Biogen (BIIB) Seasonality
Recurring seasonal patterns for BIIB — the calendar windows where Biogen has historically tended to rise or fall, with the win rate (how often it repeated) and average return for each, based on up to 10 years of price history.
BIIB's strongest seasonal patterns
| Seasonal window | Direction | Avg return | Win rate | Hold |
|---|---|---|---|---|
| Feb 21 – Mar 23 | Bearish | -7.80% | 90% | 30d |
| Mar 3 – Mar 24 | Bearish | -7.09% | 90% | 21d |
| Feb 23 – Mar 25 | Bearish | -6.62% | 90% | 30d |
| Feb 25 – Mar 27 | Bearish | -5.98% | 90% | 30d |
| Mar 2 – Mar 12 | Bearish | -4.05% | 90% | 10d |
| Feb 18 – Mar 20 | Bearish | -3.95% | 90% | 30d |
| Jun 8 – Jun 18 | Bearish | -3.77% | 90% | 10d |
| Feb 17 – Mar 19 | Bearish | -3.67% | 90% | 30d |
| Feb 23 – Mar 16 | Bearish | -3.30% | 90% | 21d |
| Feb 25 – Mar 18 | Bearish | -2.90% | 90% | 21d |
| Jul 29 – Aug 8 | Bullish | +2.75% | 90% | 10d |
| Mar 4 – Mar 14 | Bearish | -2.57% | 90% | 10d |
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 BIIB seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
What is BIIB stock seasonality?
Stock seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing Biogen's price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where BIIB 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.