Comcast - Class A (CMCSA)'s 30-day implied volatility (IV30) was 36.4% at the close on October 23, 2026, up from 35.2% the day before, against a 52-week range of 18.2% to 43.4%. Its 20-day historical volatility was 26.5%.

Key numbers

30-day implied volatility (IV30): 36.4%
IV30 52-week range: 18.2% to 43.4% (median 31.7%)
Historical volatility: 20-day 26.5%, 1-year 29.4%
Implied move by the nearest expiration: ±3.0%

Data as of October 23, 2026.

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

Name: CMCSA Implied Volatility
Creator: Market Chameleon