COO vs RMD: Correlation
Measured on weekly returns over the past three years, Cooper Companies (The) (COO) and ResMed (RMD) carry a correlation of 0.43, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COO and RMD?
On 3 years of weekly data the COO/RMD correlation comes out at 0.43, moderate. Lately the two have moved closer together, with the 1-year correlation at 0.55 versus 0.43 over 3 years. The 5-year figure is 0.50, and annualized covariance runs at 376.0 %².
Among the 38 assets we track against COO, RMD ranks #22 by 3-year correlation. Over the last 12 months COO came out ahead by 11.2 percentage points (-4.3% against -15.5%). The rolling one-year correlation moved between 0.22 and 0.64 over the past three years, a moderate range.
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.
COO vs RMD: side by side
| COO (Cooper Companies (The)) | RMD (ResMed) | |
|---|---|---|
| 1-year return | -4.3% | -15.5% |
| 5-year return | -36.8% | -14.6% |
| Volatility (ann.) | 27.7% | 31.2% |
| Beta vs S&P 500 | 0.69 | 0.79 |
| Max drawdown (3Y) | -47.0% | -37.3% |
| Market cap | – | $34.0B |
| P/E (trailing) | 61.7 | 22.6 |
| Dividend yield | 0.00% | 1.02% |
| Sector / category | Health Care | Health Care |
Year-by-year returns
| Year | COO | RMD |
|---|---|---|
| 2022 | -21.1% | -19.5% |
| 2023 | +14.5% | -16.5% |
| 2024 | -2.8% | +34.2% |
| 2025 | -10.8% | +6.3% |
| 2026 | -13.4% | -1.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COO and RMD good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.43 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between COO and RMD?
The COO/RMD correlation stands at 0.43 on a 3-year window (1 year: 0.55, 5 years: 0.50), computed from weekly returns as of 2026-08-27.
Is RMD a good diversifier for COO?
Yes, to a useful degree: a correlation of 0.43 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.43 mean?
A reading of 0.43 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/coo-vs-rmd.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/coo-vs-rmd/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: COO correlations · RMD correlations
