Costco Wholesale (COST)'s 30-day implied volatility (IV30) was 18.1% at the close on October 21, 2026, down from 18.3% the day before, against a 52-week range of 17.6% to 30.0%. Its 20-day historical volatility was 18.6%.

Key numbers

30-day implied volatility (IV30): 18.1%
IV30 52-week range: 17.6% to 30.0% (median 22.2%)
Historical volatility: 20-day 18.6%, 1-year 20.6%
Implied move by the nearest expiration: ±1.1%

Data as of October 21, 2026.

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

Name: COST Implied Volatility
Creator: Market Chameleon