Boston Scientific Corporation vs Stryker Corporation
WatchlistBSX / SYKPrices through Oct 22, 2026
Why these are rivals: #1 and #3 by market value ($114B vs $65B) in Nasdaq's "Medical/Dental Instruments" industry; SEC SIC 3841 / 3841 (same major group); #1 and #3 by market value ($114B vs $65B) with SEC SIC 3841 (Surgical & Medical Instruments & Apparatus).
Rivals, but right now the price gap does not have a measured habit of closing, so there is no paper idea, whatever the gap.
- Co-movement: daily return correlation, 252 sessions: 0.41 (needs >= 0.60)
- Mean reversion: ADF t-statistic of the spread: -1.06 (needs <= -2.873 (5% critical value))
- Speed: half-life of the spread, sessions: 108.42 (needs <= 63)
Business leadership
SYK is the larger business
Annual revenue reported to the SEC. Scale, not market share.
| Year | BSX | SYK | Larger |
|---|---|---|---|
| 2025 | $20.1B | $25.1B | SYK |
| 2024 | $16.7B | $22.6B | SYK |
| 2023 | $14.2B | $20.5B | SYK |
| 2022 | $12.7B | $18.4B | SYK |
| 2021 | $11.9B | $17.1B | SYK |
| 2020 | $9.9B | $14.4B | SYK |
SYK led in every year with figures for both. Market value: BSX $65.3B, SYK $114.3B.
Stock leadership
SYK is ahead now
Measured against the pair's own last 252 trading days.
SYK leads BSX by 0.98 standard deviations: +27.2% over its usual price ratio. 3 lead switches in the last year.
| Price change | 3 mo | 6 mo | 12 mo |
|---|---|---|---|
| BSX | +4.0% | -30.0% | -53.9% |
| SYK | -7.0% | -6.8% | -19.1% |
Relationship
Not a measured twin today
Only these tests can make a pair tradable on paper.
- Pass
- Aligned sessions: 2520 (needs >= 254)
- Fail
- Co-movement: daily return correlation, 252 sessions: 0.41 (needs >= 0.60)
- Fail
- Mean reversion: ADF t-statistic of the spread: -1.06 (needs <= -2.873 (5% critical value))
- Fail
- Speed: half-life of the spread, sessions: 108.42 (needs <= 63)
- Data
- Both stocks current
The twins over two years
Prices side by side, and the gap between them
BSX Boston Scientific Corporation SYK Stryker CorporationPrice index, 100 = 2024-10-18. Tint = which stock is ahead of the pair's usual 1-year relationship (z beyond +/-0.5).
Spread z-score: BSX relative to SYK, against the 252 sessions before each day. Above 0: BSX ahead; below 0: SYK ahead. Lines at +/-2 (idea) and +/-4 (stop).
Data table (504 sessions)
| Date | BSX index | SYK index | z | Ahead |
|---|---|---|---|---|
| 2026-10-22 | 52.24 | 83.09 | -0.98 | SYK ahead |
| 2026-10-21 | 50.54 | 80.53 | -0.99 | SYK ahead |
| 2026-10-20 | 51.75 | 82.37 | -0.99 | SYK ahead |
| 2026-10-19 | 51.15 | 80.62 | -0.96 | SYK ahead |
| 2026-10-16 | 50.40 | 79.73 | -0.98 | SYK ahead |
| 2026-10-15 | 50.12 | 79.35 | -1.00 | SYK ahead |
| 2026-10-14 | 48.82 | 76.20 | -0.95 | SYK ahead |
| 2026-10-13 | 49.18 | 76.46 | -0.94 | SYK ahead |
| 2026-10-12 | 49.78 | 76.47 | -0.90 | SYK ahead |
| 2026-10-09 | 48.52 | 75.04 | -0.93 | SYK ahead |
| 2026-10-08 | 47.73 | 74.95 | -1.00 | SYK ahead |
| 2026-10-07 | 47.21 | 74.52 | -1.03 | SYK ahead |
| 2026-10-06 | 47.91 | 75.28 | -1.02 | SYK ahead |
| 2026-10-05 | 48.14 | 77.18 | -1.11 | SYK ahead |
| 2026-10-02 | 48.37 | 74.53 | -0.96 | SYK ahead |
| 2026-10-01 | 49.09 | 73.86 | -0.87 | SYK ahead |
| 2026-09-30 | 49.56 | 74.52 | -0.87 | SYK ahead |
| 2026-09-29 | 49.82 | 75.43 | -0.91 | SYK ahead |
| 2026-09-28 | 50.09 | 74.50 | -0.84 | SYK ahead |
| 2026-09-25 | 49.87 | 73.70 | -0.82 | SYK ahead |
| 2026-09-24 | 50.73 | 72.99 | -0.72 | SYK ahead |
| 2026-09-23 | 50.66 | 73.98 | -0.79 | SYK ahead |
| 2026-09-22 | 51.00 | 74.44 | -0.79 | SYK ahead |
| 2026-09-21 | 49.64 | 74.19 | -0.90 | SYK ahead |
| 2026-09-18 | 49.21 | 74.45 | -0.95 | SYK ahead |
| 2026-09-17 | 49.45 | 75.80 | -1.01 | SYK ahead |
| 2026-09-16 | 49.86 | 77.05 | -1.05 | SYK ahead |
| 2026-09-15 | 49.81 | 76.17 | -1.02 | SYK ahead |
| 2026-09-14 | 51.15 | 76.27 | -0.93 | SYK ahead |
| 2026-09-11 | 48.80 | 74.56 | -1.03 | SYK ahead |
