# ARM: options-positioning snapshot

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

| Published field | Value |
| --- | --- |
| Close (USD/share) | 307.49 |
| Delta neutral (USD/share) | 279.42 |
| Gamma neutral (USD/share) | 280.16 |
| Gamma max (USD/share) | 345.85 |
| Open interest (contracts) | 810,725 |
| Nearest-expiration max pain (USD/share) | 285.00 (2026-10-09) |
| All-expiration max pain (USD/share) | 240.00 |
| Net gamma exposure | 9,163,649 |
| Confirmed GEX flip (USD/share) | 280.16 |
| Call wall (USD/share) | 320.00 |
| Put wall (USD/share) | 250.00 |
| Put/call open-interest ratio | 1.13 |
| Options catalyst-intensity score (0–100) | 48.3 |
| Options directional score (-100 to +100) | -9.5 |
| IV rank | 100.0 |
| Front ATM IV | +67.6% |
| Front-minus-back IV | -6.8 pp |
| Front expected move | +9.4% |
| Front ATM straddle / spot | +6.9% |
| Front 25-delta risk reversal | -2.7 pp |
| Call OI change, 1 session | -41,931 contracts · -9.9% |
| Put OI change, 1 session | -23,473 contracts · -5.2% |
| Call minus put OI growth, 1 session | -4.8 pp |
| Call OI change, 5 sessions | +2,964 contracts · +0.8% |
| Put OI change, 5 sessions | +26,541 contracts · +6.6% |
| Call minus put OI growth, 5 sessions | -5.8 pp |
| Daily call OI change surprise | -1.74σ (252 prior changes) |
| Daily put OI change surprise | -1.14σ (252 prior changes) |
| Daily call-minus-put growth surprise | -1.96σ (252 prior changes) |
| Daily open interest change (contracts) | -65,404 |
| Daily open interest change z-score (prior 252) | -1.50σ (252 prior changes) |
| Gamma max distance from close | +12.5% |
| Delta neutral distance from close | -9.1% |
| Prior-year sessions closer to gamma max | 29.8% of 252 |
| Prior-year sessions closer to delta neutral | 60.3% of 252 |

## Historical gamma-max cross outcomes

| Direction | Horizon | n | Median | Middle 50% | Above zero | Nominal ≥90% median interval | Confidence floor |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| above | Day +1 | 13 | -1.4% | -3.0% to +1.1% | 38% | -3.0% to +1.1% | 0.0% |
| above | Day +3 | 13 | -1.8% | -6.3% to +5.3% | 46% | -6.3% to +5.3% | 0.0% |
| above | Day +5 | 13 | +0.7% | -5.9% to +5.7% | 54% | -5.9% to +5.7% | 0.0% |
| above | Day +10 | 13 | +6.2% | -3.7% to +9.7% | 69% | -3.7% to +9.7% | 0.0% |
| below | Day +1 | 12 | -0.5% | -3.4% to +1.4% | 33% | -4.5% to +1.5% | 0.0% |
| below | Day +3 | 12 | -2.6% | -3.8% to +5.0% | 42% | -4.1% to +8.2% | 0.0% |
| below | Day +5 | 12 | +0.9% | -3.7% to +6.1% | 58% | -5.4% to +6.1% | 0.0% |
| below | Day +10 | 11 | +4.1% | -2.3% to +11.5% | 64% | -3.0% to +13.0% | 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/ARM.json)
- [Historical CSV](https://halfonadouble.com/api/v1/history/ARM.csv)
- [Complete advanced analysis](https://halfonadouble.com/api/v1/analysis/ARM.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).