OC·Owens Corning Inc Common Stock New

Realized volatility (21d)

33.0% 66th pct

Below its peak

-45.9%

vs 200-day average

-9.7%

Up days (1y)

45%

Owens Corning Inc Common Stock New is currently running 33.0% annualised volatility over the last 21 sessions. Measured against OC's own 13 years of daily returns rather than a market-wide average, that is the 66th percentile — a little above its own norm, against a typical reading of 29.0%. 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.

OC is trading -45.9% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -23.4%, and the deepest was -57.2% in 2018. 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 -9.7% from its 200-day moving average. Against every other day in its history, that gap ranks at the 19th percentile — a narrower gap than it typically runs. Over the past year OC closed higher on 45% of sessions, and it is currently 2 sessions into a rising streak.

On October specifically: over 14 years of records, OC finished the month higher 6 of 14 times, with a median return of -1.6% and an average of -2.3%. Its strongest month historically has been November at +5.4% on average, its weakest September at -2.5%. 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: OC has opened more than 2% away from the prior close in 182 of 3,268 sessions (5.6% of the time), with the largest gaps running +12.5% and -12.2%. For anyone holding through an event, that rate is a better guide to overnight exposure than the intraday range.

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