# UMC: options-positioning snapshot

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

| Published field | Value |
| --- | --- |
| Close (USD/share) | 26.27 |
| Delta neutral (USD/share) | 21.45 |
| Gamma neutral (USD/share) | 19.77 |
| Gamma max (USD/share) | 24.80 |
| Open interest (contracts) | 226,079 |
| Nearest-expiration max pain (USD/share) | 20.00 (2026-10-16) |
| All-expiration max pain (USD/share) | 19.00 |
| Net gamma exposure | 21,475,433 |
| Confirmed GEX flip (USD/share) | 19.77 |
| Call wall (USD/share) | 26.00 |
| Put wall (USD/share) | 22.00 |
| Put/call open-interest ratio | 0.49 |
| Options catalyst-intensity score (0–100) | 47.7 |
| Options directional score (-100 to +100) | 18.5 |
| IV rank | 0.0 |
| Front ATM IV | +58.4% |
| Front-minus-back IV | -6.7 pp |
| Front expected move | +11.4% |
| Front ATM straddle / spot | +8.7% |
| Front 25-delta risk reversal | -4.8 pp |
| Call OI change, 1 session | +751 contracts · +0.5% |
| Put OI change, 1 session | +405 contracts · +0.5% |
| Call minus put OI growth, 1 session | -0.0 pp |
| Call OI change, 5 sessions | +2,398 contracts · +1.6% |
| Put OI change, 5 sessions | +1,079 contracts · +1.5% |
| Call minus put OI growth, 5 sessions | +0.1 pp |
| Daily call OI change surprise | +0.02σ (252 prior changes) |
| Daily put OI change surprise | +0.06σ (252 prior changes) |
| Daily call-minus-put growth surprise | -0.02σ (252 prior changes) |
| Daily open interest change (contracts) | 1,156 |
| Daily open interest change z-score (prior 252) | +0.04σ (252 prior changes) |
| Gamma max distance from close | -5.6% |
| Delta neutral distance from close | -18.4% |
| Prior-year sessions closer to gamma max | 29.8% of 252 |
| Prior-year sessions closer to delta neutral | 69.4% of 252 |

## Historical gamma-max cross outcomes

| Direction | Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| above | Day +1 | 24 | +0.8% | -0.9% to +3.5% | 58% | -0.9% to +2.5% | 0.0% |
| above | Day +3 | 24 | +1.7% | -1.0% to +4.7% | 63% | -0.6% to +2.8% | 0.0% |
| above | Day +5 | 23 | -0.2% | -2.8% to +4.7% | 43% | -2.3% to +2.1% | 0.0% |
| above | Day +10 | 23 | +3.0% | -4.0% to +7.5% | 65% | -1.0% to +7.0% | 0.0% |
| below | Day +1 | 18 | +0.1% | -1.7% to +3.2% | 50% | -1.3% to +2.4% | 0.0% |
| below | Day +3 | 18 | -0.2% | -3.3% to +3.0% | 44% | -2.8% to +2.1% | 0.0% |
| below | Day +5 | 17 | -1.9% | -5.2% to +1.3% | 35% | -5.2% to +1.3% | 0.0% |
| below | Day +10 | 17 | -4.0% | -8.5% to +2.2% | 41% | -8.5% to +2.2% | 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/UMC.json)
- [Historical CSV](https://halfonadouble.com/api/v1/history/UMC.csv)
- [Complete advanced analysis](https://halfonadouble.com/api/v1/analysis/UMC.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).