GFL max pain, gamma exposure (GEX) & options open interest
As of close · rank #253 by open interest · 1,394 sessions of history since Dec 1, 2020
GFL's nearest-expiration max pain is 40.00 for 2026-10-16, its GEX flip is 23.88, net GEX is 50,411,895, its put/call open-interest ratio is 0.10. 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: OI change 5.89σ · 14d expected move +15.9% · volume/OI 0.25
GFL closed 7.0% below its gamma max of 44.93. It is 23.5% above the delta neutral price of 32.11. Total open interest is 386,262, +13.5% versus the previous session. Its options catalyst-intensity score is 80.7 out of 100, led by OI change 5.89σ, 14d expected move +15.9%, volume/OI 0.25. 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 | +42,397 contracts · +13.8% |
| Put OI change, 1 session | +3,605 contracts · +11.0% |
| Call minus put OI growth, 1 session | +2.8 pp |
| Call OI change, 5 sessions | +131,134 contracts · +60.0% |
| Put OI change, 5 sessions | +15,345 contracts · +72.7% |
| Call minus put OI growth, 5 sessions | -12.8 pp |
| Daily call OI change surprise | +6.43σ (252 prior changes) |
| Daily put OI change surprise | +1.51σ (252 prior changes) |
| Daily call-minus-put growth surprise | — (129 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 32 completed Day +10 paths · latest Aug 31, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 32 | -0.1% | -0.6% to +0.9% | 47% | -0.4% to +0.4% | 0.0% |
| Day +2 | 32 | -0.3% | -0.7% to +0.8% | 41% | -0.7% to +0.7% | 0.0% |
| Day +3 | 32 | +0.0% | -1.3% to +1.3% | 50% | -0.7% to +0.7% | 0.0% |
| Day +4 | 32 | +0.3% | -0.9% to +1.3% | 56% | -0.6% to +0.5% | 0.0% |
| Day +5 | 32 | +0.2% | -1.3% to +1.4% | 53% | -0.9% to +0.7% | 0.0% |
| Day +6 | 32 | +0.6% | -0.8% to +2.7% | 59% | -0.3% to +1.6% | 0.0% |
| Day +7 | 32 | -0.1% | -1.5% to +2.6% | 50% | -1.2% to +2.2% | 0.0% |
| Day +8 | 32 | -0.1% | -1.4% to +2.3% | 47% | -1.1% to +1.3% | 0.0% |
| Day +9 | 32 | -0.1% | -2.2% to +2.4% | 44% | -1.8% to +1.6% | 0.0% |
| Day +10 | 32 | +0.2% | -1.4% to +3.0% | 53% | -1.1% to +2.4% | 0.0% |
Crosses above gamma max 33 completed Day +10 paths · latest Aug 28, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 33 | -0.1% | -1.0% to +1.0% | 48% | -0.7% to +0.5% | 0.0% |
| Day +2 | 33 | -0.7% | -1.2% to +0.6% | 39% | -1.1% to +0.1% | 0.0% |
| Day +3 | 33 | -0.9% | -1.4% to +1.2% | 45% | -1.3% to +0.6% | 0.0% |
| Day +4 | 33 | -0.6% | -2.0% to +1.5% | 36% | -1.6% to +0.2% | 0.0% |
| Day +5 | 33 | -0.6% | -1.9% to +2.1% | 45% | -1.4% to +1.4% | 0.0% |
| Day +6 | 33 | -0.5% | -2.7% to +3.0% | 42% | -1.1% to +1.5% | 0.0% |
| Day +7 | 33 | +0.2% | -1.9% to +2.3% | 55% | -1.0% to +1.1% | 0.0% |
| Day +8 | 33 | +0.3% | -2.2% to +2.3% | 58% | -1.4% to +1.7% | 0.0% |
| Day +9 | 33 | -0.2% | -1.3% to +2.7% | 48% | -1.0% to +1.2% | 0.0% |
| Day +10 | 33 | +0.3% | -1.8% to +1.9% | 52% | -1.5% to +1.4% | 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 | 6 |
| Delta neutral crosses | 15 |
| Prior-year sessions closer to gamma max | 26.2% of 252 |
| Prior-year sessions closer to delta neutral | 100.0% of 252 |
| Open interest percentile (1y) | 100th |
| Daily open interest change versus prior year | +5.89σ (46,002 contracts; 252 prior changes) |
| Open interest change, 5 sessions | +61.1% |
| Open interest change, 21 sessions | +1622.2% |
| History available | Dec 1, 2020 → Oct 2, 2026 |
Recent crosses
- closed below gamma max at 42.29 vs 43.15 (-2.0%)
- closed above gamma max at 42.83 vs 42.18 (+1.5%)
- closed below gamma max at 40.72 vs 42.11 (-3.4%)
- closed above gamma max at 41.05 vs 40.81 (+0.6%)
- closed below gamma max at 40.89 vs 46.24 (-13.1%)
- closed above gamma max at 40.61 vs 39.75 (+2.1%)
- closed above delta neutral at 34.72 vs 34.03 (+2.0%)
- closed below delta neutral at 33.76 vs 34.09 (-1.0%)
- closed above delta neutral at 34.32 vs 32.51 (+5.3%)
- closed below delta neutral at 34.88 vs 34.94 (-0.2%)
In today's screens
Neighbours by open interest
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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/GFL
Questions people ask about GFL
Where is GFL's gamma max today?
As of Oct 2, 2026, the gamma max for GFL is 44.93, +7.0% from the 41.98 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 GFL above or below its delta neutral price?
GFL closed above delta neutral: 41.98 against a delta neutral price of 32.11. The delta neutral price is where the summed delta of the whole chain is zero; the definition.
How much open interest does GFL have?
386,262 contracts of open interest across 111 listed contracts on Oct 2, 2026, +13.5% 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.