The takeaway
Plumas Bancorp shows a pronounced seasonal pattern over 10 years of data — strongest in October (+7.6%) and softest in September (−1.7%).
Right now
In July, the stock has risen 50% of years, averaging +1.7% — essentially in line with the S&P 500.
The full picture
Plumas Bancorp's most dependable month has been October, higher in 9 of 10 years; September 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 November (+6.7 pts); it has trailed the market most in March (−3.8 pts).
“vs S&P” is Plumas Bancorp’s average for a month minus the S&P 500’s average for that same month — isolating Plumas Bancorp’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, October has closed higher 80% of the time versus 90% across the last 10 years — the pattern is weakening.
Figures are the typical (median) October 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
Strip the year back and a single month does the heavy lifting: October, up in 9 of 10 Octobers while the other eleven tend to blur together.
The headline flatters a touch — its +7.6% average sits well above the +4.1% a typical year delivers, the work of a few big Octobers. Crucially, the gain is the stock's own rather than a rising tide's: October has cleared the S&P 500 by +6.6 points above the index. That consistency sets it apart from the field, where the average stock manages October only about 53% of the time.
The strength clusters rather than stands alone — October–January forms a firm stretch that carries much of the year. The weaker half of the year is plainer: September has been the soft spot — the weakest of 5 months that average a loss (−1.7%), and the edge isn't year-round — the stock has trailed the S&P 500 in March, May, and August. Its roughest month on record was a −25.5% March in 2020 — a reminder of how hard even a seasonal name can fall.
A long streak recently broke — October had risen 9 years straight before a −4.1% reading in 2025. The pattern has softened of late, October's last five years slipping below its longer-run record.
The takeaway is less about when to buy than what to expect: October aside, the stock's months offer little reliable tilt.
Short answers on the stock's best month (October), its worst (September), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (October, +7.6%) has run well ahead of its worst (September, −1.7%) — the heatmap above shows how steady that gap has been year to year.
October has been the strongest, averaging +7.6% and closing higher in 9 of 10 years since 2016.
It's the weakest, averaging −1.7% — 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