COR vs ROK: Correlation
How closely do Cencora (COR) and Rockwell Automation (ROK) trade together? Their weekly returns over three years give a correlation of -0.23, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COR and ROK?
On 3 years of weekly data the COR/ROK correlation comes out at -0.23, negative, meaning they tend to move in opposite directions. The relationship has been stable: the 1-year correlation (-0.16) sits close to the 3-year figure. The 5-year figure is -0.05, and annualized covariance runs at -141.8 %².
Within COR's tracked universe of 43 assets, ROK comes in at #29 by 3-year correlation. On 12-month performance ROK holds a 14.3-point edge, +11.4% against +25.7%. Do not treat this figure as fixed: across three years the rolling one-year correlation ranged all the way from -0.42 to 0.18.
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.
COR vs ROK: side by side
| COR (Cencora) | ROK (Rockwell Automation) | |
|---|---|---|
| 1-year return | +11.4% | +25.7% |
| 5-year return | +188.6% | +44.9% |
| Volatility (ann.) | 21.9% | 27.9% |
| Beta vs S&P 500 | 0.08 | 0.97 |
| Max drawdown (3Y) | -32.4% | -29.0% |
| Market cap | $61.3B | $48.2B |
| P/E (trailing) | 24.3 | 40.6 |
| Dividend yield | 0.72% | 1.26% |
| Sector / category | Health Care | Industrials |
Year-by-year returns
| Year | COR | ROK |
|---|---|---|
| 2022 | +26.3% | -24.8% |
| 2023 | +25.3% | +22.6% |
| 2024 | +10.4% | -6.2% |
| 2025 | +51.5% | +38.4% |
| 2026 | -4.3% | +12.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COR and ROK good diversifiers for each other?
Yes. With a correlation of -0.23, COR and ROK have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between COR and ROK?
The COR/ROK correlation stands at -0.23 on a 3-year window (1 year: -0.16, 5 years: -0.05), computed from weekly returns as of 2026-08-27.
Is ROK a good diversifier for COR?
Yes. With a correlation of -0.23, COR and ROK have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.23 mean?
On the −1 to +1 scale, -0.23 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/cor-vs-rok.json
Embed this badge (it refreshes with the data), with attribution:
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Related comparisons
Hubs: COR correlations · ROK correlations
