EFX vs RMD: Correlation
Equifax (EFX) and ResMed (RMD) show a moderate relationship: their 3-year correlation of weekly returns is 0.46.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are EFX and RMD?
On 3 years of weekly data the EFX/RMD correlation comes out at 0.46, moderate. The link has loosened recently: the 1-year correlation (0.35) runs below the 3-year figure (0.46). The 5-year figure is 0.46, and annualized covariance runs at 474.4 %².
By 3-year correlation, RMD places #32 of the 53 assets tracked against EFX. The trailing year gives RMD the advantage: -21.8% versus -15.5%, a 6.3-point spread. Across three years, the rolling one-year figure varied moderately, from 0.25 to 0.58.
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.
EFX vs RMD: side by side
| EFX (Equifax) | RMD (ResMed) | |
|---|---|---|
| 1-year return | -21.8% | -15.5% |
| 5-year return | -26.0% | -14.6% |
| Volatility (ann.) | 33.3% | 31.2% |
| Beta vs S&P 500 | 1.25 | 0.79 |
| Max drawdown (3Y) | -49.7% | -37.3% |
| Market cap | $22.4B | $34.0B |
| P/E (trailing) | 33.5 | 22.6 |
| Dividend yield | 1.11% | 1.02% |
| Sector / category | Industrials | Health Care |
Year-by-year returns
| Year | EFX | RMD |
|---|---|---|
| 2022 | -33.1% | -19.5% |
| 2023 | +28.2% | -16.5% |
| 2024 | +3.7% | +34.2% |
| 2025 | -14.2% | +6.3% |
| 2026 | -11.7% | -1.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are EFX and RMD good diversifiers for each other?
A fair diversifier. At 0.46, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between EFX and RMD?
The EFX/RMD correlation stands at 0.46 on a 3-year window (1 year: 0.35, 5 years: 0.46), computed from weekly returns as of 2026-08-27.
Is RMD a good diversifier for EFX?
A fair diversifier. At 0.46, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.46 mean?
On the −1 to +1 scale, 0.46 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/efx-vs-rmd.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/efx-vs-rmd/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: EFX correlations · RMD correlations
