Biogen (BIIB)'s 30-day implied volatility (IV30) was 47.5% at the close on November 9, 2026, up from 45.1% the day before, against a 52-week range of 28.2% to 49.5%. Its 20-day historical volatility was 40.7%.
Key numbers
30-day implied volatility (IV30): 47.5%
IV30 52-week range: 28.2% to 49.5% (median 33.8%)
Historical volatility: 20-day 40.7%, 1-year 33.8%
Implied move by the nearest expiration: ±2.6%
Data as of November 9, 2026.
BIIB Implied Volatility (IV) vs Historical Volatility (HV)
The BIIB IV term structure shows the implied volatility difference between different maturity dates.
