BLDR·Builders FirstSource, Inc.

Realized volatility (21d)

72.5% 95th pct

Below its peak

-67.1%

vs 200-day average

-12.8%

Up days (1y)

41%

Builders FirstSource, Inc. is currently running 72.5% annualised volatility over the last 21 sessions. Measured against BLDR's own 12 years of daily returns rather than a market-wide average, that is the 95th percentile — an extreme by its own standards, against a typical reading of 41.4%.

BLDR is trading -67.1% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -41.4%, and the deepest was -62.1% 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 -12.8% from its 200-day moving average. Against every other day in its history, that gap ranks at the 21st percentile — a narrower gap than it typically runs. Over the past year BLDR closed higher on 41% of sessions, and it is currently 1 session into a rising streak.

On November specifically: over 12 years of records, BLDR finished the month higher 9 of 12 times, with a median return of +6.6% and an average of +7.4%. Its strongest month historically has been November at +7.4% on average, its weakest September at -4.2%.

Overnight risk is measurable too: BLDR has opened more than 2% away from the prior close in 270 of 3,095 sessions (8.7% of the time), with the largest gaps running +11.9% and -38.4%.

Across the last 4 dated reports on file, BLDR moved an average of 2.5% in the session after earnings, closing higher 2 of those 4 times, with a median move of -0.6% and a largest of -4.5%.

All figures computed from 3,097 daily closes between 2013-11-06 and 2026-11-04, split-adjusted, recomputed daily. Percentiles are against BLDR's own 13-year history, not a peer group or index.