COST max pain, gamma exposure (GEX) & options open interest
As of close · rank #325 by open interest · 1,394 sessions of history since Dec 1, 2020
COST's nearest-expiration max pain is 915.00 for 2026-10-09, its GEX flip is 922.74, net GEX is -1,215,651, its put/call open-interest ratio is 0.89. 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: volume/OI 0.11 · front IV premium 0.1 pp
COST closed 9.2% below its gamma max of 1,005.79. It is 0.8% above the delta neutral price of 913.31. Total open interest is 269,836, -9.9% versus the previous session. Its options catalyst-intensity score is 49.3 out of 100, led by volume/OI 0.11, front IV premium 0.1 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 | -13,888 contracts · -8.9% |
| Put OI change, 1 session | -15,614 contracts · -10.9% |
| Call minus put OI growth, 1 session | +2.1 pp |
| Call OI change, 5 sessions | +8,110 contracts · +6.0% |
| Put OI change, 5 sessions | +986 contracts · +0.8% |
| Call minus put OI growth, 5 sessions | +5.2 pp |
| Daily call OI change surprise | -1.23σ (252 prior changes) |
| Daily put OI change surprise | -1.31σ (252 prior changes) |
| Daily call-minus-put growth surprise | +0.80σ (252 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 9 completed Day +10 paths · latest Dec 19, 2023
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 9 | -0.7% | -2.1% to -0.2% | 22% | -2.5% to +0.2% | 0.0% |
| Day +2 | 9 | +0.3% | -1.6% to +0.7% | 56% | -1.9% to +0.8% | 0.0% |
| Day +3 | 9 | -0.8% | -1.5% to +1.0% | 44% | -1.5% to +1.1% | 0.0% |
| Day +4 | 9 | -0.2% | -1.2% to +0.6% | 44% | -1.6% to +1.3% | 0.0% |
| Day +5 | 9 | +0.7% | -1.6% to +1.5% | 67% | -1.6% to +1.9% | 0.0% |
| Day +6 | 9 | -0.1% | -1.0% to +2.0% | 44% | -2.1% to +2.0% | 0.0% |
| Day +7 | 9 | +0.6% | -0.4% to +2.7% | 56% | -1.4% to +2.9% | 0.0% |
| Day +8 | 9 | -0.3% | -1.2% to +2.4% | 44% | -1.4% to +2.6% | 0.0% |
| Day +9 | 9 | +1.1% | -0.2% to +3.3% | 67% | -4.7% to +3.8% | 0.0% |
| Day +10 | 9 | +1.3% | -0.9% to +4.0% | 67% | -4.3% to +4.4% | 0.0% |
Crosses above gamma max 9 completed Day +10 paths · latest Dec 18, 2023
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 9 | -0.3% | -0.5% to +0.5% | 44% | -0.8% to +0.6% | 0.0% |
| Day +2 | 9 | -0.6% | -2.4% to +0.2% | 33% | -3.0% to +1.9% | 0.0% |
| Day +3 | 9 | -0.0% | -1.3% to +0.8% | 44% | -2.4% to +1.2% | 0.0% |
| Day +4 | 9 | -1.1% | -2.0% to +0.6% | 44% | -2.8% to +1.4% | 0.0% |
| Day +5 | 9 | -0.7% | -1.0% to +0.7% | 44% | -2.0% to +1.3% | 0.0% |
| Day +6 | 9 | +0.4% | -1.8% to +1.2% | 67% | -2.1% to +1.8% | 0.0% |
| Day +7 | 9 | +0.3% | -2.3% to +1.4% | 56% | -2.4% to +2.2% | 0.0% |
| Day +8 | 9 | +0.4% | -0.7% to +2.2% | 67% | -1.6% to +2.3% | 0.0% |
| Day +9 | 9 | +0.2% | -1.5% to +2.1% | 56% | -2.7% to +2.9% | 0.0% |
| Day +10 | 9 | +1.3% | +0.2% to +2.6% | 78% | -5.4% to +2.7% | 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 | 0% |
| Gamma max crosses | 0 |
| Delta neutral crosses | 33 |
| Prior-year sessions closer to gamma max | 71.8% of 252 |
| Prior-year sessions closer to delta neutral | 22.6% of 252 |
| Open interest percentile (1y) | 40th |
| Daily open interest change versus prior year | -1.30σ (-29,502 contracts; 252 prior changes) |
| Open interest change, 5 sessions | +3.5% |
| Open interest change, 21 sessions | -17.8% |
| History available | Dec 1, 2020 → Oct 2, 2026 |
Recent crosses
- closed above delta neutral at 922.77 vs 910.35 (+1.3%)
- closed below delta neutral at 928.48 vs 935.89 (-0.8%)
- closed above delta neutral at 945.47 vs 937.32 (+0.9%)
- closed below delta neutral at 934.66 vs 937.80 (-0.3%)
- closed above delta neutral at 947.74 vs 935.71 (+1.3%)
- closed below delta neutral at 933.51 vs 940.14 (-0.7%)
- closed above delta neutral at 935.03 vs 928.57 (+0.7%)
- closed below delta neutral at 929.22 vs 930.79 (-0.2%)
- closed above delta neutral at 945.57 vs 934.13 (+1.2%)
- closed below delta neutral at 912.97 vs 938.86 (-2.8%)
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/COST
Questions people ask about COST
Where is COST's gamma max today?
As of Oct 2, 2026, the gamma max for COST is 1,005.79, +9.2% from the 920.65 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 COST above or below its delta neutral price?
COST closed above delta neutral: 920.65 against a delta neutral price of 913.31. The delta neutral price is where the summed delta of the whole chain is zero; the definition.
How much open interest does COST have?
269,836 contracts of open interest across 2,224 listed contracts on Oct 2, 2026, -9.9% 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.