# MOS: options-positioning snapshot

Canonical: https://halfonadouble.com/stock/MOS
Data through: 2026-10-02 close
Publisher: Half on a Double

| Published field | Value |
| --- | --- |
| Close (USD/share) | 21.07 |
| Delta neutral (USD/share) | 21.92 |
| Gamma neutral (USD/share) | 21.15 |
| Gamma max (USD/share) | 26.47 |
| Open interest (contracts) | 366,363 |
| Nearest-expiration max pain (USD/share) | 22.50 (2026-10-09) |
| All-expiration max pain (USD/share) | 25.00 |
| Net gamma exposure | -224,936 |
| Confirmed GEX flip (USD/share) | 21.15 |
| Call wall (USD/share) | 25.00 |
| Put wall (USD/share) | 20.00 |
| Put/call open-interest ratio | 0.68 |
| Options catalyst-intensity score (0–100) | 58.8 |
| Options directional score (-100 to +100) | 14.6 |
| IV rank | 100.0 |
| Front ATM IV | +49.6% |
| Front-minus-back IV | -2.0 pp |
| Front expected move | +6.9% |
| Front ATM straddle / spot | +5.8% |
| Front 25-delta risk reversal | -14.0 pp |
| Call OI change, 1 session | -3,608 contracts · -1.6% |
| Put OI change, 1 session | -3,333 contracts · -2.2% |
| Call minus put OI growth, 1 session | +0.6 pp |
| Call OI change, 5 sessions | +5,398 contracts · +2.5% |
| Put OI change, 5 sessions | +2,996 contracts · +2.1% |
| Call minus put OI growth, 5 sessions | +0.5 pp |
| Daily call OI change surprise | -0.33σ (252 prior changes) |
| Daily put OI change surprise | -0.63σ (252 prior changes) |
| Daily call-minus-put growth surprise | +0.15σ (252 prior changes) |
| Daily open interest change (contracts) | -6,941 |
| Daily open interest change z-score (prior 252) | -0.45σ (252 prior changes) |
| Gamma max distance from close | +25.6% |
| Delta neutral distance from close | +4.0% |
| Prior-year sessions closer to gamma max | 71.4% of 252 |
| Prior-year sessions closer to delta neutral | 45.2% of 252 |

## Historical gamma-max cross outcomes

| Direction | Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| above | Day +1 | 30 | -0.2% | -2.1% to +1.5% | 47% | -1.1% to +0.7% | 0.0% |
| above | Day +3 | 30 | +0.2% | -4.9% to +4.2% | 50% | -3.4% to +3.0% | 0.0% |
| above | Day +5 | 30 | +0.8% | -3.7% to +4.7% | 57% | -2.6% to +3.4% | 0.0% |
| above | Day +10 | 30 | +2.5% | -4.1% to +7.3% | 60% | -0.3% to +5.6% | 0.0% |
| below | Day +1 | 31 | +0.0% | -1.4% to +2.1% | 52% | -0.8% to +1.5% | 0.0% |
| below | Day +3 | 31 | +0.9% | -2.3% to +4.6% | 55% | -1.2% to +3.4% | 0.0% |
| below | Day +5 | 31 | +1.3% | -4.1% to +5.3% | 55% | -1.4% to +4.4% | 0.0% |
| below | Day +10 | 31 | +3.6% | -5.6% to +7.8% | 65% | -3.2% to +6.6% | 0.0% |

Returns are close-to-close after the labelled number of subsequent trading sessions. Cohorts require gamma max to be within 10% of the close on both crossing sessions. Historical windows can overlap and are not independent observations, so interval coverage is not guaranteed.

- [Machine-readable snapshot](https://halfonadouble.com/api/v1/tickers/MOS.json)
- [Historical CSV](https://halfonadouble.com/api/v1/history/MOS.csv)
- [Complete advanced analysis](https://halfonadouble.com/api/v1/analysis/MOS.json?date=2026-10-02)

An em dash means unavailable, not zero. Values use the same display rounding as the HTML page. This is a current snapshot; full history and individual event paths are on the canonical page.

[Definitions and limitations](https://halfonadouble.com/methodology.md).