BSX·Boston Scientific Corporation

Realized volatility (21d)

42.3% 93rd pct

Below its peak

-57.6%

vs 200-day average

-17.6%

Up days (1y)

46%

Boston Scientific Corporation is currently running 42.3% annualised volatility over the last 21 sessions. Measured against BSX's own 13 years of daily returns rather than a market-wide average, that is the 93rd percentile — an extreme by its own standards, against a typical reading of 23.4%.

BSX is trading -57.6% below its running peak. Across 13 full years on file, its median worst-drawdown-in-a-year was -17.7%, and the deepest was -57.7% in 2026. 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 7th percentile — a narrower gap than it typically runs. Over the past year BSX closed higher on 46% of sessions, and it is currently 2 sessions into a rising streak.

On November specifically: over 13 years of records, BSX finished the month higher 6 of 13 times, with a median return of -2.8% and an average of -0.2%. Its strongest month historically has been January at +5.5% on average, its weakest September at -2.3%.

Overnight risk is measurable too: BSX has opened more than 2% away from the prior close in 123 of 3,268 sessions (3.8% of the time), with the largest gaps running +9.8% and -9.7%.

Across the last 4 dated reports on file, BSX moved an average of 1.3% in the session after earnings, closing higher 3 of those 4 times, with a median move of +1.2% and a largest of +2.1%.

All figures computed from 3,269 daily closes between 2013-11-06 and 2026-11-05, split-adjusted, recomputed daily. Percentiles are against BSX's own 13-year history, not a peer group or index.