# PACB: options-positioning snapshot

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

| Published field | Value |
| --- | --- |
| Close (USD/share) | 1.73 |
| Delta neutral (USD/share) | 0.56 |
| Gamma neutral (USD/share) | 1.30 |
| Gamma max (USD/share) | 1.48 |
| Open interest (contracts) | 175,075 |
| Nearest-expiration max pain (USD/share) | 2.00 (2026-11-20) |
| All-expiration max pain (USD/share) | 1.50 |
| Net gamma exposure | 8,206,969 |
| Confirmed GEX flip (USD/share) | 1.30 |
| Call wall (USD/share) | 2.00 |
| Put wall (USD/share) | 2.00 |
| Put/call open-interest ratio | 0.07 |
| Options catalyst-intensity score (0–100) | 58.0 |
| Options directional score (-100 to +100) | 45.2 |
| IV rank | 100.0 |
| Front-minus-back IV | – pp |
| Front 25-delta risk reversal | -86.3 pp |
| Call OI change, 1 session | -15,541 contracts · -8.7% |
| Put OI change, 1 session | -2,678 contracts · -18.6% |
| Call minus put OI growth, 1 session | +10.0 pp |
| Call OI change, 5 sessions | -14,638 contracts · -8.2% |
| Put OI change, 5 sessions | -2,345 contracts · -16.7% |
| Call minus put OI growth, 5 sessions | +8.5 pp |
| Daily call OI change surprise | -2.48σ (252 prior changes) |
| Daily put OI change surprise | -4.66σ (252 prior changes) |
| Daily call-minus-put growth surprise | +1.65σ (252 prior changes) |
| Daily open interest change (contracts) | -18,219 |
| Daily open interest change z-score (prior 252) | -2.70σ (252 prior changes) |
| Gamma max distance from close | -14.3% |
| Delta neutral distance from close | -67.6% |
| Prior-year sessions closer to gamma max | 66.7% of 252 |
| Prior-year sessions closer to delta neutral | 37.7% 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 | +1.3% | -1.8% to +3.8% | 57% | -1.0% to +3.0% | 0.0% |
| above | Day +3 | 42 | +0.9% | -5.8% to +6.0% | 55% | -1.4% to +2.2% | 0.0% |
| above | Day +5 | 42 | +1.2% | -6.4% to +12.4% | 57% | -3.0% to +3.7% | 0.0% |
| above | Day +10 | 41 | -1.3% | -10.8% to +17.4% | 46% | -6.7% to +13.3% | 0.0% |
| below | Day +1 | 51 | +1.2% | -3.3% to +3.8% | 57% | -1.4% to +2.6% | 0.0% |
| below | Day +3 | 51 | -1.5% | -6.6% to +4.1% | 41% | -5.3% to +1.0% | 0.0% |
| below | Day +5 | 51 | -0.2% | -6.4% to +5.8% | 47% | -2.9% to +2.3% | 0.0% |
| below | Day +10 | 50 | +1.4% | -11.6% to +16.4% | 50% | -7.6% to +6.9% | 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/PACB.json)
- [Historical CSV](https://halfonadouble.com/api/v1/history/PACB.csv)
- [Public aggregate analysis](https://halfonadouble.com/api/v1/analysis/PACB.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).