First Interstate Bancsystem (FIBK)'s 30-day implied volatility (IV30) was 29.7% at the close on November 5, 2026, up from 23.5% the day before, against a 52-week range of 16.2% to 39.0%. Its 20-day historical volatility was 24.8%.

Key numbers

30-day implied volatility (IV30): 29.7%
IV30 52-week range: 16.2% to 39.0% (median 26.4%)
Historical volatility: 20-day 24.8%, 1-year 27.3%
Implied move by the nearest expiration: ±1.5%

Data as of November 5, 2026.

FIBK Implied Volatility (IV) vs Historical Volatility (HV)

Name: FIBK Implied Volatility
Creator: Market Chameleon