| 2026-09-10 | 48.94 | 73.06 | -0.95 | SYK ahead |
| 2026-09-09 | 51.05 | 74.52 | -0.86 | SYK ahead |
| 2026-09-08 | 51.07 | 74.80 | -0.88 | SYK ahead |
| 2026-09-04 | 54.28 | 82.02 | -1.02 | SYK ahead |
| 2026-09-03 | 53.31 | 83.34 | -1.16 | SYK ahead |
| 2026-09-02 | 54.92 | 84.48 | -1.10 | SYK ahead |
| 2026-09-01 | 54.59 | 85.89 | -1.20 | SYK ahead |
| 2026-08-31 | 54.84 | 87.62 | -1.27 | SYK ahead |
| 2026-08-28 | 53.18 | 89.48 | -1.49 | SYK ahead |
| 2026-08-27 | 52.99 | 87.16 | -1.41 | SYK ahead |
| 2026-08-26 | 54.70 | 89.21 | -1.39 | SYK ahead |
| 2026-08-25 | 56.61 | 89.46 | -1.28 | SYK ahead |
| 2026-08-24 | 55.65 | 88.70 | -1.32 | SYK ahead |
| 2026-08-21 | 57.19 | 89.15 | -1.24 | SYK ahead |
| 2026-08-20 | 56.06 | 88.67 | -1.31 | SYK ahead |
| 2026-08-19 | 59.06 | 92.00 | -1.26 | SYK ahead |
| 2026-08-18 | 57.31 | 89.67 | -1.29 | SYK ahead |
| 2026-08-17 | 58.40 | 89.75 | -1.23 | SYK ahead |
| 2026-08-14 | 58.85 | 91.79 | -1.30 | SYK ahead |
| 2026-08-13 | 58.69 | 92.30 | -1.34 | SYK ahead |
| 2026-08-12 | 58.39 | 93.95 | -1.45 | SYK ahead |
| 2026-08-11 | 58.12 | 94.21 | -1.49 | SYK ahead |
| 2026-08-10 | 57.30 | 93.57 | -1.53 | SYK ahead |
| 2026-08-07 | 55.99 | 91.74 | -1.56 | SYK ahead |
| 2026-08-06 | 55.98 | 91.31 | -1.56 | SYK ahead |
| 2026-08-05 | 54.21 | 91.20 | -1.70 | SYK ahead |
| 2026-08-04 | 55.74 | 90.91 | -1.59 | SYK ahead |
| 2026-08-03 | 54.99 | 92.33 | -1.72 | SYK ahead |
| 2026-07-31 | 53.06 | 88.13 | -1.70 | SYK ahead |
| 2026-07-30 | 52.23 | 94.18 | -2.06 | SYK ahead |
| 2026-07-29 | 52.28 | 95.32 | -2.13 | SYK ahead |
| 2026-07-28 | 52.30 | 93.79 | -2.09 | SYK ahead |
| 2026-07-27 | 51.67 | 91.12 | -2.05 | SYK ahead |
| 2026-07-24 | 50.24 | 89.36 | -2.11 | SYK ahead |
| 2026-07-23 | 49.48 | 86.31 | -2.05 | SYK ahead |
| 2026-07-22 | 48.79 | 83.68 | -2.00 | SYK ahead |
| 2026-07-21 | 49.04 | 85.12 | -2.08 | SYK ahead |
| 2026-07-20 | 49.70 | 86.36 | -2.11 | SYK ahead |
| 2026-07-17 | 49.99 | 86.55 | -2.13 | SYK ahead |
| 2026-07-16 | 50.66 | 89.62 | -2.25 | SYK ahead |
| 2026-07-15 | 48.87 | 85.63 | -2.24 | SYK ahead |
| 2026-07-14 | 48.40 | 84.17 | -2.24 | SYK ahead |
| 2026-07-13 | 50.70 | 89.69 | -2.35 | SYK ahead |
| 2026-07-10 | 50.83 | 89.24 | -2.35 | SYK ahead |
| 2026-07-09 | 51.08 | 88.51 | -2.33 | SYK ahead |
| 2026-07-08 | 50.88 | 88.44 | -2.38 | SYK ahead |
| 2026-07-07 | 51.44 | 89.23 | -2.40 | SYK ahead |
| 2026-07-06 | 50.64 | 87.87 | -2.44 | SYK ahead |
| 2026-07-02 | 51.25 | 88.36 | -2.45 | SYK ahead |
| 2026-07-01 | 48.89 | 84.80 | -2.52 | SYK ahead |
| 2026-06-30 | 48.46 | 85.19 | -2.63 | SYK ahead |
| 2026-06-29 | 49.37 | 89.44 | -2.84 | SYK ahead |
| 2026-06-26 | 50.22 | 90.03 | -2.84 | SYK ahead |
| 2026-06-25 | 50.19 | 85.54 | -2.63 | SYK ahead |
| 2026-06-24 | 50.48 | 84.88 | -2.60 | SYK ahead |
| 2026-06-23 | 51.78 | 83.88 | -2.44 | SYK ahead |
| 2026-06-22 | 50.33 | 82.45 | -2.54 | SYK ahead |
| 2026-06-18 | 51.43 | 83.29 | -2.52 | SYK ahead |
| 2026-06-17 | 51.04 | 81.49 | -2.49 | SYK ahead |
| 2026-06-16 | 53.28 | 84.04 | -2.46 | SYK ahead |
| 2026-06-15 | 53.09 | 83.33 | -2.47 | SYK ahead |
| 2026-06-12 | 53.26 | 84.48 | -2.57 | SYK ahead |
| 2026-06-11 | 53.56 | 82.70 | -2.46 | SYK ahead |
| 2026-06-10 | 54.89 | 83.57 | -2.42 | SYK ahead |
| 2026-06-09 | 55.59 | 84.97 | -2.48 | SYK ahead |
| 2026-06-08 | 55.30 | 81.59 | -2.31 | SYK ahead |
| 2026-06-05 | 55.13 | 82.71 | -2.44 | SYK ahead |
| 2026-06-04 | 55.47 | 81.51 | -2.35 | SYK ahead |
| 2026-06-03 | 54.15 | 79.82 | -2.41 | SYK ahead |
| 2026-06-02 | 54.14 | 79.36 | -2.41 | SYK ahead |
| 2026-06-01 | 54.48 | 81.03 | -2.54 | SYK ahead |
| 2026-05-29 | 54.85 | 82.55 | -2.66 | SYK ahead |
| 2026-05-28 | 55.76 | 83.24 | -2.66 | SYK ahead |
| 2026-05-27 | 57.30 | 82.78 | -2.49 | SYK ahead |
| 2026-05-26 | 65.45 | 84.70 | -1.79 | SYK ahead |
| 2026-05-22 | 65.61 | 85.64 | -1.87 | SYK ahead |
| 2026-05-21 | 64.89 | 84.83 | -1.90 | SYK ahead |
| 2026-05-20 | 64.35 | 86.99 | -2.15 | SYK ahead |
