000660.KS·SK hynix Inc.

Realized volatility (21d)

45.1% 62nd pct

Below its peak

-39.1%

vs 200-day average

+23.8%

Up days (1y)

57%

SK hynix Inc. is currently running 45.1% annualised volatility over the last 21 sessions. Measured against 000660.KS's own 5 years of daily returns rather than a market-wide average, that is the 62nd percentile — a little above its own norm, against a typical reading of 40.6%. 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.

000660.KS is trading -39.1% below its running peak. Across 4 full years on file, its median worst-drawdown-in-a-year was -31.8%, and the deepest was -43.6% 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 +23.8% from its 200-day moving average. Against every other day in its history, that gap ranks at the 55th percentile — close to the gap it normally carries. Over the past year 000660.KS closed higher on 57% of sessions, and it is currently 1 session into a falling streak.

On October specifically: over 5 years of records, 000660.KS finished the month higher 4 of 5 times, with a median return of +3.0% and an average of +13.0%. Its strongest month historically has been May at +19.7% on average, its weakest July at -7.5%. 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: 000660.KS has opened more than 2% away from the prior close in 347 of 1,254 sessions (27.7% of the time), with the largest gaps running +28.4% and -10.9%. For anyone holding through an event, that rate is a better guide to overnight exposure than the intraday range.

All figures computed from 1,255 daily closes between 2021-08-17 and 2026-10-06, split-adjusted, recomputed daily. Percentiles are against 000660.KS's own 5-year history, not a peer group or index.