KLAC implied volatility
From the closing options book · October 20, 2026 · updated after every close
KLAC's at-the-money implied volatility was 62.7% at the October 20, 2026 close. Over the past 238 sessions it ranged from 37.6% to 110.6%, putting today's level at an IV rank of 34 and IV percentile of 70.
KLAC at-the-money IV, last 60 sessions
Options were pricing more movement than KLAC actually delivered over the last 20 sessions (62.7% implied against 39.4% 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 KLAC's own closing history.
These are the October 20, 2026 closing numbers. Members see KLAC's map move live all session.
Common questions
62.7% at the money at the October 20, 2026 close.
34 over the past 238 sessions (IV percentile 70).
Its IV percentile is 70: high 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.