ON·ON Semiconductor Corporation

Realized volatility (21d)

51.4% 74th pct

Below its peak

-45.8%

vs 200-day average

-8.5%

Up days (1y)

53%

ON Semiconductor Corporation is currently running 51.4% annualised volatility over the last 21 sessions. Measured against ON's own 13 years of daily returns rather than a market-wide average, that is the 74th percentile — a little above its own norm, against a typical reading of 40.1%. 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.

ON is trading -45.8% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -31.6%, and the deepest was -65.4% 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 -8.5% from its 200-day moving average. Against every other day in its history, that gap ranks at the 19th percentile — a narrower gap than it typically runs. Over the past year ON closed higher on 53% of sessions, and it is currently 1 session into a rising streak.

On September specifically: over 14 years of records, ON finished the month higher 7 of 14 times, with a median return of -0.1% and an average of -0.4%. Its strongest month historically has been July at +6.2% on average, its weakest March at -3.7%. 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: ON has opened more than 2% away from the prior close in 311 of 3,268 sessions (9.5% of the time), with the largest gaps running +13.6% and -8.2%. 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, ON moved an average of 6.8% in the session after earnings, closing higher 2 of those 3 times, with a median move of +5.9% and a largest of +7.5%.

All figures computed from 3,269 daily closes between 2013-09-16 and 2026-09-15, split-adjusted, recomputed daily. Percentiles are against ON's own 13-year history, not a peer group or index.