First Interstate Bancsystem (FIBK)'s 30-day implied volatility (IV30) was 21.8% at the close on October 15, 2026, down from 23.6% the day before, against a 52-week range of 19.1% to 39.0%. Its 20-day historical volatility was 22.0%.

Key numbers

30-day implied volatility (IV30): 21.8%
IV30 52-week range: 19.1% to 39.0% (median 26.6%)
Historical volatility: 20-day 22.0%, 1-year 28.1%
Implied move by the nearest expiration: ±1.6%

Data as of October 15, 2026.

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

Name: FIBK Implied Volatility
Creator: Market Chameleon