SERV max pain, gamma exposure (GEX) & options open interest
As of close · rank #395 by open interest · 523 sessions of history since Sep 3, 2024
SERV's nearest-expiration max pain is 5.00 for 2026-10-09, net GEX is 3,952,063, its put/call open-interest ratio is 0.51. 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 170.5 pp · 7d expected move +9.4%
SERV closed 8.0% below its gamma max of 4.99. It is 4.6% below the delta neutral price of 4.83. Total open interest is 210,214, -3.3% versus the previous session. Its options catalyst-intensity score is 52.0 out of 100, led by 25Δ risk reversal 170.5 pp, 7d expected move +9.4%. 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 | -5,528 contracts · -3.8% |
| Put OI change, 1 session | -1,587 contracts · -2.2% |
| Call minus put OI growth, 1 session | -1.6 pp |
| Call OI change, 5 sessions | +10,631 contracts · +8.3% |
| Put OI change, 5 sessions | +5,565 contracts · +8.5% |
| Call minus put OI growth, 5 sessions | -0.2 pp |
| Daily call OI change surprise | -0.52σ (252 prior changes) |
| Daily put OI change surprise | -0.35σ (252 prior changes) |
| Daily call-minus-put growth surprise | -0.31σ (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 20 completed Day +10 paths · latest Aug 5, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 20 | -2.5% | -3.9% to +0.8% | 30% | -3.4% to +0.4% | 0.0% |
| Day +2 | 20 | -1.8% | -8.6% to +5.7% | 35% | -8.5% to +5.7% | 0.0% |
| Day +3 | 20 | +0.2% | -9.9% to +5.1% | 50% | -9.4% to +4.7% | 0.0% |
| Day +4 | 20 | -0.4% | -9.9% to +14.1% | 40% | -9.6% to +13.5% | 0.0% |
| Day +5 | 20 | +0.2% | -11.3% to +14.6% | 50% | -11.1% to +14.2% | 0.0% |
| Day +6 | 20 | -1.9% | -9.7% to +10.0% | 45% | -9.4% to +8.5% | 0.0% |
| Day +7 | 20 | -2.4% | -8.0% to +8.1% | 45% | -7.3% to +7.9% | 0.0% |
| Day +8 | 20 | -4.0% | -13.1% to +1.5% | 30% | -13.0% to +0.7% | 0.0% |
| Day +9 | 20 | -2.8% | -13.0% to +3.6% | 40% | -12.9% to +3.3% | 0.0% |
| Day +10 | 20 | +0.3% | -14.7% to +9.7% | 50% | -14.4% to +8.0% | 0.0% |
Crosses above gamma max 17 completed Day +10 paths · latest Jan 8, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 17 | -1.2% | -4.7% to +5.8% | 41% | -4.7% to +5.8% | 0.0% |
| Day +2 | 17 | -4.6% | -7.9% to +5.4% | 35% | -7.9% to +5.4% | 0.0% |
| Day +3 | 17 | -3.3% | -8.7% to +2.6% | 29% | -8.7% to +2.6% | 0.0% |
| Day +4 | 17 | -2.7% | -7.4% to 0.0% | 24% | -7.4% to 0.0% | 0.0% |
| Day +5 | 17 | -5.6% | -9.8% to +9.8% | 35% | -9.8% to +9.8% | 0.0% |
| Day +6 | 17 | -3.7% | -13.7% to +10.2% | 41% | -13.7% to +10.2% | 0.0% |
| Day +7 | 17 | -6.0% | -15.8% to +17.3% | 41% | -15.8% to +17.3% | 0.0% |
| Day +8 | 17 | -6.2% | -14.5% to +8.7% | 47% | -14.5% to +8.7% | 0.0% |
| Day +9 | 17 | -8.3% | -16.3% to +1.9% | 29% | -16.3% to +1.9% | 0.0% |
| Day +10 | 17 | -5.5% | -17.3% to -1.5% | 24% | -17.3% to -1.5% | -1.5% |
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 | 6% |
| Gamma max crosses | 20 |
| Delta neutral crosses | 29 |
| Prior-year sessions closer to gamma max | 21.0% of 252 |
| Prior-year sessions closer to delta neutral | 34.5% of 252 |
| Open interest percentile (1y) | 80th |
| Daily open interest change versus prior year | -0.49σ (-7,115 contracts; 252 prior changes) |
| Open interest change, 5 sessions | +8.3% |
| Open interest change, 21 sessions | +4.0% |
| History available | Sep 3, 2024 → Oct 2, 2026 |
Recent crosses
- closed below delta neutral at 5.09 vs 5.30 (-4.2%)
- closed below gamma max at 5.66 vs 6.03 (-6.5%)
- closed above delta neutral at 5.65 vs 5.55 (+1.7%)
- closed above gamma max at 5.65 vs 5.36 (+5.1%)
- closed below gamma max at 4.78 vs 5.60 (-17.1%)
- closed above gamma max at 4.81 vs 2.00 (+58.4%)
- closed below gamma max at 5.38 vs 5.84 (-8.5%)
- closed above gamma max at 5.09 vs 2.86 (+43.8%)
- closed below delta neutral at 6.05 vs 6.19 (-2.3%)
- closed above delta neutral at 6.45 vs 6.41 (+0.6%)
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/SERV
Questions people ask about SERV
Where is SERV's gamma max today?
As of Oct 2, 2026, the gamma max for SERV is 4.99, +8.0% from the 4.61 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 SERV above or below its delta neutral price?
SERV closed below delta neutral: 4.61 against a delta neutral price of 4.83. The delta neutral price is where the summed delta of the whole chain is zero; the definition.
How much open interest does SERV have?
210,214 contracts of open interest across 292 listed contracts on Oct 2, 2026, -3.3% 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.