ZTS implied volatility
From the closing options book · October 20, 2026 · updated after every close
ZTS's at-the-money implied volatility was 47.6% at the October 20, 2026 close. Over the past 52 sessions it ranged from 24.8% to 56.1%, putting today's level at an IV rank of 73 and IV percentile of 85.
ZTS at-the-money IV, last 60 sessions
Options were pricing more movement than ZTS actually delivered over the last 20 sessions (47.6% implied against 26.0% 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 ZTS's own closing history.
These are the October 20, 2026 closing numbers. Members see ZTS's map move live all session.
Common questions
47.6% at the money at the October 20, 2026 close.
73 over the past 52 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.