Amphastar Pharmaceuticals (AMPH)'s 30-day implied volatility (IV30) was 56.3% at the close on October 26, 2026, down from 67.4% the day before, against a 52-week range of 26.0% to 72.3%. Its 20-day historical volatility was 40.2%.

Key numbers

30-day implied volatility (IV30): 56.3%
IV30 52-week range: 26.0% to 72.3% (median 39.4%)
Historical volatility: 20-day 40.2%, 1-year 43.0%
Implied move by the nearest expiration: ±4.3%

Data as of October 26, 2026.

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

Name: AMPH Implied Volatility
Creator: Market Chameleon