BioMarin Pharmaceutical (BMRN) Seasonality
Recurring seasonal patterns for BMRN — the calendar windows where BioMarin Pharmaceutical has historically tended to rise or fall, with the win rate (how often it repeated) and average return for each, based on the last 10 years of price history.
BMRN seasonality at a glance
Over the last 10 years, BMRN's strongest seasonal window has been Oct 31 – Nov 30: it ended higher in 10 of 10 years (100% win rate) with an average return of +7.30% across a 30-day hold. On the weak side, BMRN has historically declined between Sep 2 – Oct 2, falling in 9 of 10 years (average -7.00%).
In total, our analysis finds 786 recurring seasonal windows for BioMarin Pharmaceutical — 358 bullish and 428 bearish. The next high-win-rate window, Aug 8 – Aug 18, opens in 12 days. These figures describe historical behaviour only — not a forecast.
BMRN's upcoming & recent seasonal patterns
Holding period:10-day20-day30-dayOrdered by season — windows opening soon first, plus a couple of recently completed high-performers. Holding-period colors help you compare durations at a glance.
| Status | Seasonal window | Hold | Avg return | Win rate | This year |
|---|---|---|---|---|---|
| Completedended 11d ago | Jul 6 – Jul 16 | 10d | +2.13% | 90% | +2.06% |
| Completedended 11d ago | Jun 16 – Jul 16 | 30d | +5.61% | 80% | +8.85% |
| Upcomingin 12d | Aug 8 – Aug 18 | 10d | -1.96% | 80% | — |
| Upcomingin 12d | Aug 8 – Sep 7 | 30d | -5.33% | 80% | — |
| Upcomingin 13d | Aug 9 – Aug 19 | 10d | -5.05% | 80% | — |
| Upcomingin 13d | Aug 9 – Sep 8 | 30d | -5.32% | 80% | — |
| Upcomingin 31d | Aug 27 – Sep 26 | 30d | -4.26% | 80% | — |
Win rate = how often the pattern repeated in the same direction. Average return = the mean move across all analysed years. Past performance does not guarantee future results.
Explore BMRN seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
BMRN seasonality FAQ
What has historically been the best month to buy BMRN stock?
Based on the last 10 years of price data, BMRN's strongest seasonal window starts in October: Oct 31 to Nov 30, which ended higher in 10 of 10 years (100% win rate) with an average return of +7.30%. Past seasonal patterns do not guarantee future performance.
What is BMRN's strongest seasonal pattern?
BMRN's highest-win-rate pattern in our data is the Oct 31 – Nov 30 window (30-day hold): up in 10 of the last 10 years with an average move of +7.30%.
When has BMRN historically performed worst?
BMRN's weakest recurring window has been Sep 2 to Oct 2, declining in 9 of 10 years with an average return of -7.00%.
How reliable are BMRN's seasonal patterns?
Each BMRN pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. BMRN currently shows 786 recurring windows (358 bullish, 428 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is BMRN stock seasonality?
Stock seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing BioMarin Pharmaceutical's price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where BMRN has repeatedly risen (bullish) or fallen (bearish). Each pattern is scored by its win rate and average return so you can judge how reliable and how strong it has been.
Seasonality is one input among many — it works best alongside your own research and risk management. Learn more in our guide to seasonal analysis and the tutorials.