| 2026-05-19 | 64.51 | 85.98 | -2.09 | SYK ahead |
| 2026-05-18 | 63.49 | 84.75 | -2.12 | SYK ahead |
| 2026-05-15 | 59.82 | 83.01 | -2.42 | SYK ahead |
| 2026-05-14 | 60.80 | 82.67 | -2.32 | SYK ahead |
| 2026-05-13 | 60.25 | 81.74 | -2.34 | SYK ahead |
| 2026-05-12 | 61.43 | 79.68 | -2.05 | SYK ahead |
| 2026-05-11 | 60.60 | 76.46 | -1.88 | SYK ahead |
| 2026-05-08 | 61.24 | 77.25 | -1.90 | SYK ahead |
| 2026-05-07 | 64.23 | 79.62 | -1.79 | SYK ahead |
| 2026-05-06 | 63.59 | 79.10 | -1.84 | SYK ahead |
| 2026-05-05 | 63.56 | 79.89 | -1.94 | SYK ahead |
| 2026-05-04 | 64.55 | 78.71 | -1.74 | SYK ahead |
| 2026-05-01 | 64.15 | 79.75 | -1.90 | SYK ahead |
| 2026-04-30 | 65.41 | 85.27 | -2.28 | SYK ahead |
| 2026-04-29 | 64.89 | 85.27 | -2.37 | SYK ahead |
| 2026-04-28 | 66.37 | 86.98 | -2.39 | SYK ahead |
| 2026-04-27 | 68.07 | 89.03 | -2.41 | SYK ahead |
| 2026-04-24 | 70.48 | 88.62 | -2.14 | SYK ahead |
| 2026-04-23 | 74.59 | 89.20 | -1.77 | SYK ahead |
| 2026-04-22 | 73.66 | 89.12 | -1.88 | SYK ahead |
| 2026-04-21 | 67.58 | 88.56 | -2.54 | SYK ahead |
| 2026-04-20 | 69.25 | 91.55 | -2.66 | SYK ahead |
| 2026-04-17 | 72.93 | 92.90 | -2.40 | SYK ahead |
| 2026-04-16 | 72.01 | 91.56 | -2.43 | SYK ahead |
| 2026-04-15 | 73.36 | 92.34 | -2.38 | SYK ahead |
| 2026-04-14 | 72.47 | 93.59 | -2.64 | SYK ahead |
| 2026-04-13 | 71.74 | 93.96 | -2.81 | SYK ahead |
| 2026-04-10 | 70.16 | 91.77 | -2.85 | SYK ahead |
| 2026-04-09 | 69.58 | 91.77 | -2.99 | SYK ahead |
| 2026-04-08 | 71.03 | 92.00 | -2.89 | SYK ahead |
| 2026-04-07 | 70.24 | 89.86 | -2.84 | SYK ahead |
| 2026-04-06 | 71.07 | 89.92 | -2.79 | SYK ahead |
| 2026-04-02 | 71.33 | 89.71 | -2.79 | SYK ahead |
| 2026-04-01 | 70.40 | 89.13 | -2.91 | SYK ahead |
| 2026-03-31 | 71.25 | 88.91 | -2.83 | SYK ahead |
| 2026-03-30 | 71.45 | 88.24 | -2.78 | SYK ahead |
| 2026-03-27 | 78.54 | 88.60 | -1.93 | SYK ahead |
| 2026-03-26 | 79.68 | 90.02 | -1.97 | SYK ahead |
| 2026-03-25 | 79.23 | 88.66 | -1.90 | SYK ahead |
| 2026-03-24 | 77.38 | 88.89 | -2.19 | SYK ahead |
| 2026-03-23 | 78.96 | 90.00 | -2.14 | SYK ahead |
| 2026-03-20 | 78.89 | 90.83 | -2.27 | SYK ahead |
| 2026-03-19 | 79.36 | 91.94 | -2.37 | SYK ahead |
| 2026-03-18 | 80.94 | 93.57 | -2.39 | SYK ahead |
| 2026-03-17 | 80.84 | 94.47 | -2.54 | SYK ahead |
| 2026-03-16 | 79.24 | 94.59 | -2.82 | SYK ahead |
| 2026-03-13 | 78.49 | 91.13 | -2.56 | SYK ahead |
| 2026-03-12 | 77.84 | 91.25 | -2.72 | SYK ahead |
| 2026-03-11 | 79.06 | 93.57 | -2.88 | SYK ahead |
| 2026-03-10 | 79.44 | 97.05 | -3.31 | SYK ahead |
| 2026-03-09 | 81.64 | 99.02 | -3.31 | SYK ahead |
| 2026-03-06 | 81.02 | 98.65 | -3.45 | SYK ahead |
| 2026-03-05 | 82.88 | 100.25 | -3.47 | SYK ahead |
| 2026-03-04 | 81.99 | 103.34 | -4.12 | SYK ahead |
| 2026-03-03 | 83.85 | 104.07 | -4.07 | SYK ahead |
| 2026-03-02 | 86.54 | 104.72 | -3.86 | SYK ahead |
| 2026-02-27 | 87.26 | 104.84 | -3.89 | SYK ahead |
| 2026-02-26 | 86.01 | 104.46 | -4.19 | SYK ahead |
| 2026-02-25 | 83.43 | 103.92 | -4.77 | SYK ahead |
| 2026-02-24 | 85.33 | 103.18 | -4.52 | SYK ahead |
| 2026-02-23 | 84.44 | 104.10 | -5.08 | SYK ahead |
| 2026-02-20 | 84.68 | 102.89 | -5.11 | SYK ahead |
| 2026-02-19 | 85.98 | 100.84 | -4.73 | SYK ahead |
| 2026-02-18 | 86.61 | 102.10 | -5.07 | SYK ahead |
| 2026-02-17 | 86.62 | 99.90 | -4.90 | SYK ahead |
| 2026-02-13 | 84.85 | 99.05 | -5.45 | SYK ahead |
| 2026-02-12 | 84.16 | 99.00 | -6.02 | SYK ahead |
| 2026-02-11 | 83.42 | 98.41 | -6.62 | SYK ahead |
| 2026-02-10 | 84.31 | 97.70 | -6.77 | SYK ahead |
| 2026-02-09 | 84.16 | 96.35 | -7.09 | SYK ahead |
| 2026-02-06 | 86.60 | 96.95 | -7.10 | SYK ahead |
| 2026-02-05 | 88.16 | 98.07 | -7.70 | SYK ahead |
| 2026-02-04 | 85.73 | 97.59 | -10.09 | SYK ahead |
| 2026-02-03 | 104.03 | 97.64 | -2.24 | SYK ahead |
| 2026-02-02 | 104.31 | 99.62 | -3.01 | SYK ahead |
| 2026-01-30 | 106.20 | 100.00 | -2.45 | SYK ahead |
| 2026-01-29 | 104.84 | 95.87 | -1.21 | SYK ahead |
