ACMR implied volatility
From the closing options book · October 20, 2026 · updated after every close
ACMR's at-the-money implied volatility was 89.8% at the October 20, 2026 close. Over the past 73 sessions it ranged from 71.2% to 174.6%, putting today's level at an IV rank of 18 and IV percentile of 38.
ACMR at-the-money IV, last 60 sessions
Options were pricing more movement than ACMR actually delivered over the last 20 sessions (89.8% implied against 76.0% 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 ACMR's own closing history.
These are the October 20, 2026 closing numbers. Members see ACMR's map move live all session.
Common questions
89.8% at the money at the October 20, 2026 close.
18 over the past 73 sessions (IV percentile 38).
Its IV percentile is 38: 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.