SU·Suncor Energy Inc.

Realized volatility (21d)

31.1% 60th pct

Below its peak

-3.3%

vs 200-day average

+17.4%

Up days (1y)

55%

Suncor Energy Inc. is currently running 31.1% annualised volatility over the last 21 sessions. Measured against SU's own 13 years of daily returns rather than a market-wide average, that is the 60th percentile — close to its own typical level, against a typical reading of 28.6%. 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.

SU is trading -3.3% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -24.6%, and the deepest was -69.0% in 2020. The current pullback is therefore shallower than what this stock gives back in a typical year, which is context worth having before treating it as a dislocation.

Price sits +17.4% from its 200-day moving average. Against every other day in its history, that gap ranks at the 87th percentile — a wider gap than this stock usually carries. Over the past year SU closed higher on 55% of sessions, and it is currently 1 session into a falling streak.

On September specifically: over 13 years of records, SU finished the month higher 7 of 13 times, with a median return of +0.3% and an average of -1.3%. Its strongest month historically has been April at +4.3% on average, its weakest June at -2.0%. 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: SU has opened more than 2% away from the prior close in 233 of 3,267 sessions (7.1% of the time), with the largest gaps running +8.0% and -8.8%. For anyone holding through an event, that rate is a better guide to overnight exposure than the intraday range.

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