Best Day of the Year to Invest in BSX (Boston Scientific)
Daily prices from · Data through · By Archibald Sheran
Based on 35 years of data (1992–2026), January 2 has historically been the best day to invest in BSX. Buying on that date and holding for ≈ 1 month returned an average of +9.98% with a 78% win rate. The weakest day is September 2 (-8.82%).
Seasonal Return by Day of Year for BSX
Each point is the average return over the following ≈ 1 month (21 trading days) if you had invested on that calendar date. Cyan = best day, red = worst day.
10 Best Days to Invest in BSX
| Date | Avg Return (≈ 1 month) | Win Rate | Samples |
|---|---|---|---|
| January 2Best | +9.98% | 78% | 18 |
| December 19 | +8.22% | 79% | 24 |
| December 26 | +8.03% | 68% | 19 |
| December 20 | +7.35% | 75% | 24 |
| December 16 | +6.74% | 72% | 25 |
| January 3 | +6.64% | 71% | 24 |
| December 18 | +6.56% | 83% | 24 |
| December 8 | +6.43% | 88% | 25 |
| December 17 | +6.42% | 67% | 24 |
| December 15 | +6.34% | 68% | 25 |
Best Day to Invest in BSX, Month by Month
The single strongest calendar date within each month. Prefer the broader view? See the best month to invest in BSX →
| Best Date | Avg Return (≈ 1 month) | Win Rate | Samples |
|---|---|---|---|
| January 2 | +9.98% | 78% | 18 |
| February 17 | +3.75% | 50% | 20 |
| March 30 | +3.89% | 65% | 23 |
| April 18 | +5.02% | 71% | 21 |
| May 16 | +3.50% | 63% | 24 |
| June 11 | +3.33% | 71% | 24 |
| July 10 | +3.21% | 56% | 25 |
| August 9 | +4.10% | 83% | 24 |
| September 5 | +1.49% | 58% | 19 |
| October 25 | +2.52% | 58% | 24 |
| November 30 | +2.97% | 71% | 24 |
| December 19 | +8.22% | 79% | 24 |
10 Weakest Days to Invest in BSX
| Date | Avg Return (≈ 1 month) | Win Rate | Samples |
|---|---|---|---|
| September 2Worst | -8.82% | 19% | 21 |
| September 1 | -7.69% | 24% | 21 |
| September 8 | -7.66% | 15% | 26 |
| September 15 | -6.18% | 19% | 26 |
| September 14 | -5.81% | 25% | 24 |
| August 25 | -5.57% | 35% | 26 |
| September 9 | -5.28% | 31% | 26 |
| September 3 | -4.56% | 33% | 21 |
| August 26 | -4.51% | 31% | 26 |
| September 11 | -4.18% | 42% | 24 |
From a Single Date to a Full Seasonal Window
This page fixes the holding period at ≈ 1 month. Does It Repeat finds the optimal entry and exit dates for each seasonal window inside the app:
- ●Optimised entry/exit dates — not just a fixed one-month hold
- ●Win rate, drawdown & equity curve for every seasonal window
- ●Cycle detection — spectral analysis projects rising and declining phases forward
How to Read This Data
Avg Return is the mean percentage change over the 21 trading days (≈ 1 month) following each calendar date, averaged across the years BSX was traded.
Win Rate shows how often that forward month finished positive. A 75% win rate means BSX rose over the following month in 3 of every 4 years you invested on that date.
Samples is the number of years that contributed to the date. Calendar dates that fall on weekends or holidays in some years naturally have fewer samples; only dates with enough history are ranked.
Seasonal patterns are historical tendencies, not guarantees. A specific calendar date is a rough proxy for a seasonal window — treat it as one input alongside your own research, not a precise timing signal.
Beyond a single date
See every seasonal window for BSX
One date is a starting point. Does It Repeat finds the full entry and exit window around it, how consistently it has held historically, and whether the pattern still holds up.
Seasonality screener
FreeThe next yearly windows with a perfect record
- ICG.LICG PLCLongOct 21 → Nov 25 · won 10 of 10 years · +13.3% avg
- PHParker HannifinLongOct 21 → Nov 22 · won 10 of 10 years · +11.4% avg
- ODFLOld Dominion Freight LineLongOct 22 → Dec 2 · won 10 of 10 years · +9.0% avg
Price cycle screener
FreeCycle models with an entry in the next two weeks
- LITELumentum Holdings Inc.Shortentry Oct 29 · +302.9% net · 100% won
- XMR-USDMoneroLongentry Oct 27 · +278.2% net · 80% won
- AMDAdvanced Micro Devices Inc.Shortentry Oct 27 · +217.1% net · 80% won
Free account includes a screener preview, no credit card. Full access $20/mo at early-adopter pricing, 14-day money-back guarantee, cancel anytime. All statistics are historical; past performance does not guarantee future results.
Frequently Asked Questions
What is the best day of the year to invest in BSX?▾
Based on 35 years of data, January 2 has historically been the best day to invest in BSX. Buying on that date and holding for ≈ 1 month returned an average of +9.98% with a 78% win rate.
Does buying on one specific day really matter?▾
A single calendar date is a proxy for a seasonal window rather than a precise signal. The dates that rank highest tend to cluster around genuinely strong seasonal periods, which is why we also show the best day within each month and link through to the broader best month analysis.
How is this calculated?▾
For each calendar date we measure the return over the following 21 trading days (≈ 1 month) if you had bought on that date, using daily closing prices from 1992 to 2026, then average across all years. The date with the highest average forward return is the historically best day to invest.
Is this trading or investment advice?▾
No. This page is historical statistical analysis for educational and informational purposes only. It is not financial, investment, or trading advice and is not a recommendation to buy, sell, or hold BSX or any other security. Past performance does not guarantee future results — always do your own research and consult a qualified financial advisor before investing.
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- How to Screen Stocks for Seasonal Patterns8 min read