The takeaway
Pinnacle West Capital Corp shows a moderate seasonal pattern over 10 years of data — strongest in March (+4.1%) and softest in August (−2.4%).
Right now
In July, the stock has risen 50% of years, averaging +2.6% — essentially in line with the S&P 500.
The full picture
Pinnacle West Capital Corp's most dependable month has been March, higher in 9 of 10 years; August has been its least reliable, up just 30% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in March (+3.1 pts); it has trailed the market most in August (−2.7 pts).
“vs S&P” is Pinnacle West Capital Corp’s average for a month minus the S&P 500’s average for that same month — isolating Pinnacle West Capital Corp’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, March has closed higher 100% of the time versus 90% across the last 10 years — the pattern is strengthening.
Figures are the typical (median) March return and how often it rose — the last 5 years versus the last 10(the heatmap’s default window). This verdict stays anchored to that 10-year window even if you zoom the chart, so it never disagrees with the badges above.
In plain English
Dependability is the through-line here. March stands out, higher in 9 of 10 Marches, but it heads a clutch of months that pull the year reliably upward.
Its average (+4.1%) and median (+5.6%) land within a hair of each other — the tell of steady, year-after-year gains rather than one outlier doing the work. That reliability comes with real swings, mind — even March ranges by 9.1% from year to year, so any single year can land far from the average. Crucially, the gain is the stock's own rather than a rising tide's: March has cleared the S&P 500 by +3.1 points above the index. That consistency sets it apart from the field, where the average stock manages March only about 56% of the time.
The strength clusters rather than stands alone — March–May forms a firm stretch that carries much of the year. On the other side of the ledger, August has been the soft spot — the weakest of 3 months that average a loss (−2.4%), and the edge isn't year-round — the stock has trailed the S&P 500 in August, September, and December.
March has now closed higher 5 years running. If anything it has sharpened recently — the last five Marches run ahead of the earlier years.
The takeaway is less about when to buy than what to expect: March aside, the stock's months offer little reliable tilt.
Short answers on the stock's best month (March), its worst (August), and whether it really trades seasonally.
Yes, to a moderate degree. Since 2016 its best month (March, +4.1%) has run well ahead of its worst (August, −2.4%) — the heatmap above shows how steady that gap has been year to year.
March has been the strongest, averaging +4.1% and closing higher in 9 of 10 years since 2016.
It's the weakest, averaging −2.4% — historically a soft spot, though it still varies from year to year.
Explore
These names have the strongest July track records on record — a starting point for comparison.
Before you trade