FAS implied volatility
From the closing options book · October 20, 2026 · updated after every close
FAS's at-the-money implied volatility was 50.2% at the October 20, 2026 close. Over the past 88 sessions it ranged from 33.0% to 55.1%, putting today's level at an IV rank of 78 and IV percentile of 81.
FAS at-the-money IV, last 60 sessions
Options were pricing more movement than FAS actually delivered over the last 20 sessions (50.2% implied against 34.3% 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 FAS's own closing history.
These are the October 20, 2026 closing numbers. Members see FAS's map move live all session.
Common questions
50.2% at the money at the October 20, 2026 close.
78 over the past 88 sessions (IV percentile 81).
Its IV percentile is 81: 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.