MPWR·Monolithic Power Systems, Inc.

Realized volatility (21d)

49.9% 76th pct

Below its peak

-22.4%

vs 200-day average

+1.1%

Up days (1y)

52%

Monolithic Power Systems, Inc. is currently running 49.9% annualised volatility over the last 21 sessions. Measured against MPWR's own 13 years of daily returns rather than a market-wide average, that is the 76th percentile — elevated for this stock, against a typical reading of 34.7%. 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.

MPWR is trading -22.4% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -28.4%, and the deepest was -43.9% in 2022. The current pullback is therefore shallower than what this stock gives back in a typical year, which is context worth having before treating it as a dislocation.

Price sits +1.1% 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 MPWR closed higher on 52% of sessions, and it is currently 1 session into a falling streak.

On October specifically: over 14 years of records, MPWR finished the month higher 7 of 14 times, with a median return of -0.3% and an average of +2.2%. Its strongest month historically has been July at +6.7% on average, its weakest September at +0.3%. 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: MPWR has opened more than 2% away from the prior close in 306 of 3,268 sessions (9.4% of the time), with the largest gaps running +12.3% and -11.2%. 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, MPWR moved an average of 3.4% in the session after earnings, closing higher 1 of those 3 times, with a median move of -1.0% and a largest of +6.9%.

All figures computed from 3,269 daily closes between 2013-10-15 and 2026-10-14, split-adjusted, recomputed daily. Percentiles are against MPWR's own 13-year history, not a peer group or index.