Acadia Healthcare Company (ACHC)'s 30-day implied volatility (IV30) was 58.0% at the close on October 21, 2026, down from 59.5% the day before, against a 52-week range of 36.8% to 97.4%. Its 20-day historical volatility was 44.0%.

Key numbers

30-day implied volatility (IV30): 58.0%
IV30 52-week range: 36.8% to 97.4% (median 61.4%)
Historical volatility: 20-day 44.0%, 1-year 58.8%
Implied move by the nearest expiration: ±3.7%

Data as of October 21, 2026.

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

Name: ACHC Implied Volatility
Creator: Market Chameleon