Boston Scientific (BSX) Seasonality
Recurring seasonal patterns for BSX — the calendar windows where Boston Scientific 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.
BSX seasonality at a glance
Over the last 10 years, BSX's strongest seasonal window has been Aug 9 – Sep 8: it ended higher in 10 of 10 years (100% win rate) with an average return of +4.66% across a 30-day hold. On the weak side, BSX has historically declined between Sep 8 – Sep 28, falling in 8 of 10 years (average -3.05%).
In total, our analysis finds 712 recurring seasonal windows for Boston Scientific — 539 bullish and 173 bearish. The next high-win-rate window, Aug 4 – Sep 3, opens in 8 days. These figures describe historical behaviour only — not a forecast.
BSX'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 3d ago | Jul 14 – Jul 24 | 10d | +1.91% | 80% | +2.23% |
| Completedended 63d ago | May 15 – May 25 | 10d | +1.45% | 80% | +9.68% |
| Upcomingin 8d | Aug 4 – Sep 3 | 30d | +3.32% | 80% | — |
| Upcomingin 9d | Aug 5 – Sep 4 | 30d | +4.20% | 90% | — |
| Upcomingin 10d | Aug 6 – Sep 5 | 30d | +4.02% | 90% | — |
| Upcomingin 11d | Aug 7 – Sep 6 | 30d | +4.41% | 90% | — |
| Upcomingin 12d | Aug 8 – Aug 28 | 20d | +2.23% | 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 BSX seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
BSX seasonality FAQ
What has historically been the best month to buy BSX stock?
Based on the last 10 years of price data, BSX's strongest seasonal window starts in August: Aug 9 to Sep 8, which ended higher in 10 of 10 years (100% win rate) with an average return of +4.66%. Past seasonal patterns do not guarantee future performance.
What is BSX's strongest seasonal pattern?
BSX's highest-win-rate pattern in our data is the Aug 9 – Sep 8 window (30-day hold): up in 10 of the last 10 years with an average move of +4.66%.
When has BSX historically performed worst?
BSX's weakest recurring window has been Sep 8 to Sep 28, declining in 8 of 10 years with an average return of -3.05%.
How reliable are BSX's seasonal patterns?
Each BSX pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. BSX currently shows 712 recurring windows (539 bullish, 173 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is BSX stock seasonality?
Stock seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing Boston Scientific's price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where BSX 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.