Altimmune (ALT)'s 30-day implied volatility (IV30) was 61.9% at the close on October 20, 2026, up from 59.1% the day before, against a 52-week range of 37.7% to 186.7%. Its 20-day historical volatility was 51.8%.
Key numbers
30-day implied volatility (IV30): 61.9%
IV30 52-week range: 37.7% to 186.7% (median 71.1%)
Historical volatility: 20-day 51.8%, 1-year 65.1%
Implied move by the nearest expiration: ±3.7%
Data as of October 20, 2026.
ALT Implied Volatility (IV) vs Historical Volatility (HV)
The ALT IV term structure shows the implied volatility difference between different maturity dates.
