# UMC: options-positioning snapshot

Canonical: https://halfonadouble.com/stock/UMC
Data through: 2026-10-16 close
Publisher: Half on a Double

| Published field | Value |
| --- | --- |
| Close (USD/share) | 19.82 |
| Delta neutral (USD/share) | 17.01 |
| Gamma neutral (USD/share) | 11.28 |
| Gamma max (USD/share) | 23.21 |
| Open interest (contracts) | 280,510 |
| Nearest-expiration max pain (USD/share) | 23.00 (2026-11-20) |
| All-expiration max pain (USD/share) | 21.00 |
| Net gamma exposure | 11,507,700 |
| Confirmed GEX flip (USD/share) | 11.28 |
| Call wall (USD/share) | 23.00 |
| Put wall (USD/share) | 20.00 |
| Put/call open-interest ratio | 0.33 |
| Options catalyst-intensity score (0–100) | 38.8 |
| Options directional score (-100 to +100) | 8.2 |
| IV rank | 97.4 |
| Front-minus-back IV | 0.0 pp |
| Front 25-delta risk reversal | 4.6 pp |
| Call OI change, 1 session | -99,831 contracts · -32.2% |
| Put OI change, 1 session | -33,019 contracts · -32.1% |
| Call minus put OI growth, 1 session | -0.1 pp |
| Call OI change, 5 sessions | -37,583 contracts · -15.1% |
| Put OI change, 5 sessions | -20,981 contracts · -23.1% |
| Call minus put OI growth, 5 sessions | +8.0 pp |
| Daily call OI change surprise | -9.21σ (252 prior changes) |
| Daily put OI change surprise | -11.21σ (252 prior changes) |
| Daily call-minus-put growth surprise | -0.04σ (252 prior changes) |
| Daily open interest change (contracts) | -132,850 |
| Daily open interest change z-score (prior 252) | -10.64σ (252 prior changes) |
| Gamma max distance from close | +17.1% |
| Delta neutral distance from close | -14.2% |
| Prior-year sessions closer to gamma max | 92.5% of 252 |
| Prior-year sessions closer to delta neutral | 57.1% 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 | 24 | -0.5% | -3.3% to +3.5% | 42% | -2.6% to +2.1% | 0.0% |
| above | Day +10 | 24 | +2.5% | -4.4% to +7.4% | 63% | -3.8% to +7.0% | 0.0% |
| below | Day +1 | 19 | -0.2% | -2.2% to +3.0% | 47% | -1.8% to +2.4% | 0.0% |
| below | Day +3 | 19 | -0.2% | -3.6% to +2.7% | 42% | -3.5% to +2.1% | 0.0% |
| below | Day +5 | 19 | -1.9% | -5.4% to +0.8% | 37% | -5.2% to +0.3% | 0.0% |
| below | Day +10 | 18 | -4.7% | -8.2% to +2.2% | 39% | -7.1% to +1.9% | 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)
- [Public aggregate analysis](https://halfonadouble.com/api/v1/analysis/UMC.json?date=2026-10-16&public_schema=4)

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).