# ALAB: options-positioning snapshot

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

| Published field | Value |
| --- | --- |
| Close (USD/share) | 350.33 |
| Delta neutral (USD/share) | 302.64 |
| Gamma neutral (USD/share) | 312.29 |
| Gamma max (USD/share) | 394.41 |
| Open interest (contracts) | 225,421 |
| Nearest-expiration max pain (USD/share) | 330.00 (2026-10-09) |
| All-expiration max pain (USD/share) | 240.00 |
| Net gamma exposure | 3,298,854 |
| Confirmed GEX flip (USD/share) | 312.29 |
| Call wall (USD/share) | 400.00 |
| Put wall (USD/share) | 300.00 |
| Put/call open-interest ratio | 0.84 |
| Options catalyst-intensity score (0–100) | 54.5 |
| Options directional score (-100 to +100) | 1.8 |
| IV rank | 70.7 |
| Front ATM IV | +79.2% |
| Front-minus-back IV | -6.7 pp |
| Front expected move | +11.0% |
| Front ATM straddle / spot | +7.9% |
| Front 25-delta risk reversal | -3.5 pp |
| Call OI change, 1 session | -15,698 contracts · -11.3% |
| Put OI change, 1 session | -10,536 contracts · -9.3% |
| Call minus put OI growth, 1 session | -2.0 pp |
| Call OI change, 5 sessions | -1,675 contracts · -1.3% |
| Put OI change, 5 sessions | +3,218 contracts · +3.2% |
| Call minus put OI growth, 5 sessions | -4.6 pp |
| Daily call OI change surprise | -1.63σ (252 prior changes) |
| Daily put OI change surprise | -1.21σ (252 prior changes) |
| Daily call-minus-put growth surprise | -0.80σ (252 prior changes) |
| Daily open interest change (contracts) | -26,234 |
| Daily open interest change z-score (prior 252) | -1.45σ (252 prior changes) |
| Gamma max distance from close | +12.6% |
| Delta neutral distance from close | -13.6% |
| Prior-year sessions closer to gamma max | 38.5% of 252 |
| Prior-year sessions closer to delta neutral | 69.0% of 252 |

## Historical gamma-max cross outcomes

| Direction | Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| above | Day +1 | 18 | -1.3% | -3.5% to +1.1% | 33% | -2.8% to +1.1% | 0.0% |
| above | Day +3 | 18 | +1.0% | -5.2% to +7.4% | 56% | -0.9% to +6.1% | 0.0% |
| above | Day +5 | 18 | +2.2% | -3.8% to +10.1% | 61% | -1.5% to +7.1% | 0.0% |
| above | Day +10 | 16 | +16.4% | +8.7% to +22.3% | 88% | +9.8% to +21.5% | +9.8% |
| below | Day +1 | 18 | +1.7% | -1.5% to +5.0% | 67% | -1.2% to +4.9% | 0.0% |
| below | Day +3 | 18 | +2.2% | -2.5% to +7.0% | 56% | -2.4% to +7.0% | 0.0% |
| below | Day +5 | 18 | +1.4% | -1.8% to +11.5% | 61% | -1.2% to +11.3% | 0.0% |
| below | Day +10 | 16 | +16.1% | +7.2% to +25.8% | 100% | +7.3% to +25.4% | +7.3% |

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/ALAB.json)
- [Historical CSV](https://halfonadouble.com/api/v1/history/ALAB.csv)
- [Complete advanced analysis](https://halfonadouble.com/api/v1/analysis/ALAB.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).