IRM·Iron Mountain Incorporated

Realized volatility (21d)

26.5% 57th pct

Below its peak

-14.5%

vs 200-day average

+1.2%

Up days (1y)

52%

Iron Mountain Incorporated is currently running 26.5% annualised volatility over the last 21 sessions. Measured against IRM's own 13 years of daily returns rather than a market-wide average, that is the 57th percentile — close to its own typical level, against a typical reading of 25.4%. 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.

IRM is trading -14.5% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -20.6%, and the deepest was -37.5% 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 +1.2% from its 200-day moving average. Against every other day in its history, that gap ranks at the 43rd percentile — close to the gap it normally carries. Over the past year IRM closed higher on 52% of sessions, and it is currently 1 session into a falling streak.

On October specifically: over 13 years of records, IRM finished the month higher 9 of 13 times, with a median return of +1.3% and an average of +1.2%. Its strongest month historically has been April at +3.3% on average, its weakest September at -2.1%. 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: IRM has opened more than 2% away from the prior close in 113 of 3,267 sessions (3.5% of the time), with the largest gaps running +5.0% and -4.9%. 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, IRM moved an average of 3.3% in the session after earnings, closing higher 2 of those 3 times, with a median move of +1.4% and a largest of +4.3%.

All figures computed from 3,268 daily closes between 2013-10-15 and 2026-10-13, split-adjusted, recomputed daily. Percentiles are against IRM's own 13-year history, not a peer group or index.