# STM: options-positioning snapshot

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

| Published field | Value |
| --- | --- |
| Close (USD/share) | 57.26 |
| Delta neutral (USD/share) | 54.55 |
| Gamma neutral (USD/share) | 52.70 |
| Gamma max (USD/share) | 72.32 |
| Open interest (contracts) | 347,633 |
| Nearest-expiration max pain (USD/share) | 52.00 (2026-10-09) |
| All-expiration max pain (USD/share) | 55.00 |
| Net gamma exposure | 4,305,922 |
| Confirmed GEX flip (USD/share) | 52.70 |
| Call wall (USD/share) | 55.00 |
| Put wall (USD/share) | 55.00 |
| Put/call open-interest ratio | 0.84 |
| Options catalyst-intensity score (0–100) | 59.8 |
| Options directional score (-100 to +100) | -28.7 |
| IV rank | 93.2 |
| Front ATM IV | +54.9% |
| Front-minus-back IV | -9.1 pp |
| Front expected move | +7.6% |
| Front ATM straddle / spot | +8.1% |
| Front 25-delta risk reversal | 70.8 pp |
| Call OI change, 1 session | -14,689 contracts · -7.2% |
| Put OI change, 1 session | -460 contracts · -0.3% |
| Call minus put OI growth, 1 session | -6.9 pp |
| Call OI change, 5 sessions | -5,923 contracts · -3.0% |
| Put OI change, 5 sessions | +3,458 contracts · +2.2% |
| Call minus put OI growth, 5 sessions | -5.3 pp |
| Daily call OI change surprise | -1.30σ (252 prior changes) |
| Daily put OI change surprise | -0.18σ (252 prior changes) |
| Daily call-minus-put growth surprise | -1.91σ (252 prior changes) |
| Daily open interest change (contracts) | -15,149 |
| Daily open interest change z-score (prior 252) | -1.01σ (252 prior changes) |
| Gamma max distance from close | +26.3% |
| Delta neutral distance from close | -4.7% |
| Prior-year sessions closer to gamma max | 88.1% of 252 |
| Prior-year sessions closer to delta neutral | 27.8% 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 | -0.5% | -2.2% to +1.3% | 47% | -1.1% to +0.7% | 0.0% |
| above | Day +3 | 30 | +0.3% | -2.4% to +2.5% | 53% | -2.0% to +1.1% | 0.0% |
| above | Day +5 | 30 | +0.2% | -3.5% to +2.1% | 53% | -1.1% to +1.5% | 0.0% |
| above | Day +10 | 29 | -2.9% | -8.2% to +4.0% | 41% | -5.7% to +2.4% | 0.0% |
| below | Day +1 | 27 | -0.7% | -2.1% to +1.7% | 41% | -1.7% to +1.6% | 0.0% |
| below | Day +3 | 27 | +1.3% | -2.5% to +3.0% | 59% | -2.3% to +2.6% | 0.0% |
| below | Day +5 | 27 | +0.9% | -3.7% to +3.7% | 59% | -3.2% to +2.3% | 0.0% |
| below | Day +10 | 26 | -3.7% | -7.0% to +4.4% | 35% | -6.4% to +1.8% | 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/STM.json)
- [Historical CSV](https://halfonadouble.com/api/v1/history/STM.csv)
- [Complete advanced analysis](https://halfonadouble.com/api/v1/analysis/STM.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).