Comcast Corp (CMCSA) Historical Volatility

Tracking CMCSA historical volatility helps you see how much Comcast Corp's stock price has actually moved over past periods, giving you a baseline to judge whether current option premiums are fair, cheap, or expensive. While implied volatility tells you what the market expects, Comcast Corp's HV tells you what really happened. Use our scanner to monitor CMCSA 30 day historical volatility alongside longer lookback windows and spot the moments when realized and implied diverge.

Historical volatility is the annualized standard deviation of an underlying's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. The CMCSA 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Comcast Corp's HV to its implied volatility reveals the volatility risk premium — when IV sits well above HV, option sellers tend to have an edge; when HV runs hot relative to IV, buyers may be underpaying for movement.

Comcast Corporation operates as a media and technology company worldwide. It operates through Cable Communications, Media, Studios, Theme Parks, and Sky segments. The Cable Communications segment offers broadband, video, voice, wireless, and other services to residential and business customers under the Xfinity brand; and advertising services. The Media segment operates NBCUniversal's television and streaming platforms, including national, regional, and international cable networks, the NBC and Telemundo broadcast, and Peacock networks. The Studios segment operates NBCUniversal's film and television studio production and distribution operations.

The Theme Parks segment operates Universal theme parks in Orlando, Florida; Hollywood, California; Osaka, Japan; and Beijing, China. The Sky segment offers direct-to-consumer services, such as video, broadband, voice and wireless phone services, and content business operates entertainment networks, the Sky News broadcast network, and Sky Sports networks. The company also owns the Philadelphia Flyers, as well as the Wells Fargo Center arena in Philadelphia, Pennsylvania; and provides streaming service, such as Peacock. Comcast Corporation was founded in 1963 and is headquartered in Philadelphia, Pennsylvania.

Sizing a long premium trade, modeling a covered call, or hunting volatility arbitrage all come back to one question: how much has the stock actually moved? Our scanner puts Comcast Corp's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where CMCSA HV is running hot, cold, or in line. Make the CMCSA 30 day historical volatility — and every other window — work for your edge instead of against it.