T implied volatility
From the closing options book · October 20, 2026 · updated after every close
T's at-the-money implied volatility was 37.1% at the October 20, 2026 close. Over the past 139 sessions it ranged from 16.4% to 49.4%, putting today's level at an IV rank of 63 and IV percentile of 93.
T at-the-money IV, last 60 sessions
Options were pricing less movement than T actually delivered over the last 20 sessions (37.1% implied against 43.9% 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 T's own closing history.
These are the October 20, 2026 closing numbers. Members see T's map move live all session.
Common questions
37.1% at the money at the October 20, 2026 close.
63 over the past 139 sessions (IV percentile 93).
Its IV percentile is 93: 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.