Acadia Pharmaceuticals (ACAD)'s 30-day implied volatility (IV30) was 42.5% at the close on October 20, 2026, down from 43.7% the day before, against a 52-week range of 23.0% to 114.7%. Its 20-day historical volatility was 43.2%.

Key numbers

30-day implied volatility (IV30): 42.5%
IV30 52-week range: 23.0% to 114.7% (median 39.4%)
Historical volatility: 20-day 43.2%, 1-year 38.1%
Implied move by the nearest expiration: ±2.8%

Data as of October 20, 2026.

ACAD Implied Volatility (IV) vs Historical Volatility (HV)

Name: ACAD Implied Volatility
Creator: Market Chameleon