MKSI·MKS Inc.

Realized volatility (21d)

60.3% 90th pct

Below its peak

-55.2%

vs 200-day average

-28.5%

Up days (1y)

56%

MKS Inc. is currently running 60.3% annualised volatility over the last 21 sessions. Measured against MKSI's own 13 years of daily returns rather than a market-wide average, that is the 90th percentile — elevated for this stock, against a typical reading of 38.3%.

MKSI is trading -55.2% below its running peak. Across 13 full years on file, its median worst-drawdown-in-a-year was -31.9%, and the deepest was -63.9% 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 -28.5% from its 200-day moving average. Against every other day in its history, that gap ranks at the 4th percentile — a narrower gap than it typically runs. Over the past year MKSI closed higher on 56% of sessions, and it is currently 1 session into a rising streak.

On November specifically: over 13 years of records, MKSI finished the month higher 10 of 13 times, with a median return of +1.1% and an average of +6.3%. Its strongest month historically has been January at +7.5% on average, its weakest August at -3.0%.

Overnight risk is measurable too: MKSI has opened more than 2% away from the prior close in 345 of 3,268 sessions (10.6% of the time), with the largest gaps running +7.7% and -13.9%.

Across the last 3 dated reports on file, MKSI moved an average of 2.4% in the session after earnings, closing higher 2 of those 3 times, with a median move of +1.3% and a largest of -3.9%.

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