GRPN max pain, gamma exposure (GEX) & options open interest
As of close · rank #505 by open interest · 1,394 sessions of history since Dec 1, 2020
GRPN's nearest-expiration max pain is 15.00 for 2026-10-16, its GEX flip is 2.46, net GEX is 5,746,298, its put/call open-interest ratio is 0.28. 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: 25Δ risk reversal -200.8 pp · 14d expected move +13.5% · smile convexity -15.9 pp
GRPN closed 13.7% below its gamma max of 21.95. It is 30.3% above the delta neutral price of 13.46. Total open interest is 142,472, +0.1% versus the previous session. Its options catalyst-intensity score is 49.2 out of 100, led by 25Δ risk reversal -200.8 pp, 14d expected move +13.5%, smile convexity -15.9 pp. 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 | +1 contracts · +0.0% |
| Put OI change, 1 session | +74 contracts · +0.2% |
| Call minus put OI growth, 1 session | -0.2 pp |
| Call OI change, 5 sessions | +3,534 contracts · +3.3% |
| Put OI change, 5 sessions | +487 contracts · +1.6% |
| Call minus put OI growth, 5 sessions | +1.7 pp |
| Daily call OI change surprise | -0.02σ (252 prior changes) |
| Daily put OI change surprise | +0.08σ (252 prior changes) |
| Daily call-minus-put growth surprise | -0.18σ (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 46 completed Day +10 paths · latest Jul 29, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 46 | -0.3% | -2.8% to +2.2% | 43% | -1.9% to +1.1% | 0.0% |
| Day +2 | 46 | +1.3% | -4.9% to +5.0% | 57% | -1.3% to +3.0% | 0.0% |
| Day +3 | 46 | +1.1% | -3.6% to +5.2% | 57% | -2.1% to +2.4% | 0.0% |
| Day +4 | 46 | +2.5% | -2.4% to +9.3% | 65% | +0.2% to +5.3% | +0.2% |
| Day +5 | 46 | +3.1% | -6.7% to +9.6% | 65% | +0.3% to +6.1% | +0.3% |
| Day +6 | 46 | +2.0% | -6.7% to +9.2% | 59% | -1.9% to +5.8% | 0.0% |
| Day +7 | 46 | +4.2% | -3.9% to +13.6% | 63% | -0.7% to +8.1% | 0.0% |
| Day +8 | 46 | +4.0% | -3.3% to +14.5% | 65% | +0.2% to +11.1% | +0.2% |
| Day +9 | 46 | +6.7% | -9.2% to +15.5% | 65% | +0.4% to +12.0% | +0.4% |
| Day +10 | 46 | +7.0% | -8.4% to +18.2% | 63% | -2.4% to +12.2% | 0.0% |
Crosses above gamma max 47 completed Day +10 paths · latest Jul 28, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 47 | -0.1% | -4.3% to +2.9% | 49% | -2.6% to +1.5% | 0.0% |
| Day +2 | 47 | -0.3% | -4.3% to +3.7% | 49% | -2.4% to +2.8% | 0.0% |
| Day +3 | 47 | +1.4% | -4.3% to +6.6% | 55% | -1.8% to +2.9% | 0.0% |
| Day +4 | 47 | +0.6% | -5.9% to +8.2% | 53% | -1.9% to +4.3% | 0.0% |
| Day +5 | 47 | +0.6% | -5.4% to +10.7% | 55% | -0.6% to +6.2% | 0.0% |
| Day +6 | 47 | +2.3% | -3.9% to +11.1% | 60% | -1.7% to +8.1% | 0.0% |
| Day +7 | 47 | +1.7% | -4.2% to +11.3% | 60% | -0.7% to +7.4% | 0.0% |
| Day +8 | 47 | +3.1% | -6.1% to +13.5% | 57% | -0.8% to +8.5% | 0.0% |
| Day +9 | 47 | +6.1% | -5.8% to +15.7% | 60% | -1.7% to +10.9% | 0.0% |
| Day +10 | 47 | +7.2% | -6.3% to +17.3% | 60% | -0.9% to +10.9% | 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 | 13% |
| Gamma max crosses | 12 |
| Delta neutral crosses | 10 |
| Prior-year sessions closer to gamma max | 45.6% of 252 |
| Prior-year sessions closer to delta neutral | 71.4% of 252 |
| Open interest percentile (1y) | 86th |
| Daily open interest change versus prior year | +0.01σ (75 contracts; 252 prior changes) |
| Open interest change, 5 sessions | +2.9% |
| Open interest change, 21 sessions | +2.7% |
| History available | Dec 1, 2020 → Oct 2, 2026 |
Recent crosses
- closed below gamma max at 27.22 vs 27.76 (-2.0%)
- closed above gamma max at 28.10 vs 27.74 (+1.3%)
- closed below gamma max at 25.81 vs 26.76 (-3.7%)
- closed above gamma max at 27.83 vs 25.84 (+7.2%)
- closed below gamma max at 28.58 vs 29.44 (-3.0%)
- closed above gamma max at 25.60 vs 24.89 (+2.8%)
- closed below gamma max at 23.54 vs 23.73 (-0.8%)
- closed above gamma max at 22.95 vs 21.57 (+6.0%)
- closed below gamma max at 18.91 vs 19.99 (-5.7%)
- closed above gamma max at 17.46 vs 16.46 (+5.7%)
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/GRPN
Questions people ask about GRPN
Where is GRPN's gamma max today?
As of Oct 2, 2026, the gamma max for GRPN is 21.95, +13.7% from the 19.31 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 GRPN above or below its delta neutral price?
GRPN closed above delta neutral: 19.31 against a delta neutral price of 13.46. The delta neutral price is where the summed delta of the whole chain is zero; the definition.
How much open interest does GRPN have?
142,472 contracts of open interest across 257 listed contracts on Oct 2, 2026, +0.1% 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.