ERAS max pain, gamma exposure (GEX) & options open interest
As of close · rank #451 by open interest · 881 sessions of history since Jun 9, 2022
ERAS's nearest-expiration max pain is 15.00 for 2026-10-16, its GEX flip is 6.98, net GEX is 6,194,899, its put/call open-interest ratio is 0.25. 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: 14d expected move +19.9% · OI change 0.03σ
ERAS closed 11.9% below its gamma max of 16.50. It is 25.8% above the delta neutral price of 10.94. Total open interest is 170,770, +0.5% versus the previous session. Its options catalyst-intensity score is 51.5 out of 100, led by 14d expected move +19.9%, OI change 0.03σ. 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 | +57 contracts · +0.0% |
| Put OI change, 1 session | +817 contracts · +2.4% |
| Call minus put OI growth, 1 session | -2.4 pp |
| Call OI change, 5 sessions | -6,578 contracts · -4.6% |
| Put OI change, 5 sessions | +3,086 contracts · +9.8% |
| Call minus put OI growth, 5 sessions | -14.4 pp |
| Daily call OI change surprise | -0.10σ (224 prior changes) |
| Daily put OI change surprise | +0.38σ (224 prior changes) |
| Daily call-minus-put growth surprise | — (184 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 below gamma max 8 completed Day +10 paths · latest Sep 2, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 8 | +0.4% | -2.0% to +2.9% | 50% | -6.2% to +6.2% | 0.0% |
| Day +2 | 8 | -2.4% | -6.4% to +0.7% | 25% | -8.0% to +5.0% | 0.0% |
| Day +3 | 8 | +0.9% | -4.6% to +2.5% | 50% | -6.6% to +2.6% | 0.0% |
| Day +4 | 8 | -2.1% | -13.4% to +4.7% | 38% | -16.0% to +8.6% | 0.0% |
| Day +5 | 8 | -4.4% | -15.9% to +5.1% | 38% | -19.9% to +9.5% | 0.0% |
| Day +6 | 8 | -1.4% | -16.7% to +6.6% | 50% | -21.7% to +10.3% | 0.0% |
| Day +7 | 8 | +0.9% | -17.5% to +6.0% | 50% | -23.6% to +10.9% | 0.0% |
| Day +8 | 8 | +1.7% | -17.8% to +6.8% | 50% | -26.1% to +13.8% | 0.0% |
| Day +9 | 8 | +1.1% | -20.1% to +11.5% | 50% | -26.2% to +18.6% | 0.0% |
| Day +10 | 8 | +1.6% | -18.2% to +13.5% | 50% | -24.1% to +14.0% | 0.0% |
Crosses above gamma max 8 completed Day +10 paths · latest Jun 1, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 8 | -2.5% | -4.2% to -0.9% | 25% | -7.2% to +3.1% | 0.0% |
| Day +2 | 8 | -1.2% | -3.2% to +1.7% | 38% | -4.6% to +3.4% | 0.0% |
| Day +3 | 8 | -0.6% | -6.4% to +7.3% | 50% | -7.9% to +7.5% | 0.0% |
| Day +4 | 8 | +0.4% | -7.1% to +1.8% | 63% | -13.4% to +5.1% | 0.0% |
| Day +5 | 8 | +0.2% | -3.5% to +4.3% | 50% | -6.9% to +10.6% | 0.0% |
| Day +6 | 8 | +2.6% | +0.2% to +9.1% | 75% | -3.0% to +19.1% | 0.0% |
| Day +7 | 8 | +6.5% | -7.4% to +12.0% | 63% | -20.0% to +16.2% | 0.0% |
| Day +8 | 8 | +2.1% | -7.0% to +10.4% | 75% | -30.6% to +13.6% | 0.0% |
| Day +9 | 8 | +6.1% | -6.4% to +11.2% | 75% | -30.6% to +12.5% | 0.0% |
| Day +10 | 8 | +5.2% | -5.6% to +10.3% | 75% | -31.8% to +11.0% | 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 | 68% |
| Gamma max crosses | 25 |
| Delta neutral crosses | 2 |
| Prior-year sessions closer to gamma max | 42.7% of 185 |
| Prior-year sessions closer to delta neutral | 22.7% of 185 |
| Open interest percentile (1y) | 99th |
| Daily open interest change versus prior year | +0.03σ (874 contracts; 252 prior changes) |
| Open interest change, 5 sessions | -2.0% |
| Open interest change, 21 sessions | +6.6% |
| History available | Jun 9, 2022 → Oct 2, 2026 |
Recent crosses
- closed below gamma max at 16.37 vs 16.48 (-0.7%)
- closed above gamma max at 18.03 vs 15.84 (+12.1%)
- closed below gamma max at 19.15 vs 19.69 (-2.8%)
- closed above gamma max at 17.63 vs 15.97 (+9.4%)
- closed below gamma max at 17.86 vs 18.28 (-2.3%)
- closed above gamma max at 13.82 vs 12.64 (+8.5%)
- closed below gamma max at 12.84 vs 13.55 (-5.5%)
- closed above gamma max at 11.60 vs 10.86 (+6.4%)
- closed above delta neutral at 10.65 vs 9.84 (+7.6%)
- closed below delta neutral at 9.11 vs 9.52 (-4.5%)
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/ERAS
Questions people ask about ERAS
Where is ERAS's gamma max today?
As of Oct 2, 2026, the gamma max for ERAS is 16.50, +11.9% from the 14.74 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 ERAS above or below its delta neutral price?
ERAS closed above delta neutral: 14.74 against a delta neutral price of 10.94. The delta neutral price is where the summed delta of the whole chain is zero; the definition.
How much open interest does ERAS have?
170,770 contracts of open interest across 129 listed contracts on Oct 2, 2026, +0.5% 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.