The takeaway
Powell Industries Inc shows a slight seasonal lean over 10 years of data — strongest in April (+4.1%) and softest in July (+3.0%).
Right now
In July, the stock has risen 40% of years, averaging +3.0%, about +0.9 pts better than the S&P 500.
The full picture
Powell Industries Inc's most dependable month has been April, higher in 8 of 10 years; July has been its least reliable, up just 40% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in May (+11.9 pts); it has trailed the market most in March (−5.3 pts).
“vs S&P” is Powell Industries Inc’s average for a month minus the S&P 500’s average for that same month — isolating Powell Industries Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, April has closed higher 60% of the time versus 80% across the last 10 years — the pattern is weakening.
Figures are the typical (median) April 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
This is a stock you can almost set a calendar by, and April is the anchor — it has closed higher in 8 of 10 Aprils, the steadiest beat on its year.
The strength looks broad-based rather than freakish: its average (+4.1%) and median (+4.3%) sit close together, so no single blow-out year is flattering the figure. No month is steadier: April's returns vary by just 5.4% year to year, and even its worst April in 10 years lost only 5.9% — the gentlest downside anywhere on its calendar. Better still, that strength is the stock's own and not just a buoyant market — April has outpaced the S&P 500 by +2.4 points on average. Few peers keep such company in April — the typical stock clears it just 55% of the time.
April anchors a run, too: the April-through-June window has been the stock's reliable season. The weaker half of the year is plainer: July is the year's low point, though even there the stock has stayed positive on average (+3.0%), a sign every month leans up, and the edge isn't year-round — the stock has trailed the S&P 500 in March and February. Its roughest month on record was a −27.9% February in 2025 — a reminder of how hard even a seasonal name can fall.
The pattern has softened of late, April's last five years slipping below its longer-run record.
For a stock this dependable in April, the sharper question is the rest of the year — outside its strong stretch, the calendar gives far less to lean on. With returns that swing hard year to year, the signal is best held loosely.
Short answers on the stock's best month (April), its worst (July), and whether it really trades seasonally.
Only mildly. The stock's months are fairly even — April is the firmest (+4.1%) and July the softest (+3.0%), a narrow spread that points to weak seasonality rather than a strong calendar effect.
April has been the strongest, averaging +4.1% and closing higher in 8 of 10 years since 2016.
It's the weakest month, but it has still averaged a small gain (+3.0%) — quiet rather than genuinely bad.
Explore
These names have the strongest July track records on record — a starting point for comparison.
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