| 2026-01-28 | 106.49 | 96.83 | -0.96 | SYK ahead |
| 2026-01-27 | 106.29 | 95.94 | -0.65 | SYK ahead |
| 2026-01-26 | 106.22 | 96.60 | -0.96 | SYK ahead |
| 2026-01-23 | 105.04 | 96.07 | -1.19 | SYK ahead |
| 2026-01-22 | 103.66 | 97.05 | -2.16 | SYK ahead |
| 2026-01-21 | 104.13 | 98.21 | -2.48 | SYK ahead |
| 2026-01-20 | 103.55 | 97.31 | -2.34 | SYK ahead |
| 2026-01-16 | 100.00 | 98.44 | -4.47 | SYK ahead |
| 2026-01-15 | 102.23 | 98.09 | -3.44 | SYK ahead |
| 2026-01-14 | 106.44 | 97.25 | -1.26 | SYK ahead |
| 2026-01-13 | 106.89 | 96.28 | -0.62 | SYK ahead |
| 2026-01-12 | 108.69 | 97.78 | -0.57 | SYK ahead |
| 2026-01-09 | 110.87 | 99.45 | -0.43 | near the usual relationship |
| 2026-01-08 | 111.71 | 99.36 | -0.05 | near the usual relationship |
| 2026-01-07 | 112.01 | 99.51 | +0.02 | near the usual relationship |
| 2026-01-06 | 111.04 | 99.14 | -0.18 | near the usual relationship |
| 2026-01-05 | 108.41 | 94.38 | +0.88 | BSX ahead |
| 2026-01-02 | 107.54 | 94.21 | +0.62 | BSX ahead |
| 2025-12-31 | 108.27 | 95.10 | +0.52 | BSX ahead |
| 2025-12-30 | 109.02 | 95.82 | +0.50 | BSX ahead |
| 2025-12-29 | 108.73 | 95.38 | +0.58 | BSX ahead |
| 2025-12-26 | 109.07 | 95.85 | +0.52 | BSX ahead |
| 2025-12-24 | 109.15 | 95.99 | +0.49 | near the usual relationship |
| 2025-12-23 | 109.11 | 96.01 | +0.48 | near the usual relationship |
| 2025-12-22 | 109.49 | 96.47 | +0.44 | near the usual relationship |
| 2025-12-19 | 108.56 | 96.11 | +0.28 | near the usual relationship |
| 2025-12-18 | 109.13 | 95.55 | +0.66 | BSX ahead |
| 2025-12-17 | 107.28 | 95.41 | +0.14 | near the usual relationship |
| 2025-12-16 | 105.54 | 95.16 | -0.29 | near the usual relationship |
| 2025-12-15 | 104.68 | 96.14 | -0.86 | SYK ahead |
| 2025-12-12 | 105.12 | 95.81 | -0.59 | SYK ahead |
| 2025-12-11 | 104.18 | 95.51 | -0.73 | SYK ahead |
| 2025-12-10 | 105.26 | 95.74 | -0.47 | near the usual relationship |
| 2025-12-09 | 105.06 | 94.50 | -0.13 | near the usual relationship |
| 2025-12-08 | 106.55 | 95.68 | -0.07 | near the usual relationship |
| 2025-12-05 | 110.73 | 98.50 | +0.20 | near the usual relationship |
| 2025-12-04 | 110.96 | 98.59 | +0.24 | near the usual relationship |
| 2025-12-03 | 111.92 | 99.02 | +0.36 | near the usual relationship |
| 2025-12-02 | 112.43 | 99.22 | +0.43 | near the usual relationship |
| 2025-12-01 | 114.69 | 100.75 | +0.55 | BSX ahead |
| 2025-11-28 | 115.34 | 100.44 | +0.77 | BSX ahead |
| 2025-11-26 | 114.64 | 100.74 | +0.55 | BSX ahead |
| 2025-11-25 | 115.09 | 101.49 | +0.48 | near the usual relationship |
| 2025-11-24 | 111.32 | 100.18 | +0.02 | near the usual relationship |
| 2025-11-21 | 110.00 | 99.65 | -0.12 | near the usual relationship |
| 2025-11-20 | 109.69 | 97.54 | +0.30 | near the usual relationship |
| 2025-11-19 | 110.15 | 98.56 | +0.18 | near the usual relationship |
| 2025-11-18 | 112.66 | 97.28 | +0.94 | BSX ahead |
| 2025-11-17 | 115.54 | 97.45 | +1.44 | BSX ahead |
| 2025-11-14 | 116.60 | 98.01 | +1.50 | BSX ahead |
| 2025-11-13 | 119.20 | 101.04 | +1.34 | BSX ahead |
| 2025-11-12 | 118.24 | 99.40 | +1.51 | BSX ahead |
| 2025-11-11 | 116.38 | 98.41 | +1.40 | BSX ahead |
| 2025-11-10 | 114.58 | 96.07 | +1.58 | BSX ahead |
| 2025-11-07 | 113.57 | 96.34 | +1.34 | BSX ahead |
| 2025-11-06 | 112.47 | 95.74 | +1.28 | BSX ahead |
| 2025-11-05 | 112.30 | 96.78 | +1.04 | BSX ahead |
| 2025-11-04 | 112.23 | 98.12 | +0.76 | BSX ahead |
| 2025-11-03 | 111.95 | 96.92 | +0.96 | BSX ahead |
| 2025-10-31 | 114.36 | 96.40 | +1.48 | BSX ahead |
| 2025-10-30 | 114.19 | 99.84 | +0.79 | BSX ahead |
| 2025-10-29 | 113.89 | 100.01 | +0.71 | BSX ahead |
| 2025-10-28 | 114.65 | 101.72 | +0.52 | BSX ahead |
| 2025-10-27 | 116.31 | 103.83 | +0.41 | near the usual relationship |
| 2025-10-24 | 114.81 | 103.31 | +0.27 | near the usual relationship |
| 2025-10-23 | 116.26 | 103.65 | +0.45 | near the usual relationship |
| 2025-10-22 | 117.92 | 105.08 | +0.46 | near the usual relationship |
