GRMN·Garmin Ltd.

Realized volatility (21d)

21.3% 42nd pct

Below its peak

-12.4%

vs 200-day average

+13.3%

Up days (1y)

52%

Garmin Ltd. is currently running 21.3% annualised volatility over the last 21 sessions. Measured against GRMN's own 13 years of daily returns rather than a market-wide average, that is the 42nd percentile — close to its own typical level, against a typical reading of 22.8%. 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.

GRMN is trading -12.4% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -18.1%, and the deepest was -44.1% in 2015. 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 +13.3% from its 200-day moving average. Against every other day in its history, that gap ranks at the 72nd percentile — a somewhat wider gap than its own norm. Over the past year GRMN closed higher on 52% of sessions, and it is currently 5 sessions into a falling streak.

On September specifically: over 13 years of records, GRMN finished the month higher 4 of 13 times, with a median return of -1.5% and an average of -1.9%. Its strongest month historically has been February at +6.0% on average, its weakest September at -1.9%. 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: GRMN has opened more than 2% away from the prior close in 132 of 3,267 sessions (4.0% of the time), with the largest gaps running +10.8% and -10.6%. 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, GRMN moved an average of 0.5% in the session after earnings, closing higher 1 of those 3 times, with a median move of -0.2% and a largest of +0.9%.

All figures computed from 3,268 daily closes between 2013-09-20 and 2026-09-18, split-adjusted, recomputed daily. Percentiles are against GRMN's own 13-year history, not a peer group or index.