Annexon (ANNX)'s 30-day implied volatility (IV30) was 114.1% at the close on October 21, 2026, down from 145.5% the day before, against a 52-week range of 46.9% to 145.5%. Its 20-day historical volatility was 74.2%.
Key numbers
30-day implied volatility (IV30): 114.1%
IV30 52-week range: 46.9% to 145.5% (median 71.0%)
Historical volatility: 20-day 74.2%, 1-year 76.6%
Implied move by the nearest expiration: ±9.2%
Data as of October 21, 2026.
ANNX Implied Volatility (IV) vs Historical Volatility (HV)
The ANNX IV term structure shows the implied volatility difference between different maturity dates.
