The takeaway
Power Solutions International, Inc. Common Stock shows a pronounced seasonal pattern over 10 years of data — strongest in May (+22.5%) and softest in February (−5.2%).
Right now
In July, the stock has risen 50% of years, averaging +15.8%, about +13.7 pts better than the S&P 500.
The full picture
Power Solutions International, Inc. Common Stock's most dependable month has been May, higher in 6 of 10 years; February has been its least reliable, up just 20% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in May (+21.8 pts); it has trailed the market most in April (−5.0 pts).
“vs S&P” is Power Solutions International, Inc. Common Stock’s average for a month minus the S&P 500’s average for that same month — isolating Power Solutions International, Inc. Common Stock’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, May has closed higher 40% of the time versus 60% across the last 10 years — the pattern is weakening.
Figures are the typical (median) May 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
There's a real but measured seasonal tilt here, toward May — the firmest corner of the calendar, higher in 6 of 10 Mays.
The strength looks broad-based rather than freakish: its average (+22.5%) and median (+24.0%) sit close together, so no single blow-out year is flattering the figure. That reliability comes with real swings, mind — even May ranges by 37.1% from year to year, so any single year can land far from the average. Better still, that strength is the stock's own and not just a buoyant market — May has outpaced the S&P 500 by +21.8 points on average.
Only March comes anywhere near it for reliability. The weaker half of the year is plainer: February has been the soft spot — the weakest of 4 months that average a loss (−5.2%), and the edge isn't year-round — the stock has trailed the S&P 500 in April, February, and September. Its roughest month on record was a −42.5% March in 2020 — a reminder of how hard even a seasonal name can fall.
The pattern has softened of late, May's last five years slipping below its longer-run record.
Treat it as a tendency rather than a rule — seasonality describes the past, not a promise. With returns that swing hard year to year, the signal is best held loosely.
Short answers on the stock's best month (May), its worst (February), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (May, +22.5%) has run well ahead of its worst (February, −5.2%) — the heatmap above shows how steady that gap has been year to year.
May has been the strongest, averaging +22.5% and closing higher in 6 of 10 years since 2016.
It's the weakest, averaging −5.2% — 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