STX max pain, gamma exposure (GEX) & options open interest
As of close · rank #351 by open interest · 1,392 sessions of history since Dec 1, 2020
STX's nearest-expiration max pain is 890.00 for 2026-10-09, its GEX flip is 862.28, net GEX is -565,553, its put/call open-interest ratio is 1.63. 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.
Strongest relative signals: volume/OI 0.39 · 7d expected move +9.1% · IV rank 86
STX closed 23.6% below its gamma max of 1,049.51. It is 1.2% above the delta neutral price of 838.73. Total open interest is 244,201, -6.1% versus the previous session. Its options catalyst-intensity score is 53.0 out of 100, led by volume/OI 0.39, 7d expected move +9.1%, IV rank 86. 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 | -7,318 contracts · -7.3% |
| Put OI change, 1 session | -8,647 contracts · -5.4% |
| Call minus put OI growth, 1 session | -1.9 pp |
| Call OI change, 5 sessions | +2,721 contracts · +3.0% |
| Put OI change, 5 sessions | +3,172 contracts · +2.1% |
| Call minus put OI growth, 5 sessions | +0.9 pp |
| Daily call OI change surprise | -1.02σ (249 prior changes) |
| Daily put OI change surprise | -1.04σ (249 prior changes) |
| Daily call-minus-put growth surprise | -0.60σ (249 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 above gamma max 33 completed Day +10 paths · latest Mar 19, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 33 | +0.9% | -0.6% to +1.9% | 58% | -0.1% to +1.3% | 0.0% |
| Day +2 | 33 | +0.7% | -1.1% to +2.4% | 67% | +0.1% to +1.4% | +0.1% |
| Day +3 | 33 | +1.3% | -1.5% to +3.0% | 64% | -0.0% to +2.3% | 0.0% |
| Day +4 | 33 | +1.1% | -2.0% to +4.6% | 61% | -0.3% to +3.1% | 0.0% |
| Day +5 | 33 | +1.3% | -3.8% to +4.1% | 58% | -1.8% to +3.4% | 0.0% |
| Day +6 | 33 | +1.8% | -3.7% to +5.5% | 58% | -3.1% to +2.8% | 0.0% |
| Day +7 | 33 | +1.5% | -4.6% to +4.4% | 55% | -3.4% to +2.5% | 0.0% |
| Day +8 | 33 | +1.6% | -4.1% to +4.2% | 58% | -1.9% to +3.8% | 0.0% |
| Day +9 | 33 | +2.6% | -4.0% to +5.8% | 55% | -1.6% to +3.6% | 0.0% |
| Day +10 | 33 | +1.1% | -4.9% to +8.3% | 55% | -2.4% to +5.7% | 0.0% |
Crosses below gamma max 33 completed Day +10 paths · latest Dec 12, 2025
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 33 | +0.3% | -0.8% to +0.8% | 55% | -0.4% to +0.6% | 0.0% |
| Day +2 | 33 | +0.4% | -1.3% to +1.6% | 64% | -0.5% to +1.2% | 0.0% |
| Day +3 | 33 | +0.2% | -3.5% to +2.3% | 55% | -2.3% to +1.8% | 0.0% |
| Day +4 | 33 | +1.2% | -2.8% to +2.8% | 64% | -0.0% to +2.4% | 0.0% |
| Day +5 | 33 | +1.6% | -2.8% to +3.8% | 64% | -0.4% to +2.6% | 0.0% |
| Day +6 | 33 | +1.9% | -2.0% to +4.4% | 61% | -1.1% to +3.8% | 0.0% |
| Day +7 | 33 | +1.7% | -1.9% to +5.0% | 61% | -0.3% to +3.4% | 0.0% |
| Day +8 | 33 | +2.3% | -2.8% to +4.7% | 61% | -1.1% to +4.0% | 0.0% |
| Day +9 | 33 | +0.8% | -2.8% to +6.4% | 55% | -1.8% to +4.3% | 0.0% |
| Day +10 | 33 | +0.2% | -2.2% to +7.9% | 52% | -1.6% to +2.9% | 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 | 2% |
| Gamma max crosses | 10 |
| Delta neutral crosses | 20 |
| Prior-year sessions closer to gamma max | 88.1% of 252 |
| Prior-year sessions closer to delta neutral | 6.3% of 252 |
| Open interest percentile (1y) | 81th |
| Daily open interest change versus prior year | -1.06σ (-15,965 contracts; 252 prior changes) |
| Open interest change, 5 sessions | +2.5% |
| Open interest change, 21 sessions | -10.7% |
| History available | Dec 1, 2020 → Oct 2, 2026 |
Recent crosses
- closed above delta neutral at 858.79 vs 819.93 (+4.5%)
- closed below delta neutral at 805.55 vs 817.46 (-1.5%)
- closed above delta neutral at 849.28 vs 827.27 (+2.6%)
- closed below delta neutral at 816.64 vs 823.43 (-0.8%)
- closed above delta neutral at 846.37 vs 829.81 (+2.0%)
- closed below delta neutral at 794.65 vs 816.71 (-2.8%)
- closed above delta neutral at 850.24 vs 842.51 (+0.9%)
- closed below delta neutral at 832.56 vs 837.80 (-0.6%)
- closed above delta neutral at 764.43 vs 758.08 (+0.8%)
- closed below delta neutral at 747.30 vs 754.45 (-1.0%)
In today's screens
Neighbours by open interest
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Canonical source: https://halfonadouble.com/stock/STX
Questions people ask about STX
Where is STX's gamma max today?
As of Oct 2, 2026, the gamma max for STX is 1,049.51, +23.6% from the 848.99 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 STX above or below its delta neutral price?
STX closed above delta neutral: 848.99 against a delta neutral price of 838.73. The delta neutral price is where the summed delta of the whole chain is zero; the definition.
How much open interest does STX have?
244,201 contracts of open interest across 2,629 listed contracts on Oct 2, 2026, -6.1% 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.