# ARM: options-positioning snapshot

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

| Published field | Value |
| --- | --- |
| Close (USD/share) | 227.80 |
| Delta neutral (USD/share) | 262.25 |
| Gamma neutral (USD/share) | 279.36 |
| Gamma max (USD/share) | 364.71 |
| Open interest (contracts) | 793,099 |
| Nearest-expiration max pain (USD/share) | 250.00 (2026-10-23) |
| All-expiration max pain (USD/share) | 240.00 |
| Net gamma exposure | -14,009,247 |
| Confirmed GEX flip (USD/share) | 279.36 |
| Call wall (USD/share) | 330.00 |
| Put wall (USD/share) | 250.00 |
| Put/call open-interest ratio | 1.30 |
| Options catalyst-intensity score (0–100) | 61.9 |
| Options directional score (-100 to +100) | -31.3 |
| IV rank | 100.0 |
| Front-minus-back IV | 6.6 pp |
| Front 25-delta risk reversal | 7.1 pp |
| Call OI change, 1 session | -81,891 contracts · -19.2% |
| Put OI change, 1 session | -49,694 contracts · -10.0% |
| Call minus put OI growth, 1 session | -9.2 pp |
| Call OI change, 5 sessions | -44,530 contracts · -11.4% |
| Put OI change, 5 sessions | -9,516 contracts · -2.1% |
| Call minus put OI growth, 5 sessions | -9.3 pp |
| Daily call OI change surprise | -3.39σ (252 prior changes) |
| Daily put OI change surprise | -2.41σ (252 prior changes) |
| Daily call-minus-put growth surprise | -3.78σ (252 prior changes) |
| Daily open interest change (contracts) | -131,585 |
| Daily open interest change z-score (prior 252) | -3.00σ (252 prior changes) |
| Gamma max distance from close | +60.1% |
| Delta neutral distance from close | +15.1% |
| Prior-year sessions closer to gamma max | 99.2% of 252 |
| Prior-year sessions closer to delta neutral | 95.6% 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 | 12 | +3.4% | -3.5% to +10.8% | 58% | -5.0% 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)
- [Public aggregate analysis](https://halfonadouble.com/api/v1/analysis/ARM.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).