VST implied volatility
From the closing options book · October 20, 2026 · updated after every close
VST's at-the-money implied volatility was 52.9% at the October 20, 2026 close. Over the past 189 sessions it ranged from 38.7% to 106.3%, putting today's level at an IV rank of 21 and IV percentile of 41.
VST at-the-money IV, last 60 sessions
Options were pricing less movement than VST actually delivered over the last 20 sessions (52.9% implied against 57.3% 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 VST's own closing history.
These are the October 20, 2026 closing numbers. Members see VST's map move live all session.
Common questions
52.9% at the money at the October 20, 2026 close.
21 over the past 189 sessions (IV percentile 41).
Its IV percentile is 41: 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.