GM·General Motors Company

Realized volatility (21d)

37.3% 76th pct

Below its peak

-8.3%

vs 200-day average

+2.9%

Up days (1y)

52%

General Motors Company is currently running 37.3% annualised volatility over the last 21 sessions. Measured against GM's own 13 years of daily returns rather than a market-wide average, that is the 76th percentile — elevated for this stock, against a typical reading of 28.4%. 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.

GM is trading -8.3% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -26.8%, and the deepest was -54.0% in 2020. The current pullback is therefore shallower than what this stock gives back in a typical year, which is context worth having before treating it as a dislocation.

Price sits +2.9% from its 200-day moving average. Against every other day in its history, that gap ranks at the 54th percentile — close to the gap it normally carries. Over the past year GM closed higher on 52% of sessions, and it is currently 1 session into a falling streak.

On October specifically: over 14 years of records, GM finished the month higher 11 of 14 times, with a median return of +5.7% and an average of +5.7%. Its strongest month historically has been November at +6.5% on average, its weakest March at -3.4%. 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: GM has opened more than 2% away from the prior close in 68 of 3,268 sessions (2.1% of the time), with the largest gaps running +10.1% and -6.6%. 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, GM moved an average of 2.8% in the session after earnings, closing higher 1 of those 3 times, with a median move of -1.9% and a largest of +3.5%.

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