MLM·Martin Marietta Materials, Inc.

Realized volatility (21d)

20.9% 27th pct

Below its peak

-31.4%

vs 200-day average

-17.6%

Up days (1y)

50%

Martin Marietta Materials, Inc. is currently running 20.9% annualised volatility over the last 21 sessions. Measured against MLM's own 13 years of daily returns rather than a market-wide average, that is the 27th percentile — on the quiet side for this stock, against a typical reading of 25.6%. 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.

MLM is trading -31.4% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -20.8%, and the deepest was -48.1% in 2020. 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 -17.6% from its 200-day moving average. Against every other day in its history, that gap ranks at the 4th percentile — a narrower gap than it typically runs. Over the past year MLM closed higher on 50% of sessions, and it is currently 2 sessions into a rising streak.

On October specifically: over 13 years of records, MLM finished the month higher 8 of 13 times, with a median return of +0.8% and an average of +2.4%. Its strongest month historically has been February at +3.4% on average, its weakest September at -2.2%. 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: MLM has opened more than 2% away from the prior close in 134 of 3,267 sessions (4.1% of the time), with the largest gaps running +33.7% and -9.5%. 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, MLM moved an average of 1.2% in the session after earnings, closing higher 0 of those 3 times, with a median move of -0.7% and a largest of -2.7%.

All figures computed from 3,268 daily closes between 2013-10-07 and 2026-10-05, split-adjusted, recomputed daily. Percentiles are against MLM's own 13-year history, not a peer group or index.