ACHR·Archer Aviation Inc.

Realized volatility (21d)

48.3% 17th pct

Below its peak

-74.5%

vs 200-day average

-26.9%

Up days (1y)

44%

Archer Aviation Inc. is currently running 48.3% annualised volatility over the last 21 sessions. Measured against ACHR's own 6 years of daily returns rather than a market-wide average, that is the 17th percentile — unusually subdued by its own history, against a typical reading of 70.7%. 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.

ACHR is trading -74.5% below its running peak. Across 5 full years on file, its median worst-drawdown-in-a-year was -50.4%, and the deepest was -73.0% 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 -26.9% from its 200-day moving average. Against every other day in its history, that gap ranks at the 31st percentile — close to the gap it normally carries. Over the past year ACHR closed higher on 44% of sessions, and it is currently 1 session into a rising streak.

On October specifically: over 6 years of records, ACHR finished the month higher 3 of 6 times, with a median return of -2.3% and an average of -3.7%. Its strongest month historically has been November at +34.5% on average, its weakest September at -11.4%. 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: ACHR has opened more than 2% away from the prior close in 269 of 1,460 sessions (18.4% of the time), with the largest gaps running +10.3% and -10.6%. For anyone holding through an event, that rate is a better guide to overnight exposure than the intraday range.

All figures computed from 1,461 daily closes between 2020-12-18 and 2026-10-14, split-adjusted, recomputed daily. Percentiles are against ACHR's own 6-year history, not a peer group or index.