GM max pain, gamma exposure (GEX) & options open interest
As of close · rank #317 by open interest · 1,394 sessions of history since Dec 1, 2020
GM's nearest-expiration max pain is 81.00 for 2026-10-09, its GEX flip is 71.04, net GEX is 6,677,209, its put/call open-interest ratio is 0.68. These are whole-chain derived aggregates as of Oct 2, 2026 close.
Whole-chain analytics
Derived after the close from the same dated options chain. Signed gamma exposure uses calls positive and puts negative; it is a model convention, not observed dealer inventory.
Advanced options analysis
Complete derived analysis from the dated chain, normalized where possible for comparison across tickers. Catalyst intensity measures unusual pricing and activity; it does not identify an event, predict direction, or establish that an investment is attractive.
GM closed 13.5% below its gamma max of 88.83. It is 3.0% above the delta neutral price of 75.89. Total open interest is 280,349, -4.1% versus the previous session. Its options catalyst-intensity score is 38.8 out of 100. What gamma max means · What delta neutral means
Call versus put open interest changes
Growth compares outstanding contracts on each side. A positive growth gap favors calls; a negative gap favors puts. Standardized surprises compare each measure with its own prior history. These describe the OI balance, not IV skew or buying direction.
| Measure | Value |
|---|---|
| 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) |
History
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Analysis visualizations
Derived from the 2026-10-02 options chain. Select an analysis to explore its chart.
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Gamma walls
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What followed prior gamma-max crosses?
Each historical path starts at 0% on the cross date and follows the close for ten subsequent trading sessions. Cohorts use the same direction as labelled and require gamma max to be within 10% of the close on both crossing sessions.
Crosses below gamma max 31 completed Day +10 paths · latest Jul 30, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 31 | +0.0% | -0.8% to +0.7% | 52% | -0.6% to +0.5% | 0.0% |
| Day +2 | 31 | -0.7% | -1.7% to +1.9% | 45% | -1.1% to +1.3% | 0.0% |
| Day +3 | 31 | -0.7% | -1.9% to +1.1% | 39% | -1.6% to +0.8% | 0.0% |
| Day +4 | 31 | -0.4% | -2.5% to +1.1% | 42% | -1.9% to +0.6% | 0.0% |
| Day +5 | 31 | -0.6% | -3.2% to +1.4% | 45% | -2.5% to +0.5% | 0.0% |
| Day +6 | 31 | -1.4% | -3.6% to +1.7% | 42% | -2.2% to +0.8% | 0.0% |
| Day +7 | 31 | -0.9% | -3.6% to +2.1% | 35% | -2.3% to +0.6% | 0.0% |
| Day +8 | 31 | -2.0% | -4.3% to +1.4% | 35% | -2.5% to +0.5% | 0.0% |
| Day +9 | 31 | -2.0% | -3.8% to +1.4% | 35% | -2.9% to +0.6% | 0.0% |
| Day +10 | 31 | -2.1% | -4.2% to +2.6% | 39% | -3.5% to +0.6% | 0.0% |
Crosses above gamma max 32 completed Day +10 paths · latest Jul 28, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 32 | -0.1% | -1.5% to +1.4% | 50% | -1.0% to +1.0% | 0.0% |
| Day +2 | 32 | -0.2% | -1.7% to +0.7% | 44% | -1.0% to +0.4% | 0.0% |
| Day +3 | 32 | -0.4% | -1.6% to +1.6% | 47% | -1.0% to +1.3% | 0.0% |
| Day +4 | 32 | -1.0% | -2.4% to +2.5% | 44% | -2.0% to +0.6% | 0.0% |
| Day +5 | 32 | -0.2% | -3.0% to +2.3% | 47% | -2.7% to +0.9% | 0.0% |
| Day +6 | 32 | -0.5% | -3.1% to +2.8% | 41% | -2.8% to +1.5% | 0.0% |
| Day +7 | 32 | -1.7% | -4.6% to +3.1% | 44% | -4.2% to +1.3% | 0.0% |
| Day +8 | 32 | -0.9% | -4.5% to +2.8% | 44% | -4.0% to +2.0% | 0.0% |
| Day +9 | 32 | -0.3% | -4.0% to +3.1% | 47% | -2.7% to +2.4% | 0.0% |
| Day +10 | 32 | -0.5% | -5.2% to +3.3% | 47% | -4.3% to +1.9% | 0.0% |
Returns are close-to-close after the labelled number of subsequent trading sessions. The confidence floor is the closest-to-zero bound of the order-statistic median interval; it is zero when that interval spans zero. Its coverage is nominally at least 90% under independent observations. Historical paths can overlap, so the interval and floor are descriptive uncertainty guides rather than formal coverage guarantees. Historical, not a forecast.
Last 252 sessions
| Sessions closed above gamma max | 7% |
| Gamma max crosses | 22 |
| Delta neutral crosses | 0 |
| Prior-year sessions closer to gamma max | 99.2% of 252 |
| Prior-year sessions closer to delta neutral | 10.3% of 252 |
| Open interest percentile (1y) | 4th |
| Daily open interest change versus prior year | -0.41σ (-11,913 contracts; 252 prior changes) |
| Open interest change, 5 sessions | +8.1% |
| Open interest change, 21 sessions | -14.1% |
| History available | Dec 1, 2020 → Oct 2, 2026 |
Recent crosses
- closed below gamma max at 88.40 vs 90.39 (-2.3%)
- closed above gamma max at 90.30 vs 88.06 (+2.5%)
- closed below gamma max at 80.67 vs 80.93 (-0.3%)
- closed above gamma max at 82.13 vs 80.91 (+1.5%)
- closed below gamma max at 83.24 vs 85.43 (-2.6%)
- closed above gamma max at 84.18 vs 83.79 (+0.5%)
- closed below gamma max at 84.90 vs 87.56 (-3.1%)
- closed above gamma max at 86.38 vs 86.28 (+0.1%)
- closed below gamma max at 82.87 vs 85.63 (-3.3%)
- closed above gamma max at 85.13 vs 84.97 (+0.2%)
In today's screens
Neighbours by open interest
Cite or embed this snapshot
Share the dated 1600×840 image or cite this canonical page. The card contains public derived aggregates, not contract-level quotes.
Canonical source: https://halfonadouble.com/stock/GM
Questions people ask about GM
Where is GM's gamma max today?
As of Oct 2, 2026, the gamma max for GM is 88.83, +13.5% from the 78.27 close. Gamma max is the underlying price at which the summed gamma of every open contract is largest; how it is computed and why it matters.
Is GM above or below its delta neutral price?
GM closed above delta neutral: 78.27 against a delta neutral price of 75.89. The delta neutral price is where the summed delta of the whole chain is zero; the definition.
How much open interest does GM have?
280,349 contracts of open interest across 594 listed contracts on Oct 2, 2026, -4.1% versus the previous session. What open interest measures.
Levels are recomputed after every trading day from licensed end-of-day options data; only derived aggregates are published. Methodology · Data and licence · Not investment advice.