LYB·LyondellBasell Industries N.V.

Realized volatility (21d)

35.3% 75th pct

Below its peak

-49.0%

vs 200-day average

+1.2%

Up days (1y)

47%

LyondellBasell Industries N.V. is currently running 35.3% annualised volatility over the last 21 sessions. Measured against LYB's own 13 years of daily returns rather than a market-wide average, that is the 75th percentile — elevated for this stock, against a typical reading of 27.3%. 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.

LYB is trading -49.0% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -29.8%, and the deepest was -62.5% 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 +1.2% from its 200-day moving average. Against every other day in its history, that gap ranks at the 56th percentile — a somewhat wider gap than its own norm. Over the past year LYB closed higher on 47% of sessions, and it is currently 3 sessions into a falling streak.

On September specifically: over 13 years of records, LYB finished the month higher 6 of 13 times, with a median return of -4.6% and an average of -1.0%. Its strongest month historically has been November at +3.1% on average, its weakest June at -3.2%. 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: LYB has opened more than 2% away from the prior close in 150 of 3,267 sessions (4.6% of the time), with the largest gaps running +10.3% and -9.6%. 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, LYB moved an average of 2.5% in the session after earnings, closing higher 2 of those 3 times, with a median move of +1.7% and a largest of +3.9%.

All figures computed from 3,268 daily closes between 2013-09-20 and 2026-09-18, split-adjusted, recomputed daily. Percentiles are against LYB's own 13-year history, not a peer group or index.