| 2025-10-21 | 113.43 | 102.76 | +0.17 | near the usual relationship |
| 2025-10-20 | 114.15 | 103.16 | +0.22 | near the usual relationship |
| 2025-10-17 | 112.68 | 101.32 | +0.32 | near the usual relationship |
| 2025-10-16 | 111.03 | 99.92 | +0.30 | near the usual relationship |
| 2025-10-15 | 110.95 | 100.05 | +0.27 | near the usual relationship |
| 2025-10-14 | 109.28 | 100.12 | -0.01 | near the usual relationship |
| 2025-10-13 | 107.81 | 98.74 | +0.00 | near the usual relationship |
| 2025-10-10 | 108.33 | 98.66 | +0.11 | near the usual relationship |
| 2025-10-09 | 110.46 | 100.17 | +0.19 | near the usual relationship |
| 2025-10-08 | 109.90 | 101.55 | -0.14 | near the usual relationship |
| 2025-10-07 | 108.89 | 99.91 | -0.01 | near the usual relationship |
| 2025-10-06 | 109.80 | 99.11 | +0.28 | near the usual relationship |
| 2025-10-03 | 110.50 | 100.25 | +0.20 | near the usual relationship |
| 2025-10-02 | 109.25 | 99.14 | +0.20 | near the usual relationship |
| 2025-10-01 | 108.83 | 98.54 | +0.25 | near the usual relationship |
| 2025-09-30 | 110.86 | 100.03 | +0.32 | near the usual relationship |
| 2025-09-29 | 110.19 | 100.09 | +0.21 | near the usual relationship |
| 2025-09-26 | 111.48 | 99.85 | +0.45 | near the usual relationship |
| 2025-09-25 | 111.43 | 99.73 | +0.47 | near the usual relationship |
| 2025-09-24 | 111.34 | 100.45 | +0.35 | near the usual relationship |
| 2025-09-23 | 110.92 | 101.07 | +0.19 | near the usual relationship |
| 2025-09-22 | 110.17 | 102.34 | -0.12 | near the usual relationship |
| 2025-09-19 | 111.08 | 101.97 | +0.08 | near the usual relationship |
| 2025-09-18 | 111.54 | 102.24 | +0.11 | near the usual relationship |
| 2025-09-17 | 111.84 | 101.98 | +0.21 | near the usual relationship |
| 2025-09-16 | 112.39 | 101.91 | +0.30 | near the usual relationship |
| 2025-09-15 | 113.40 | 102.04 | +0.43 | near the usual relationship |
| 2025-09-12 | 116.62 | 103.73 | +0.62 | BSX ahead |
| 2025-09-11 | 118.47 | 105.20 | +0.65 | BSX ahead |
| 2025-09-10 | 119.48 | 103.63 | +1.02 | BSX ahead |
| 2025-09-09 | 122.73 | 106.28 | +1.05 | BSX ahead |
| 2025-09-08 | 122.79 | 106.37 | +1.05 | BSX ahead |
| 2025-09-05 | 121.74 | 106.16 | +0.96 | BSX ahead |
| 2025-09-04 | 121.82 | 106.71 | +0.89 | BSX ahead |
| 2025-09-03 | 122.10 | 105.14 | +1.16 | BSX ahead |
| 2025-09-02 | 121.11 | 105.51 | +0.99 | BSX ahead |
| 2025-08-29 | 119.79 | 105.91 | +0.77 | BSX ahead |
| 2025-08-28 | 120.07 | 105.44 | +0.88 | BSX ahead |
| 2025-08-27 | 120.21 | 106.38 | +0.77 | BSX ahead |
| 2025-08-26 | 120.80 | 106.70 | +0.81 | BSX ahead |
| 2025-08-25 | 119.35 | 105.77 | +0.77 | BSX ahead |
| 2025-08-22 | 120.55 | 106.67 | +0.79 | BSX ahead |
| 2025-08-21 | 119.46 | 104.13 | +1.02 | BSX ahead |
| 2025-08-20 | 120.42 | 106.04 | +0.88 | BSX ahead |
| 2025-08-19 | 117.80 | 105.51 | +0.64 | BSX ahead |
| 2025-08-18 | 117.01 | 103.26 | +0.86 | BSX ahead |
| 2025-08-15 | 117.15 | 103.34 | +0.87 | BSX ahead |
| 2025-08-14 | 118.26 | 102.42 | +1.14 | BSX ahead |
| 2025-08-13 | 116.38 | 102.54 | +0.91 | BSX ahead |
| 2025-08-12 | 116.54 | 101.91 | +1.02 | BSX ahead |
| 2025-08-11 | 116.67 | 101.92 | +1.04 | BSX ahead |
| 2025-08-08 | 117.11 | 102.17 | +1.07 | BSX ahead |
| 2025-08-07 | 116.91 | 101.84 | +1.10 | BSX ahead |
| 2025-08-06 | 116.90 | 101.46 | +1.16 | BSX ahead |
| 2025-08-05 | 119.03 | 103.06 | +1.20 | BSX ahead |
| 2025-08-04 | 121.26 | 103.23 | +1.45 | BSX ahead |
| 2025-08-01 | 119.69 | 102.23 | +1.42 | BSX ahead |
| 2025-07-31 | 119.13 | 106.27 | +0.81 | BSX ahead |
| 2025-07-30 | 121.22 | 108.35 | +0.79 | BSX ahead |
| 2025-07-29 | 120.89 | 108.39 | +0.75 | BSX ahead |
| 2025-07-28 | 120.18 | 108.42 | +0.67 | BSX ahead |
| 2025-07-25 | 120.52 | 109.19 | +0.62 | BSX ahead |
| 2025-07-24 | 120.60 | 107.33 | +0.87 | BSX ahead |
| 2025-07-23 | 122.36 | 108.49 | +0.93 | BSX ahead |
| 2025-07-22 | 117.13 | 106.92 | +0.54 | BSX ahead |
