BSX vs MCO: Correlation
Measured on weekly returns over the past three years, Boston Scientific (BSX) and Moody's Corporation (MCO) carry a correlation of 0.42, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BSX and MCO?
Across a 3-year window, the weekly returns of BSX and MCO correlate at 0.42, moderate. Little has changed lately, as the 1-year reading of 0.35 lands near the 3-year figure. Stretching to 5 years gives 0.47, with an annualized covariance of 301.3 %².
Among the 33 assets we track against BSX, MCO ranks #12 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months MCO outperformed by 56.6 percentage points (-55.9% for BSX against +0.7% for MCO). Across three years, the rolling one-year figure varied moderately, from 0.32 to 0.69.
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 MCO: side by side
| BSX (Boston Scientific) | MCO (Moody's Corporation) | |
|---|---|---|
| 1-year return | -55.9% | +0.7% |
| 5-year return | +4.1% | +39.4% |
| Volatility (ann.) | 27.6% | 25.8% |
| Beta vs S&P 500 | 0.72 | 1.08 |
| Max drawdown (3Y) | -60.6% | -24.7% |
| Market cap | $67.6B | $88.2B |
| P/E (trailing) | 19.5 | 32.7 |
| Dividend yield | 0.00% | 0.77% |
| Sector / category | Health Care | Financials |
Year-by-year returns
| Year | BSX | MCO |
|---|---|---|
| 2022 | +8.9% | -28.0% |
| 2023 | +24.9% | +41.5% |
| 2024 | +54.5% | +22.2% |
| 2025 | +6.8% | +8.7% |
| 2026 | -51.1% | +0.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BSX and MCO good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.42 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between BSX and MCO?
As of 2026-08-27, the correlation of weekly returns between BSX and MCO is 0.42 over 3 years, 0.35 over 1 year and 0.47 over 5 years.
Is MCO a good diversifier for BSX?
Yes, to a useful degree: a correlation of 0.42 leaves real independence between the two, which historically damped combined volatility.
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-mco.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/bsx-vs-mco/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: BSX correlations · MCO correlations
