cross outcomes

| Direction | Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| above | Day +1 | 32 | -0.1% | -1.5% to +1.4% | 50% | -1.0% to +1.0% | 0.0% |
| above | Day +3 | 32 | -0.4% | -1.6% to +1.6% | 47% | -1.0% to +1.3% | 0.0% |
| above | Day +5 | 32 | -0.2% | -3.0% to +2.3% | 47% | -2.7% to +0.9% | 0.0% |
| above | Day +10 | 32 | -0.5% | -5.2% to +3.3% | 47% | -4.3% to +1.9% | 0.0% |
| below | Day +1 | 31 | +0.0% | -0.8% to +0.7% | 52% | -0.6% to +0.5% | 0.0% |
| below | Day +3 | 31 | -0.7% | -1.9% to +1.1% | 39% | -1.6% to +0.8% | 0.0% |
| below | Day +5 | 31 | -0.6% | -3.2% to +1.4% | 45% | -2.5% to +0.5% | 0.0% |
| below | Day +10 | 31 | -2.1% | -4.2% to +2.6% | 39% | -3.5% to +0.6% | 0.0% |

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/GM.json)
- [Historical CSV](https://halfonadouble.com/api/v1/history/GM.csv)
- [Complete advanced analysis](https://halfonadouble.com/api/v1/analysis/GM.json?date=2026-10-02)

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).