| 2025-07-21 | 117.84 | 104.81 | +0.90 | BSX ahead |
| 2025-07-18 | 117.68 | 105.37 | +0.82 | BSX ahead |
| 2025-07-17 | 118.83 | 105.23 | +0.98 | BSX ahead |
| 2025-07-16 | 117.17 | 105.77 | +0.72 | BSX ahead |
| 2025-07-15 | 117.50 | 105.69 | +0.77 | BSX ahead |
| 2025-07-14 | 118.46 | 105.93 | +0.86 | BSX ahead |
| 2025-07-11 | 117.18 | 105.38 | +0.79 | BSX ahead |
| 2025-07-10 | 117.93 | 106.82 | +0.70 | BSX ahead |
| 2025-07-09 | 116.91 | 106.09 | +0.68 | BSX ahead |
| 2025-07-08 | 116.28 | 105.40 | +0.70 | BSX ahead |
| 2025-07-07 | 117.89 | 106.21 | +0.79 | BSX ahead |
| 2025-07-03 | 118.45 | 106.96 | +0.77 | BSX ahead |
| 2025-07-02 | 117.67 | 106.02 | +0.80 | BSX ahead |
| 2025-07-01 | 118.97 | 107.35 | +0.79 | BSX ahead |
| 2025-06-30 | 121.96 | 107.05 | +1.17 | BSX ahead |
| 2025-06-27 | 120.96 | 106.49 | +1.14 | BSX ahead |
| 2025-06-26 | 118.75 | 105.64 | +1.01 | BSX ahead |
| 2025-06-25 | 118.42 | 106.13 | +0.91 | BSX ahead |
| 2025-06-24 | 118.22 | 104.57 | +1.10 | BSX ahead |
| 2025-06-23 | 116.23 | 102.60 | +1.13 | BSX ahead |
| 2025-06-20 | 115.02 | 101.62 | +1.13 | BSX ahead |
| 2025-06-18 | 115.10 | 101.00 | +1.23 | BSX ahead |
| 2025-06-17 | 115.51 | 101.03 | +1.28 | BSX ahead |
| 2025-06-16 | 115.24 | 102.05 | +1.13 | BSX ahead |
| 2025-06-13 | 113.25 | 102.09 | +0.90 | BSX ahead |
| 2025-06-12 | 111.91 | 102.96 | +0.63 | BSX ahead |
| 2025-06-11 | 112.86 | 103.12 | +0.73 | BSX ahead |
| 2025-06-10 | 112.80 | 104.19 | +0.59 | BSX ahead |
| 2025-06-09 | 113.59 | 103.44 | +0.79 | BSX ahead |
| 2025-06-06 | 115.92 | 103.88 | +1.01 | BSX ahead |
| 2025-06-05 | 116.76 | 103.66 | +1.13 | BSX ahead |
| 2025-06-04 | 116.31 | 103.51 | +1.11 | BSX ahead |
| 2025-06-03 | 117.07 | 103.10 | +1.26 | BSX ahead |
| 2025-06-02 | 118.28 | 103.06 | +1.41 | BSX ahead |
| 2025-05-30 | 119.52 | 103.54 | +1.50 | BSX ahead |
| 2025-05-29 | 118.66 | 103.46 | +1.42 | BSX ahead |
| 2025-05-28 | 118.67 | 102.93 | +1.51 | BSX ahead |
| 2025-05-27 | 120.55 | 103.85 | +1.61 | BSX ahead |
| 2025-05-23 | 118.66 | 101.91 | +1.67 | BSX ahead |
| 2025-05-22 | 118.66 | 102.36 | +1.62 | BSX ahead |
| 2025-05-21 | 118.81 | 102.76 | +1.60 | BSX ahead |
| 2025-05-20 | 120.97 | 105.41 | +1.52 | BSX ahead |
| 2025-05-19 | 121.11 | 106.80 | +1.37 | BSX ahead |
| 2025-05-16 | 120.40 | 106.67 | +1.32 | BSX ahead |
| 2025-05-15 | 119.06 | 106.13 | +1.25 | BSX ahead |
| 2025-05-14 | 116.90 | 104.54 | +1.22 | BSX ahead |
| 2025-05-13 | 116.90 | 104.86 | +1.19 | BSX ahead |
| 2025-05-12 | 116.80 | 105.01 | +1.17 | BSX ahead |
| 2025-05-09 | 116.79 | 103.07 | +1.42 | BSX ahead |
| 2025-05-08 | 117.28 | 103.49 | +1.44 | BSX ahead |
| 2025-05-07 | 119.00 | 103.92 | +1.59 | BSX ahead |
| 2025-05-06 | 118.22 | 102.15 | +1.75 | BSX ahead |
| 2025-05-05 | 118.36 | 103.19 | +1.64 | BSX ahead |
| 2025-05-02 | 119.14 | 102.34 | +1.86 | BSX ahead |
| 2025-05-01 | 117.17 | 101.20 | +1.80 | BSX ahead |
| 2025-04-30 | 116.80 | 101.18 | +1.78 | BSX ahead |
| 2025-04-29 | 116.66 | 100.37 | +1.89 | BSX ahead |
| 2025-04-28 | 116.02 | 99.17 | +2.00 | BSX ahead |
| 2025-04-25 | 115.70 | 98.78 | +2.03 | BSX ahead |
| 2025-04-24 | 114.84 | 97.70 | +2.10 | BSX ahead |
| 2025-04-23 | 112.32 | 96.63 | +1.96 | BSX ahead |
| 2025-04-22 | 107.93 | 94.20 | +1.78 | BSX ahead |
| 2025-04-21 | 106.26 | 91.89 | +1.91 | BSX ahead |
| 2025-04-17 | 108.00 | 93.76 | +1.87 | BSX ahead |
| 2025-04-16 | 108.15 | 93.81 | +1.89 | BSX ahead |
| 2025-04-15 | 106.99 | 93.84 | +1.75 | BSX ahead |
| 2025-04-14 | 107.04 | 95.63 | +1.50 | BSX ahead |
| 2025-04-11 | 106.36 | 94.78 | +1.54 | BSX ahead |
| 2025-04-10 | 105.19 | 94.27 | +1.47 | BSX ahead |
| 2025-04-09 | 109.88 | 98.22 | +1.51 | BSX ahead |
| 2025-04-08 | 102.92 | 91.29 | +1.61 | BSX ahead |
| 2025-04-07 | 103.94 | 93.45 | +1.45 | BSX ahead |
| 2025-04-04 | 101.85 | 93.57 | +1.17 | BSX ahead |
| 2025-04-03 | 111.84 | 99.62 | +1.57 | BSX ahead |
| 2025-04-02 | 113.60 | 102.14 | +1.45 | BSX ahead |
