The takeaway
Precision BioSciences Inc shows a pronounced seasonal pattern over 7 years of data — strongest in May (0.0%) and softest in December (−18.7%).
Right now
In July, the stock has fallen 29% of years, averaging −4.7%, roughly 6.8 pts behind the S&P 500.
The full picture
Precision BioSciences Inc's most dependable month has been May, higher in 4 of 7 years; December has been its least reliable, up just 0% of the time.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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| 2019 | — | — |
Month by month
The stock's clearest edge over the S&P 500 lands in November (+27.4 pts); it has trailed the market most in December (−19.7 pts).
“vs S&P” is Precision BioSciences Inc’s average for a month minus the S&P 500’s average for that same month — isolating Precision BioSciences Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, May has closed higher 40% of the time versus 57% across the last 7 years — the pattern is weakening.
Figures are the typical (median) May return and how often it rose — the last 5 years versus the last 7(the heatmap’s default window). This verdict stays anchored to that 7-year window even if you zoom the chart, so it never disagrees with the badges above.
In plain English
The year leans May's way without overwhelming the rest of it: the stock has closed higher in 4 of 7 Mays, its most dependable month if not a dominant one.
Its average (0.0%) and median (+3.8%) 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 May ranges by 15.5% from year to year, so any single year can land far from the average.
On the other side of the ledger, December has been the soft spot — the weakest of 8 months that average a loss (−18.7%), and the edge isn't year-round — the stock has trailed the S&P 500 in December, March, and April. Its roughest month on record was a −44.5% December in 2024 — 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 a short 7-year record and returns that swing hard year to year, the signal is best held loosely.
Short answers on the stock's best month (May), its worst (December), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2019 its best month (May, 0.0%) has run well ahead of its worst (December, −18.7%) — the heatmap above shows how steady that gap has been year to year.
May has been the strongest, averaging 0.0% and closing higher in 4 of 7 years since 2019.
It's the weakest, averaging −18.7% — 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.
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