ARM implied volatility
From the closing options book · October 20, 2026 · updated after every close
ARM's at-the-money implied volatility was 79.2% at the October 20, 2026 close. Over the past 245 sessions it ranged from 40.0% to 135.0%, putting today's level at an IV rank of 41 and IV percentile of 69.
ARM at-the-money IV, last 60 sessions
Options were pricing more movement than ARM actually delivered over the last 20 sessions (79.2% implied against 70.6% realized).
IV rank places today's IV between the period's low (0) and high (100); IV percentile is the share of sessions with lower IV. Both use ARM's own closing history.
These are the October 20, 2026 closing numbers. Members see ARM's map move live all session.
Common questions
79.2% at the money at the October 20, 2026 close.
41 over the past 245 sessions (IV percentile 69).
Its IV percentile is 69: middling against its own past year.
Compare: implied volatility on other tickers
Measured from the closing options book and rebuilt after every close. Nothing on this page is live. Levels are where dealer hedging is concentrated, not targets or forecasts. Not investment advice.