# ACI: options-positioning snapshot

Canonical: https://halfonadouble.com/stock/ACI
Data through: 2026-10-23 close
Publisher: Half on a Double

| Published field | Value |
| --- | --- |
| Close (USD/share) | 13.96 |
| Delta neutral (USD/share) | 11.38 |
| Gamma neutral (USD/share) | 7.09 |
| Gamma max (USD/share) | 14.10 |
| Open interest (contracts) | 102,286 |
| Nearest-expiration max pain (USD/share) | 13.50 (2026-10-30) |
| All-expiration max pain (USD/share) | 13.00 |
| Net gamma exposure | 10,742,851 |
| Confirmed GEX flip (USD/share) | 7.09 |
| Call wall (USD/share) | 15.00 |
| Put wall (USD/share) | 13.00 |
| Put/call open-interest ratio | 0.24 |
| Options catalyst-intensity score (0–100) | 53.5 |
| Options directional score (-100 to +100) | -5.6 |
| IV rank | 25.0 |
| Front-minus-back IV | 5.9 pp |
| Front 25-delta risk reversal | 97.4 pp |
| Call OI change, 1 session | -1,910 contracts · -2.3% |
| Put OI change, 1 session | -2,819 contracts · -12.4% |
| Call minus put OI growth, 1 session | +10.2 pp |
| Call OI change, 5 sessions | +16,803 contracts · +25.6% |
| Put OI change, 5 sessions | +1,397 contracts · +7.6% |
| Call minus put OI growth, 5 sessions | +18.0 pp |
| Daily call OI change surprise | -0.40σ (252 prior changes) |
| Daily put OI change surprise | -1.87σ (252 prior changes) |
| Daily call-minus-put growth surprise | +1.16σ (252 prior changes) |
| Daily open interest change (contracts) | -4,729 |
| Daily open interest change z-score (prior 252) | -0.83σ (252 prior changes) |
| Gamma max distance from close | +1.0% |
| Delta neutral distance from close | -18.5% |
| Prior-year sessions closer to gamma max | 2.8% of 252 |
| Prior-year sessions closer to delta neutral | 99.6% of 252 |

## Historical gamma-max cross outcomes

| Direction | Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| above | Day +1 | 42 | +0.1% | -1.6% to +0.7% | 52% | -0.7% to +0.2% | 0.0% |
| above | Day +3 | 42 | +0.0% | -2.0% to +1.1% | 52% | -1.3% to +0.4% | 0.0% |
| above | Day +5 | 42 | +0.3% | -2.6% to +2.3% | 50% | -1.4% to +1.3% | 0.0% |
| above | Day +10 | 41 | -0.3% | -2.8% to +1.7% | 49% | -1.5% to +1.1% | 0.0% |
| below | Day +1 | 43 | -0.0% | -0.8% to +0.9% | 49% | -0.2% to +0.4% | 0.0% |
| below | Day +3 | 43 | +0.3% | -0.9% to +1.4% | 60% | -0.0% to +1.1% | 0.0% |
| below | Day +5 | 43 | +0.5% | -2.0% to +2.3% | 58% | -0.8% to +1.5% | 0.0% |
| below | Day +10 | 42 | +0.6% | -2.4% to +1.9% | 57% | -1.2% to +1.0% | 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/ACI.json)
- [Historical CSV](https://halfonadouble.com/api/v1/history/ACI.csv)
- [Public aggregate analysis](https://halfonadouble.com/api/v1/analysis/ACI.json?date=2026-10-23&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).