OXY·Occidental Petroleum Corporation

Realized volatility (21d)

31.0% 57th pct

Below its peak

-41.7%

vs 200-day average

+10.7%

Up days (1y)

53%

Occidental Petroleum Corporation is currently running 31.0% annualised volatility over the last 21 sessions. Measured against OXY's own 13 years of daily returns rather than a market-wide average, that is the 57th percentile — close to its own typical level, against a typical reading of 28.2%. 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.

OXY is trading -41.7% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -30.2%, and the deepest was -81.1% 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 +10.7% from its 200-day moving average. Against every other day in its history, that gap ranks at the 77th percentile — a somewhat wider gap than its own norm. Over the past year OXY closed higher on 53% of sessions, and it is currently 3 sessions into a falling streak.

On September specifically: over 13 years of records, OXY finished the month higher 4 of 13 times, with a median return of -3.5% and an average of -1.9%. Its strongest month historically has been November at +3.1% on average, its weakest March at -2.4%. 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: OXY has opened more than 2% away from the prior close in 144 of 3,267 sessions (4.4% of the time), with the largest gaps running +6.5% and -10.2%. 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, OXY moved an average of 4.6% in the session after earnings, closing higher 2 of those 3 times, with a median move of +2.4% and a largest of +6.1%.

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