The takeaway
Northwest Pipe Company shows a pronounced seasonal pattern over 10 years of data — strongest in November (+11.2%) and softest in March (−8.9%).
Right now
In July, the stock has risen 50% of years, averaging +0.6%, roughly 1.6 pts behind the S&P 500.
The full picture
Northwest Pipe Company's most dependable month has been November, higher in 8 of 10 years; March has been its least reliable, up just 10% of the time.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Win rate % | ||||||||||||
| Median return % | ||||||||||||
| 2025 | ||||||||||||
| 2024 | ||||||||||||
| 2023 | ||||||||||||
| 2022 | ||||||||||||
| 2021 | ||||||||||||
| 2020 | ||||||||||||
| 2019 | ||||||||||||
| 2018 | ||||||||||||
| 2017 | ||||||||||||
| 2016 |
Month by month
The stock's clearest edge over the S&P 500 lands in November (+8.9 pts); it has trailed the market most in March (−9.9 pts).
“vs S&P” is Northwest Pipe Company’s average for a month minus the S&P 500’s average for that same month — isolating Northwest Pipe Company’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, November has closed higher 60% of the time versus 80% across the last 10 years — the pattern is weakening.
Figures are the typical (median) November 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. November stands out, higher in 8 of 10 Novembers, but it heads a clutch of months that pull the year reliably upward.
Its average (+11.2%) and median (+10.2%) 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 November ranges by 12.5% 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: November has cleared the S&P 500 by +8.9 points above the index. That consistency sets it apart from the field, where the average stock manages November only about 62% of the time.
A few other months pull their weight: June, August, and September have also closed higher more often than not. The weaker half of the year is plainer: March has been the soft spot — the weakest of 2 months that average a loss (−8.9%), and the edge isn't year-round — the stock has trailed the S&P 500 in March, July, and February. Its roughest month on record was a −32.8% March in 2020 — a reminder of how hard even a seasonal name can fall.
At its steadiest, November strung together 7 straight positive years. The pattern has softened of late, November's last five years slipping below its longer-run record.
The takeaway is less about when to buy than what to expect: November aside, the stock's months offer little reliable tilt.
Short answers on the stock's best month (November), its worst (March), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (November, +11.2%) has run well ahead of its worst (March, −8.9%) — the heatmap above shows how steady that gap has been year to year.
November has been the strongest, averaging +11.2% and closing higher in 8 of 10 years since 2016.
It's the weakest, averaging −8.9% — 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