Annexon (ANNX)'s 30-day implied volatility (IV30) was 145.5% at the close on October 20, 2026, up from 77.3% the day before, against a 52-week range of 46.9% to 105.7%. Its 20-day historical volatility was 73.3%.
Key numbers
30-day implied volatility (IV30): 145.5%
IV30 52-week range: 46.9% to 105.7% (median 71.0%)
Historical volatility: 20-day 73.3%, 1-year 76.7%
Implied move by the nearest expiration: ±4.9%
Data as of October 20, 2026.
ANNX Implied Volatility (IV) vs Historical Volatility (HV)
The ANNX IV term structure shows the implied volatility difference between different maturity dates.
