# WDC: options-positioning snapshot

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

| Published field | Value |
| --- | --- |
| Close (USD/share) | 415.29 |
| Delta neutral (USD/share) | 435.02 |
| Gamma neutral (USD/share) | 455.46 |
| Gamma max (USD/share) | 561.16 |
| Open interest (contracts) | 401,801 |
| Nearest-expiration max pain (USD/share) | 457.50 (2026-10-09) |
| All-expiration max pain (USD/share) | 430.00 |
| Net gamma exposure | -5,218,324 |
| Confirmed GEX flip (USD/share) | 455.46 |
| Call wall (USD/share) | 420.00 |
| Put wall (USD/share) | 400.00 |
| Put/call open-interest ratio | 1.56 |
| Options catalyst-intensity score (0–100) | 51.5 |
| Options directional score (-100 to +100) | -20.7 |
| IV rank | 94.9 |
| Front ATM IV | +64.2% |
| Front-minus-back IV | -5.6 pp |
| Front expected move | +8.9% |
| Front ATM straddle / spot | +6.5% |
| Front 25-delta risk reversal | -0.2 pp |
| Call OI change, 1 session | -16,226 contracts · -9.4% |
| Put OI change, 1 session | -11,585 contracts · -4.5% |
| Call minus put OI growth, 1 session | -4.8 pp |
| Call OI change, 5 sessions | +751 contracts · +0.5% |
| Put OI change, 5 sessions | +4,457 contracts · +1.9% |
| Call minus put OI growth, 5 sessions | -1.4 pp |
| Daily call OI change surprise | -1.18σ (252 prior changes) |
| Daily put OI change surprise | -0.81σ (252 prior changes) |
| Daily call-minus-put growth surprise | -1.60σ (252 prior changes) |
| Daily open interest change (contracts) | -27,811 |
| Daily open interest change z-score (prior 252) | -1.01σ (252 prior changes) |
| Gamma max distance from close | +35.1% |
| Delta neutral distance from close | +4.8% |
| Prior-year sessions closer to gamma max | 93.7% of 252 |
| Prior-year sessions closer to delta neutral | 27.8% of 252 |

## Historical gamma-max cross outcomes

| Direction | Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| above | Day +1 | 46 | +0.0% | -1.8% to +1.5% | 52% | -1.1% to +1.0% | 0.0% |
| above | Day +3 | 46 | +0.5% | -1.3% to +4.5% | 57% | -0.5% to +1.9% | 0.0% |
| above | Day +5 | 46 | +1.9% | -3.4% to +6.3% | 57% | -1.4% to +3.4% | 0.0% |
| above | Day +10 | 46 | +0.9% | -4.2% to +10.3% | 52% | -2.0% to +6.4% | 0.0% |
| below | Day +1 | 44 | +0.5% | -1.5% to +1.7% | 57% | -0.4% to +1.0% | 0.0% |
| below | Day +3 | 44 | +2.6% | -1.2% to +3.5% | 68% | +0.8% to +3.3% | +0.8% |
| below | Day +5 | 44 | +2.8% | -3.7% to +6.6% | 57% | -0.5% to +5.5% | 0.0% |
| below | Day +10 | 44 | +2.8% | -1.0% to +10.3% | 68% | +1.3% to +4.7% | +1.3% |

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