SDOW implied volatility
From the closing options book · October 20, 2026 · updated after every close
SDOW's at-the-money implied volatility was 49.5% at the October 20, 2026 close. Over the past 21 sessions it ranged from 33.1% to 74.9%, putting today's level at an IV rank of 39 and IV percentile of 76.
SDOW at-the-money IV, last 60 sessions
Options were pricing more movement than SDOW actually delivered over the last 20 sessions (49.5% implied against 27.5% 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 SDOW's own closing history.
These are the October 20, 2026 closing numbers. Members see SDOW's map move live all session.
Common questions
49.5% at the money at the October 20, 2026 close.
39 over the past 21 sessions (IV percentile 76).
Its IV percentile is 76: 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.