HAL·Halliburton Company

Realized volatility (21d)

32.2% 47th pct

Below its peak

-54.6%

vs 200-day average

-4.4%

Up days (1y)

52%

Halliburton Company is currently running 32.2% annualised volatility over the last 21 sessions. Measured against HAL's own 13 years of daily returns rather than a market-wide average, that is the 47th percentile — close to its own typical level, against a typical reading of 33.0%. 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.

HAL is trading -54.6% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -37.3%, and the deepest was -81.4% 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 -4.4% from its 200-day moving average. Against every other day in its history, that gap ranks at the 49th percentile — close to the gap it normally carries. Over the past year HAL closed higher on 52% of sessions, and it is currently 3 sessions into a falling streak.

On September specifically: over 13 years of records, HAL finished the month higher 7 of 13 times, with a median return of +0.5% and an average of -1.3%. Its strongest month historically has been April at +4.2% on average, its weakest March at -3.5%. 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: HAL has opened more than 2% away from the prior close in 167 of 3,268 sessions (5.1% of the time), with the largest gaps running +11.4% and -12.9%. 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, HAL moved an average of 1.0% in the session after earnings, closing higher 2 of those 3 times, with a median move of +0.2% and a largest of +2.4%.

All figures computed from 3,269 daily closes between 2013-09-19 and 2026-09-18, split-adjusted, recomputed daily. Percentiles are against HAL's own 13-year history, not a peer group or index.