SPDR S&P Biotech ETF (XBI) Seasonality
Recurring seasonal patterns for XBI — the calendar windows where SPDR S&P Biotech ETF 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.
XBI's strongest seasonal patterns
| Seasonal window | Direction | Avg return | Win rate | Hold |
|---|---|---|---|---|
| May 29 – Jun 8 | Bullish | +3.56% | 100% | 10d |
| May 17 – Jun 7 | Bullish | +3.50% | 100% | 21d |
| May 19 – Jun 9 | Bullish | +3.42% | 100% | 21d |
| May 28 – Jun 7 | Bullish | +3.11% | 100% | 10d |
| Mar 2 – Mar 23 | Bearish | -6.71% | 90% | 21d |
| May 9 – Jun 8 | Bullish | +6.02% | 90% | 30d |
| Jun 18 – Jul 9 | Bullish | +5.96% | 90% | 21d |
| May 25 – Jun 24 | Bullish | +5.85% | 90% | 30d |
| May 26 – Jun 25 | Bullish | +5.82% | 90% | 30d |
| Jun 19 – Jul 10 | Bullish | +5.31% | 90% | 21d |
| May 8 – Jun 7 | Bullish | +5.29% | 90% | 30d |
| May 10 – Jun 9 | Bullish | +5.14% | 90% | 30d |
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 XBI seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
What is XBI stock seasonality?
Stock seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing SPDR S&P Biotech ETF's price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where XBI 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.