# GFL: options-positioning snapshot

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

| Published field | Value |
| --- | --- |
| Close (USD/share) | 41.98 |
| Delta neutral (USD/share) | 32.11 |
| Gamma neutral (USD/share) | 23.88 |
| Gamma max (USD/share) | 44.93 |
| Open interest (contracts) | 386,262 |
| Nearest-expiration max pain (USD/share) | 40.00 (2026-10-16) |
| All-expiration max pain (USD/share) | 40.00 |
| Net gamma exposure | 50,411,895 |
| Confirmed GEX flip (USD/share) | 23.88 |
| Call wall (USD/share) | 45.00 |
| Put wall (USD/share) | 40.00 |
| Put/call open-interest ratio | 0.10 |
| Options catalyst-intensity score (0–100) | 80.7 |
| Options directional score (-100 to +100) | 39.8 |
| IV rank | 27.1 |
| Front ATM IV | +81.0% |
| Front-minus-back IV | 7.4 pp |
| Front expected move | +15.9% |
| Front ATM straddle / spot | +12.1% |
| Front 25-delta risk reversal | -23.8 pp |
| Call OI change, 1 session | +42,397 contracts · +13.8% |
| Put OI change, 1 session | +3,605 contracts · +11.0% |
| Call minus put OI growth, 1 session | +2.8 pp |
| Call OI change, 5 sessions | +131,134 contracts · +60.0% |
| Put OI change, 5 sessions | +15,345 contracts · +72.7% |
| Call minus put OI growth, 5 sessions | -12.8 pp |
| Daily call OI change surprise | +6.43σ (252 prior changes) |
| Daily put OI change surprise | +1.51σ (252 prior changes) |
| Daily call-minus-put growth surprise | — (129 prior changes) |
| Daily open interest change (contracts) | 46,002 |
| Daily open interest change z-score (prior 252) | +5.89σ (252 prior changes) |
| Gamma max distance from close | +7.0% |
| Delta neutral distance from close | -23.5% |
| Prior-year sessions closer to gamma max | 26.2% of 252 |
| Prior-year sessions closer to delta neutral | 100.0% of 252 |

## Historical gamma-max cross outcomes

| Direction | Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| above | Day +1 | 33 | -0.1% | -1.0% to +1.0% | 48% | -0.7% to +0.5% | 0.0% |
| above | Day +3 | 33 | -0.9% | -1.4% to +1.2% | 45% | -1.3% to +0.6% | 0.0% |
| above | Day +5 | 33 | -0.6% | -1.9% to +2.1% | 45% | -1.4% to +1.4% | 0.0% |
| above | Day +10 | 33 | +0.3% | -1.8% to +1.9% | 52% | -1.5% to +1.4% | 0.0% |
| below | Day +1 | 32 | -0.1% | -0.6% to +0.9% | 47% | -0.4% to +0.4% | 0.0% |
| below | Day +3 | 32 | +0.0% | -1.3% to +1.3% | 50% | -0.7% to +0.7% | 0.0% |
| below | Day +5 | 32 | +0.2% | -1.3% to +1.4% | 53% | -0.9% to +0.7% | 0.0% |
| below | Day +10 | 32 | +0.2% | -1.4% to +3.0% | 53% | -1.1% to +2.4% | 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/GFL.json)
- [Historical CSV](https://halfonadouble.com/api/v1/history/GFL.csv)
- [Complete advanced analysis](https://halfonadouble.com/api/v1/analysis/GFL.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).