OC·Owens Corning Inc Common Stock New

Realized volatility (21d)

37.8% 79th pct

Below its peak

-44.3%

vs 200-day average

-6.9%

Up days (1y)

44%

Owens Corning Inc Common Stock New is currently running 37.8% 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 79th percentile — elevated for this stock, against a typical reading of 28.9%. 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 -44.3% 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 -6.9% from its 200-day moving average. Against every other day in its history, that gap ranks at the 23rd percentile — a narrower gap than it typically runs. Over the past year OC closed higher on 44% of sessions, and it is currently 1 session into a falling streak.

On October specifically: over 13 years of records, OC finished the month higher 6 of 13 times, with a median return of -0.6% and an average of -2.0%. 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 3,267 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 3,268 daily closes between 2013-10-07 and 2026-10-05, split-adjusted, recomputed daily. Percentiles are against OC's own 13-year history, not a peer group or index.