PNW·Pinnacle West Capital Corporation

Realized volatility (21d)

10.6% 6th pct

Below its peak

-13.2%

vs 200-day average

-3.9%

Up days (1y)

50%

Pinnacle West Capital Corporation is currently running 10.6% annualised volatility over the last 21 sessions. Measured against PNW's own 13 years of daily returns rather than a market-wide average, that is the 6th percentile — unusually subdued by its own history, against a typical reading of 17.4%. 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.

PNW is trading -13.2% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -13.1%, and the deepest was -40.2% 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 -3.9% from its 200-day moving average. Against every other day in its history, that gap ranks at the 21st percentile — a narrower gap than it typically runs. Over the past year PNW closed higher on 50% of sessions, and it is currently 5 sessions into a falling streak.

On September specifically: over 14 years of records, PNW finished the month higher 7 of 14 times, with a median return of +0.2% and an average of -1.1%. Its strongest month historically has been March at +3.2% on average, its weakest August at -1.9%. 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: PNW has opened more than 2% away from the prior close in 49 of 3,268 sessions (1.5% of the time), with the largest gaps running +6.4% and -9.0%. 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, PNW moved an average of 0.3% in the session after earnings, closing higher 1 of those 3 times, with a median move of -0.3% and a largest of -0.5%.

All figures computed from 3,269 daily closes between 2013-09-16 and 2026-09-15, split-adjusted, recomputed daily. Percentiles are against PNW's own 13-year history, not a peer group or index.