CRL·Charles River Laboratories International, Inc.

Realized volatility (21d)

41.3% 80th pct

Below its peak

-32.2%

vs 200-day average

+48.0%

Up days (1y)

54%

Charles River Laboratories International, Inc. is currently running 41.3% annualised volatility over the last 21 sessions. Measured against CRL's own 13 years of daily returns rather than a market-wide average, that is the 80th percentile — elevated for this stock, 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.

CRL is trading -32.2% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -25.2%, and the deepest was -49.6% in 2022. 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 +48.0% from its 200-day moving average. Against every other day in its history, that gap ranks at the 100th percentile — a wider gap than this stock usually carries. Over the past year CRL closed higher on 54% of sessions, and it is currently 2 sessions into a rising streak.

On October specifically: over 13 years of records, CRL finished the month higher 8 of 13 times, with a median return of +3.4% and an average of +0.1%. Its strongest month historically has been July at +6.8% on average, its weakest April at -4.0%. 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: CRL has opened more than 2% away from the prior close in 167 of 3,267 sessions (5.1% of the time), with the largest gaps running +7.1% and -13.1%. 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, CRL moved an average of 2.2% in the session after earnings, closing higher 2 of those 3 times, with a median move of +0.4% and a largest of +3.9%.

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