OPEN max pain, gamma exposure (GEX) & options open interest
As of close · rank #112 by open interest · 1,348 sessions of history since Dec 21, 2020
OPEN's nearest-expiration max pain is 2.50 for 2026-10-09, net GEX is 20,860,957, its put/call open-interest ratio is 0.15. 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: IV rank 100 · 25Δ risk reversal 28.5 pp · 7d expected move +9.3%
OPEN closed 8.2% below its gamma max of 2.64. It is 40.3% above the delta neutral price of 1.46. Total open interest is 880,698, -2.6% versus the previous session. Its options catalyst-intensity score is 42.5 out of 100, led by IV rank 100, 25Δ risk reversal 28.5 pp, 7d expected move +9.3%. 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 | -20,136 contracts · -2.6% |
| Put OI change, 1 session | -3,817 contracts · -3.2% |
| Call minus put OI growth, 1 session | +0.6 pp |
| Call OI change, 5 sessions | +13,703 contracts · +1.8% |
| Put OI change, 5 sessions | +1,866 contracts · +1.6% |
| Call minus put OI growth, 5 sessions | +0.2 pp |
| Daily call OI change surprise | -0.10σ (250 prior changes) |
| Daily put OI change surprise | +0.01σ (250 prior changes) |
| Daily call-minus-put growth surprise | -0.01σ (250 prior changes) |
History
Hover for valuesDrag to panScroll to zoomClick a series to hide it ← → step a session+ − zoomTouch: swipe to pan, pinch to zoom, hold for the crosshair
Analysis visualizations
Derived from the 2026-10-02 options chain. Select an analysis to explore its chart.
No matching visualizations.
Gamma walls
Chart loads when this section is in view.
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 34 completed Day +10 paths · latest Jul 9, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 34 | -0.7% | -4.1% to +2.4% | 47% | -1.6% to +1.3% | 0.0% |
| Day +2 | 34 | -2.5% | -7.4% to +2.2% | 38% | -5.0% to +1.3% | 0.0% |
| Day +3 | 34 | -4.0% | -10.0% to +3.6% | 35% | -8.0% to +2.0% | 0.0% |
| Day +4 | 34 | -3.6% | -9.7% to +2.6% | 32% | -7.5% to -1.2% | -1.2% |
| Day +5 | 34 | -2.9% | -9.5% to +3.2% | 29% | -8.0% to -0.9% | -0.9% |
| Day +6 | 34 | -5.4% | -15.7% to +5.3% | 41% | -12.0% to +1.3% | 0.0% |
| Day +7 | 34 | -6.0% | -12.8% to +6.1% | 38% | -11.4% to +1.5% | 0.0% |
| Day +8 | 34 | -6.7% | -12.1% to +10.2% | 35% | -9.3% to +0.5% | 0.0% |
| Day +9 | 34 | -5.7% | -11.4% to +12.2% | 38% | -8.4% to +5.9% | 0.0% |
| Day +10 | 34 | -6.6% | -14.4% to +11.4% | 32% | -11.8% to -0.9% | -0.9% |
Crosses below gamma max 36 completed Day +10 paths · latest Jun 2, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 36 | -1.0% | -4.3% to +1.1% | 39% | -2.0% to +0.2% | 0.0% |
| Day +2 | 36 | -2.6% | -8.2% to +3.5% | 42% | -6.5% to +0.2% | 0.0% |
| Day +3 | 36 | -3.8% | -8.3% to -0.7% | 22% | -6.0% to -1.7% | -1.7% |
| Day +4 | 36 | -4.8% | -8.9% to +2.7% | 31% | -8.1% to -1.6% | -1.6% |
| Day +5 | 36 | -2.9% | -12.3% to +4.4% | 33% | -9.3% to -0.4% | -0.4% |
| Day +6 | 36 | -4.0% | -10.3% to +3.1% | 28% | -6.4% to -0.6% | -0.6% |
| Day +7 | 36 | -1.6% | -10.2% to +9.4% | 42% | -7.6% to +1.0% | 0.0% |
| Day +8 | 36 | -1.3% | -8.3% to +14.5% | 44% | -6.3% to +8.0% | 0.0% |
| Day +9 | 36 | -2.3% | -11.2% to +11.6% | 44% | -8.9% to +9.1% | 0.0% |
| Day +10 | 36 | -4.2% | -12.2% to +10.1% | 39% | -8.9% to +3.8% | 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 | 4% |
| Gamma max crosses | 16 |
| Delta neutral crosses | 2 |
| Prior-year sessions closer to gamma max | 21.8% of 252 |
| Prior-year sessions closer to delta neutral | 95.2% of 252 |
| Open interest percentile (1y) | 54th |
| Daily open interest change versus prior year | -0.08σ (-23,953 contracts; 252 prior changes) |
| Open interest change, 5 sessions | +1.8% |
| Open interest change, 21 sessions | +0.3% |
| History available | Dec 21, 2020 → Oct 2, 2026 |
Recent crosses
- closed below gamma max at 4.76 vs 5.34 (-12.2%)
- closed above gamma max at 5.30 vs 5.28 (+0.4%)
- closed below gamma max at 5.42 vs 5.54 (-2.3%)
- closed above gamma max at 5.31 vs 5.30 (+0.2%)
- closed below gamma max at 5.04 vs 5.21 (-3.5%)
- closed above gamma max at 5.07 vs 5.05 (+0.4%)
- closed below gamma max at 4.53 vs 4.89 (-7.9%)
- closed above gamma max at 4.58 vs 4.56 (+0.4%)
- closed below gamma max at 5.29 vs 5.52 (-4.4%)
- closed above gamma max at 5.27 vs 5.07 (+3.9%)
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/OPEN
Questions people ask about OPEN
Where is OPEN's gamma max today?
As of Oct 2, 2026, the gamma max for OPEN is 2.64, +8.2% from the 2.44 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 OPEN above or below its delta neutral price?
OPEN closed above delta neutral: 2.44 against a delta neutral price of 1.46. The delta neutral price is where the summed delta of the whole chain is zero; the definition.
How much open interest does OPEN have?
880,698 contracts of open interest across 232 listed contracts on Oct 2, 2026, -2.6% 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.