| 2025-04-01 | 114.95 | 101.01 | +1.74 | BSX ahead |
| 2025-03-31 | 114.55 | 100.73 | +1.74 | BSX ahead |
| 2025-03-28 | 112.82 | 98.63 | +1.82 | BSX ahead |
| 2025-03-27 | 114.45 | 99.45 | +1.90 | BSX ahead |
| 2025-03-26 | 116.20 | 99.52 | +2.09 | BSX ahead |
| 2025-03-25 | 117.04 | 100.90 | +2.02 | BSX ahead |
| 2025-03-24 | 116.58 | 101.27 | +1.94 | BSX ahead |
| 2025-03-21 | 114.33 | 100.42 | +1.81 | BSX ahead |
| 2025-03-20 | 115.26 | 101.26 | +1.82 | BSX ahead |
| 2025-03-19 | 114.37 | 102.30 | +1.61 | BSX ahead |
| 2025-03-18 | 112.66 | 101.72 | +1.50 | BSX ahead |
| 2025-03-17 | 112.30 | 101.06 | +1.54 | BSX ahead |
| 2025-03-14 | 110.32 | 99.99 | +1.46 | BSX ahead |
| 2025-03-13 | 108.29 | 98.40 | +1.44 | BSX ahead |
| 2025-03-12 | 109.48 | 98.45 | +1.56 | BSX ahead |
| 2025-03-11 | 108.46 | 98.84 | +1.42 | BSX ahead |
| 2025-03-10 | 106.88 | 100.15 | +1.11 | BSX ahead |
| 2025-03-07 | 112.56 | 102.64 | +1.42 | BSX ahead |
| 2025-03-06 | 114.45 | 103.45 | +1.53 | BSX ahead |
| 2025-03-05 | 118.89 | 107.07 | +1.58 | BSX ahead |
| 2025-03-04 | 117.65 | 105.51 | +1.63 | BSX ahead |
| 2025-03-03 | 119.08 | 106.85 | +1.64 | BSX ahead |
| 2025-02-28 | 117.85 | 104.50 | +1.78 | BSX ahead |
| 2025-02-27 | 114.45 | 105.23 | +1.39 | BSX ahead |
| 2025-02-26 | 115.32 | 106.00 | +1.40 | BSX ahead |
| 2025-02-25 | 114.36 | 105.61 | +1.36 | BSX ahead |
| 2025-02-24 | 118.53 | 104.97 | +1.82 | BSX ahead |
| 2025-02-21 | 118.64 | 103.58 | +1.99 | BSX ahead |
| 2025-02-20 | 119.63 | 104.56 | +1.99 | BSX ahead |
| 2025-02-19 | 119.98 | 105.13 | +1.98 | BSX ahead |
| 2025-02-18 | 119.62 | 104.34 | +2.05 | BSX ahead |
| 2025-02-14 | 120.48 | 104.23 | +2.16 | BSX ahead |
| 2025-02-13 | 120.52 | 105.09 | +2.09 | BSX ahead |
| 2025-02-12 | 120.10 | 104.35 | +2.15 | BSX ahead |
| 2025-02-11 | 120.34 | 105.66 | +2.06 | BSX ahead |
| 2025-02-10 | 120.56 | 106.23 | +2.04 | BSX ahead |
| 2025-02-07 | 119.51 | 105.91 | +2.00 | BSX ahead |
| 2025-02-06 | 119.25 | 107.17 | +1.86 | BSX ahead |
| 2025-02-05 | 119.19 | 107.99 | +1.78 | BSX ahead |
| 2025-02-04 | 117.57 | 106.18 | +1.83 | BSX ahead |
| 2025-02-03 | 117.03 | 105.84 | +1.83 | BSX ahead |
| 2025-01-31 | 116.23 | 105.88 | +1.77 | BSX ahead |
| 2025-01-30 | 117.00 | 105.65 | +1.88 | BSX ahead |
| 2025-01-29 | 116.62 | 105.82 | +1.85 | BSX ahead |
| 2025-01-28 | 116.18 | 106.92 | +1.71 | BSX ahead |
| 2025-01-27 | 116.12 | 108.21 | +1.58 | BSX ahead |
| 2025-01-24 | 115.75 | 106.70 | +1.72 | BSX ahead |
| 2025-01-23 | 115.41 | 106.48 | +1.72 | BSX ahead |
| 2025-01-22 | 113.90 | 105.66 | +1.68 | BSX ahead |
| 2025-01-21 | 114.58 | 107.11 | +1.60 | BSX ahead |
| 2025-01-17 | 112.02 | 103.75 | +1.72 | BSX ahead |
| 2025-01-16 | 111.47 | 103.31 | +1.73 | BSX ahead |
| 2025-01-15 | 110.01 | 99.74 | +2.00 | BSX ahead |
| 2025-01-14 | 108.61 | 98.17 | +2.05 | BSX ahead |
| 2025-01-13 | 107.43 | 97.68 | +2.01 | BSX ahead |
| 2025-01-10 | 107.73 | 98.94 | +1.91 | BSX ahead |
| 2025-01-08 | 108.95 | 98.52 | +2.11 | BSX ahead |
| 2025-01-07 | 104.45 | 96.11 | +1.94 | BSX ahead |
| 2025-01-06 | 103.66 | 97.78 | +1.67 | BSX ahead |
| 2025-01-03 | 102.97 | 97.82 | +1.60 | BSX ahead |
| 2025-01-02 | 101.49 | 97.07 | +1.54 | BSX ahead |
| 2024-12-31 | 101.42 | 97.43 | +1.50 | BSX ahead |
| 2024-12-30 | 101.83 | 98.02 | +1.49 | BSX ahead |
| 2024-12-27 | 102.94 | 99.34 | +1.47 | BSX ahead |
| 2024-12-26 | 103.84 | 99.96 | +1.51 | BSX ahead |
| 2024-12-24 | 103.41 | 100.33 | +1.43 | BSX ahead |
| 2024-12-23 | 102.03 | 99.17 | +1.42 | BSX ahead |
| 2024-12-20 | 101.00 | 98.66 | +1.37 | BSX ahead |
| 2024-12-19 | 100.67 | 96.64 | +1.59 | BSX ahead |
| 2024-12-18 | 99.95 | 97.19 | +1.45 | BSX ahead |
| 2024-12-17 | 102.68 | 100.34 | +1.40 | BSX ahead |
| 2024-12-16 | 102.71 | 100.85 | +1.36 | BSX ahead |
| 2024-12-13 | 102.32 | 101.36 | +1.27 | BSX ahead |
| 2024-12-12 | 102.67 | 101.49 | +1.30 | BSX ahead |
| 2024-12-11 | 102.83 | 101.79 | +1.30 | BSX ahead |
