CAH vs RBBN: Correlation
Cardinal Health (CAH) and Ribbon Communications Inc. (RBBN) show a negative relationship: their 3-year correlation of weekly returns is -0.22.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CAH and RBBN?
Across a 3-year window, the weekly returns of CAH and RBBN correlate at -0.22, negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.32 lands near the 3-year figure. Stretching to 5 years gives -0.08, with an annualized covariance of -267.3 %².
By 3-year correlation, RBBN places #25 of the 32 assets tracked against CAH. Correlation aside, the last 12 months split them widely, with CAH ahead by 109.1 points (+59.2% versus -49.9%). One caveat on sizing: RBBN is 2.1 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
CAH vs RBBN: side by side
| CAH (Cardinal Health) | RBBN (Ribbon Communications Inc.) | |
|---|---|---|
| 1-year return | +59.2% | -49.9% |
| 5-year return | +409.0% | -69.7% |
| Volatility (ann.) | 24.2% | 50.8% |
| Beta vs S&P 500 | 0.31 | 1.67 |
| Max drawdown (3Y) | -20.4% | -62.1% |
| Market cap | $54.7B | $0.4B |
| P/E (trailing) | 33.0 | 25.0 |
| Dividend yield | 0.86% | 0.00% |
| Sector / category | Health Care | US Listed |
Year-by-year returns
| Year | CAH | RBBN |
|---|---|---|
| 2022 | +54.1% | -53.9% |
| 2023 | +34.1% | +3.9% |
| 2024 | +19.0% | +43.4% |
| 2025 | +76.3% | -30.8% |
| 2026 | +15.2% | -30.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CAH and RBBN good diversifiers for each other?
Yes. With a correlation of -0.22, CAH and RBBN have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between CAH and RBBN?
As of 2026-08-27, the correlation of weekly returns between CAH and RBBN is -0.22 over 3 years, -0.32 over 1 year and -0.08 over 5 years.
Is RBBN a good diversifier for CAH?
Yes. With a correlation of -0.22, CAH and RBBN have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.22 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/cah-vs-rbbn.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/cah-vs-rbbn/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: CAH correlations · RBBN correlations
