The takeaway
Senseonics Holdings, Inc. Common Stock shows a pronounced seasonal pattern over 10 years of data — strongest in January (+25.4%) and softest in March (−20.5%).
Right now
In July, the stock has risen 60% of years, averaging +2.7%, about +0.5 pts better than the S&P 500.
The full picture
Senseonics Holdings, Inc. Common Stock's most dependable month has been January, higher in 6 of 10 years; March has been its least reliable, up just 10% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in January (+25.6 pts); it has trailed the market most in March (−21.6 pts).
“vs S&P” is Senseonics Holdings, Inc. Common Stock’s average for a month minus the S&P 500’s average for that same month — isolating Senseonics Holdings, Inc. Common Stock’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, January has closed higher 80% of the time versus 60% across the last 10 years — the pattern is strengthening.
Figures are the typical (median) January 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
January looks the standout, up in 6 of 10 Januaries — yet the appeal is lumpy, leaning on the occasional blow-out year rather than dependable strength.
The headline flatters a touch — its +25.4% average sits well above the +0.9% a typical year delivers, the work of a few big Januaries. That reliability comes with real swings, mind — even January ranges by 53.2% 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: January has cleared the S&P 500 by +25.6 points above the index.
A few other months pull their weight: June, July, and August have also closed higher more often than not. On the other side of the ledger, March has been the soft spot — the weakest of 6 months that average a loss (−20.5%), and the edge isn't year-round — the stock has trailed the S&P 500 in March, October, and May. Its roughest month on record was a −60.4% March in 2020 — a reminder of how hard even a seasonal name can fall.
If anything it has sharpened recently — the last five Januaries run ahead of the earlier years.
Hold it loosely, then: the January tendency is genuine but lumpy, more about the occasional outsized year than a gain to bank on. With returns that swing hard year to year, the signal is best held loosely.
Short answers on the stock's best month (January), its worst (March), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (January, +25.4%) has run well ahead of its worst (March, −20.5%) — the heatmap above shows how steady that gap has been year to year.
January has been the strongest, averaging +25.4% and closing higher in 6 of 10 years since 2016.
It's the weakest, averaging −20.5% — 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