TMF implied volatility
From the closing options book · October 20, 2026 · updated after every close
TMF's at-the-money implied volatility was 40.6% at the October 20, 2026 close. Over the past 54 sessions it ranged from 23.3% to 50.3%, putting today's level at an IV rank of 64 and IV percentile of 85.
TMF at-the-money IV, last 60 sessions
Options were pricing more movement than TMF actually delivered over the last 20 sessions (40.6% implied against 34.5% 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 TMF's own closing history.
These are the October 20, 2026 closing numbers. Members see TMF's map move live all session.
Common questions
40.6% at the money at the October 20, 2026 close.
64 over the past 54 sessions (IV percentile 85).
Its IV percentile is 85: 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.