CMCSA·Comcast Corporation

Realized volatility (21d)

21.8% 49th pct

Below its peak

-63.9%

vs 200-day average

-21.0%

Up days (1y)

51%

Comcast Corporation is currently running 21.8% annualised volatility over the last 21 sessions. Measured against CMCSA's own 13 years of daily returns rather than a market-wide average, that is the 49th percentile — close to its own typical level, against a typical reading of 21.9%. The distinction matters because a number that looks calm for one stock is turbulent for another, and the absolute figure on its own tells you neither.

CMCSA is trading -63.9% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -19.8%, and the deepest was -44.5% in 2022. The current drawdown is already deeper than this stock's typical annual low point, which puts it in the part of its range where past recoveries began — and where past declines also continued.

Price sits -21.0% from its 200-day moving average. Against every other day in its history, that gap ranks at the 2nd percentile — a narrower gap than it typically runs. Over the past year CMCSA closed higher on 51% of sessions, and it is currently 3 sessions into a rising streak.

On October specifically: over 14 years of records, CMCSA finished the month higher 7 of 14 times, with a median return of -1.5% and an average of -1.4%. Its strongest month historically has been November at +4.1% on average, its weakest September at -4.0%. Seasonality is a weak signal on its own — a decade is a small sample and regimes change — but it is a real distribution rather than a rule of thumb.

Overnight risk is measurable too: CMCSA has opened more than 2% away from the prior close in 54 of 3,268 sessions (1.7% of the time), with the largest gaps running +9.4% and -7.2%. For anyone holding through an event, that rate is a better guide to overnight exposure than the intraday range.

Across the last 3 dated reports on file, CMCSA moved an average of 5.2% in the session after earnings, closing higher 2 of those 3 times, with a median move of +1.5% and a largest of -11.8%.

All figures computed from 3,269 daily closes between 2013-10-15 and 2026-10-14, split-adjusted, recomputed daily. Percentiles are against CMCSA's own 13-year history, not a peer group or index.