Biogen (BIIB)'s 30-day implied volatility (IV30) was 40.1% at the close on October 16, 2026, down from 40.2% the day before, against a 52-week range of 28.2% to 49.5%. Its 20-day historical volatility was 31.3%.
Key numbers
30-day implied volatility (IV30): 40.1%
IV30 52-week range: 28.2% to 49.5% (median 33.9%)
Historical volatility: 20-day 31.3%, 1-year 33.1%
Implied move by the nearest expiration: ±1.6%
Data as of October 16, 2026.
BIIB Implied Volatility (IV) vs Historical Volatility (HV)
The BIIB IV term structure shows the implied volatility difference between different maturity dates.
