RIO max pain, gamma exposure (GEX) & options open interest
As of close · rank #586 by open interest · 1,394 sessions of history since Dec 1, 2020
RIO's nearest-expiration max pain is 97.50 for 2026-10-16, its GEX flip is 93.29, net GEX is 939,725, its put/call open-interest ratio is 0.72. 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 0.33σ · front IV premium 1.8 pp
RIO closed 14.3% below its gamma max of 107.69. It is 2.0% above the delta neutral price of 92.31. Total open interest is 117,490, +2.6% versus the previous session. Its options catalyst-intensity score is 52.9 out of 100, led by OI change 0.33σ, front IV premium 1.8 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 | +816 contracts · +1.2% |
| Put OI change, 1 session | +2,169 contracts · +4.6% |
| Call minus put OI growth, 1 session | -3.4 pp |
| Call OI change, 5 sessions | +4,255 contracts · +6.6% |
| Put OI change, 5 sessions | +7,458 contracts · +17.9% |
| Call minus put OI growth, 5 sessions | -11.3 pp |
| Daily call OI change surprise | +0.18σ (252 prior changes) |
| Daily put OI change surprise | +0.42σ (252 prior changes) |
| Daily call-minus-put growth surprise | -0.92σ (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 23 completed Day +10 paths · latest May 15, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 23 | +0.5% | -1.0% to +1.7% | 61% | -0.4% to +0.7% | 0.0% |
| Day +2 | 23 | -0.1% | -2.0% to +2.2% | 48% | -1.1% to +1.8% | 0.0% |
| Day +3 | 23 | +1.0% | -1.0% to +2.6% | 57% | -0.6% to +1.9% | 0.0% |
| Day +4 | 23 | +0.1% | -2.8% to +3.9% | 57% | -1.6% to +2.6% | 0.0% |
| Day +5 | 23 | +1.6% | -2.9% to +2.6% | 61% | -1.3% to +2.4% | 0.0% |
| Day +6 | 23 | +1.2% | -3.0% to +4.1% | 57% | -0.8% to +3.1% | 0.0% |
| Day +7 | 23 | +1.2% | -1.5% to +4.2% | 61% | -0.5% to +2.9% | 0.0% |
| Day +8 | 23 | +1.4% | -1.8% to +4.2% | 65% | -1.2% to +3.3% | 0.0% |
| Day +9 | 23 | +1.2% | -2.2% to +3.6% | 61% | -1.0% to +3.1% | 0.0% |
| Day +10 | 23 | +0.4% | -4.2% to +4.8% | 57% | -3.4% to +3.5% | 0.0% |
Crosses above gamma max 27 completed Day +10 paths · latest May 13, 2026
| Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
|---|---|---|---|---|---|---|
| Day +1 | 27 | -0.1% | -1.4% to +1.0% | 48% | -1.2% to +0.8% | 0.0% |
| Day +2 | 27 | -0.9% | -2.0% to +2.4% | 44% | -1.5% to +0.9% | 0.0% |
| Day +3 | 27 | -0.3% | -3.1% to +2.2% | 41% | -2.7% to +1.3% | 0.0% |
| Day +4 | 27 | +0.4% | -2.9% to +3.2% | 56% | -2.8% to +2.6% | 0.0% |
| Day +5 | 27 | +0.3% | -3.3% to +2.9% | 52% | -3.2% to +2.5% | 0.0% |
| Day +6 | 27 | +0.3% | -3.1% to +3.2% | 52% | -2.4% to +3.0% | 0.0% |
| Day +7 | 27 | +1.3% | -3.5% to +2.9% | 56% | -2.4% to +2.8% | 0.0% |
| Day +8 | 27 | +1.2% | -2.2% to +3.1% | 56% | -1.1% to +2.2% | 0.0% |
| Day +9 | 27 | +0.5% | -1.3% to +2.8% | 56% | -0.9% to +2.5% | 0.0% |
| Day +10 | 27 | +0.6% | -2.8% to +3.7% | 52% | -2.1% to +2.9% | 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 | 4% |
| Gamma max crosses | 12 |
| Delta neutral crosses | 4 |
| Prior-year sessions closer to gamma max | 82.1% of 252 |
| Prior-year sessions closer to delta neutral | 5.2% of 252 |
| Open interest percentile (1y) | 5th |
| Daily open interest change versus prior year | +0.33σ (2,985 contracts; 252 prior changes) |
| Open interest change, 5 sessions | +11.1% |
| Open interest change, 21 sessions | -5.9% |
| History available | Dec 1, 2020 → Oct 2, 2026 |
Recent crosses
- closed above delta neutral at 90.54 vs 89.73 (+0.9%)
- closed below delta neutral at 88.80 vs 89.74 (-1.1%)
- closed below gamma max at 103.69 vs 111.82 (-7.8%)
- closed above gamma max at 112.04 vs 109.69 (+2.1%)
- closed above delta neutral at 83.15 vs 83.00 (+0.2%)
- closed below delta neutral at 85.65 vs 86.24 (-0.7%)
- closed below gamma max at 97.91 vs 99.80 (-1.9%)
- closed above gamma max at 99.52 vs 98.71 (+0.8%)
- closed below gamma max at 91.12 vs 95.25 (-4.5%)
- closed above gamma max at 96.37 vs 95.87 (+0.5%)
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/RIO
Questions people ask about RIO
Where is RIO's gamma max today?
As of Oct 2, 2026, the gamma max for RIO is 107.69, +14.3% from the 94.21 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 RIO above or below its delta neutral price?
RIO closed above delta neutral: 94.21 against a delta neutral price of 92.31. The delta neutral price is where the summed delta of the whole chain is zero; the definition.
How much open interest does RIO have?
117,490 contracts of open interest across 339 listed contracts on Oct 2, 2026, +2.6% 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.