BIL implied volatility
From the closing options book · October 20, 2026 · updated after every close
BIL's at-the-money implied volatility was 3.7% at the October 20, 2026 close. Over the past 171 sessions it ranged from 0.4% to 26.3%, putting today's level at an IV rank of 13 and IV percentile of 42.
BIL at-the-money IV, last 60 sessions
Options were pricing more movement than BIL actually delivered over the last 20 sessions (3.7% implied against 0.9% 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 BIL's own closing history.
These are the October 20, 2026 closing numbers. Members see BIL's map move live all session.
Common questions
3.7% at the money at the October 20, 2026 close.
13 over the past 171 sessions (IV percentile 42).
Its IV percentile is 42: 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.