| 2024-12-10 | 102.42 | 103.55 | +1.06 | BSX ahead |
| 2024-12-09 | 100.74 | 103.13 | +0.93 | BSX ahead |
| 2024-12-06 | 102.27 | 104.18 | +0.99 | BSX ahead |
| 2024-12-05 | 102.79 | 103.49 | +1.13 | BSX ahead |
| 2024-12-04 | 103.15 | 105.47 | +0.97 | BSX ahead |
| 2024-12-03 | 102.73 | 105.79 | +0.89 | BSX ahead |
| 2024-12-02 | 102.68 | 105.43 | +0.93 | BSX ahead |
| 2024-11-29 | 102.94 | 106.11 | +0.90 | BSX ahead |
| 2024-11-27 | 103.04 | 105.03 | +1.03 | BSX ahead |
| 2024-11-26 | 102.43 | 105.45 | +0.93 | BSX ahead |
| 2024-11-25 | 101.34 | 104.15 | +0.95 | BSX ahead |
| 2024-11-22 | 102.19 | 104.14 | +1.06 | BSX ahead |
| 2024-11-21 | 103.89 | 105.57 | +1.10 | BSX ahead |
| 2024-11-20 | 102.38 | 104.36 | +1.07 | BSX ahead |
| 2024-11-19 | 102.57 | 105.17 | +1.01 | BSX ahead |
| 2024-11-18 | 102.70 | 105.37 | +1.01 | BSX ahead |
| 2024-11-15 | 98.77 | 105.55 | +0.57 | BSX ahead |
| 2024-11-14 | 99.45 | 103.71 | +0.84 | BSX ahead |
| 2024-11-13 | 100.79 | 105.08 | +0.85 | BSX ahead |
| 2024-11-12 | 100.74 | 104.75 | +0.89 | BSX ahead |
| 2024-11-11 | 100.47 | 102.52 | +1.11 | BSX ahead |
| 2024-11-08 | 100.20 | 101.73 | +1.17 | BSX ahead |
| 2024-11-07 | 98.65 | 100.07 | +1.19 | BSX ahead |
| 2024-11-06 | 98.15 | 99.85 | +1.17 | BSX ahead |
| 2024-11-05 | 97.13 | 100.08 | +1.03 | BSX ahead |
| 2024-11-04 | 96.20 | 99.28 | +1.02 | BSX ahead |
| 2024-11-01 | 94.95 | 99.35 | +0.88 | BSX ahead |
| 2024-10-31 | 95.40 | 96.41 | +1.27 | BSX ahead |
| 2024-10-30 | 95.37 | 98.34 | +1.06 | BSX ahead |
| 2024-10-29 | 96.01 | 97.15 | +1.28 | BSX ahead |
| 2024-10-28 | 96.24 | 96.33 | +1.41 | BSX ahead |
| 2024-10-25 | 96.21 | 95.47 | +1.52 | BSX ahead |
| 2024-10-24 | 96.63 | 97.39 | +1.36 | BSX ahead |
| 2024-10-23 | 99.30 | 98.29 | +1.57 | BSX ahead |
| 2024-10-22 | 99.93 | 99.04 | +1.57 | BSX ahead |
| 2024-10-21 | 99.98 | 99.37 | +1.55 | BSX ahead |
| 2024-10-18 | 100.00 | 100.00 | +1.50 | BSX ahead |
One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Feb 25, 2025 (BSX -3.5%, SYK +0.6%); Jan 15, 2026 (BSX -4.0%, SYK +0.9%); Feb 4, 2026 (BSX -17.6%, SYK -0.0%); Mar 30, 2026 (BSX -9.0%, SYK -0.4%); Apr 22, 2026 (BSX +9.0%, SYK +0.6%); May 27, 2026 (BSX -12.5%, SYK -2.3%). Upcoming earnings: BSX Oct 28, 2026 (pre-market); SYK Oct 29, 2026 (after-hours).
Paired trades
The shared paper book and the replay, kept apart
Forward paper record
No paper position on this pair yet.
Historical simulation (a diagnostic, same rules)
2 simulated trades to Oct 20, 2026: -4.95% per trade on average after costs, 1 won.
| Legs | Entered | Exited | Why | Days | Before costs | Costs + borrow | After costs |
|---|---|---|---|---|---|---|---|
| Long BSX · Short SYK | Feb 2, 2026 | Feb 5, 2026 | divergence stop | 3 | -$1,548.85 | -$23.19 | -$1,572.05 (-15.72%) |
| Long SYK · Short BSX | Jan 27, 2022 | Feb 3, 2022 | converged | 7 | $627.30 | -$44.54 | $582.76 (+5.83%) |
Per $10,000 a leg. A replay on today's companies cannot prove an edge.
The companies
BSX and SYK at a glance
BSX Boston Scientific Corporation
- Listing
- NYSE · SEC CIK 885725
- Industry
- Medical/Dental Instruments · SIC 3841 Surgical & Medical Instruments & Apparatus
- Market value
- $65.3B
- Price history
- 2,521 daily closes, Oct 12, 2016 to Oct 22, 2026
SYK Stryker Corporation
- Listing
- NYSE · SEC CIK 310764
- Industry
- Medical/Dental Instruments · SIC 3841 Surgical & Medical Instruments & Apparatus
- Market value
- $114.3B
- Price history
- 2,520 daily closes, Oct 12, 2016 to Oct 22, 2026
Daily prices: Nasdaq.com. Filings and industry codes: SEC EDGAR. Earnings dates: Nasdaq earnings calendar.
Related
All pairs →Other rivals of BSX and SYK
Follow the research behind the paper book
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Explore the private betaPaper only: hypothetical paired positions with modelled costs. No broker, no orders, no real money. A historical simulation is a diagnostic, not proof of an edge. Not investment advice.
