BSX vs PNR: Correlation
Boston Scientific (BSX) and Pentair (PNR) show a moderate relationship: their 3-year correlation of weekly returns is 0.42.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BSX and PNR?
Over the past 3 years, BSX and PNR moved with a correlation of 0.42, which is moderate. The relationship has been stable: the 1-year correlation (0.36) sits close to the 3-year figure. Over 5 years the correlation is 0.48, and the annualized covariance of weekly returns is 331.0 %².
Within BSX's tracked universe of 33 assets, PNR comes in at #14 by 3-year correlation. The trailing year gives PNR the advantage: -55.9% versus -42.5%, a 13.4-point spread. Across three years, the rolling one-year figure varied moderately, from 0.16 to 0.63.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
BSX vs PNR: side by side
| BSX (Boston Scientific) | PNR (Pentair) | |
|---|---|---|
| 1-year return | -55.9% | -42.5% |
| 5-year return | +4.1% | -14.1% |
| Volatility (ann.) | 27.6% | 28.2% |
| Beta vs S&P 500 | 0.72 | 1.07 |
| Max drawdown (3Y) | -60.6% | -45.0% |
| Market cap | $67.6B | $9.9B |
| P/E (trailing) | 19.5 | 16.2 |
| Dividend yield | 0.00% | 1.65% |
| Sector / category | Health Care | Industrials |
Year-by-year returns
| Year | BSX | PNR |
|---|---|---|
| 2022 | +8.9% | -37.4% |
| 2023 | +24.9% | +64.2% |
| 2024 | +54.5% | +40.0% |
| 2025 | +6.8% | +4.5% |
| 2026 | -51.1% | -39.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BSX and PNR good diversifiers for each other?
A fair diversifier. At 0.42, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between BSX and PNR?
Using weekly returns as of 2026-08-27: 0.42 over 3 years, with 0.36 over the last year and 0.48 over 5 years.
Is PNR a good diversifier for BSX?
A fair diversifier. At 0.42, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.42 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/bsx-vs-pnr.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/bsx-vs-pnr/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BSX correlations · PNR correlations
