COR vs MCK: Correlation
Cencora (COR) and McKesson Corporation (MCK) show a strong relationship: their 3-year correlation of weekly returns is 0.68.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COR and MCK?
On 3 years of weekly data the COR/MCK correlation comes out at 0.68, strong. Recent behaviour matches the longer record: 0.73 over 1 year against 0.68 over 3. The 5-year figure is 0.75, and annualized covariance runs at 377.1 %².
In COR's tracked universe of 43 assets, MCK sits right near the top at #1. The last year tells two different stories: MCK led by 19.4 percentage points, +11.4% for COR against +30.8% for MCK. The link looks structural: the rolling one-year correlation barely moved, holding between 0.60 and 0.84.
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 MCK: side by side
| COR (Cencora) | MCK (McKesson Corporation) | |
|---|---|---|
| 1-year return | +11.4% | +30.8% |
| 5-year return | +188.6% | +354.8% |
| Volatility (ann.) | 21.9% | 25.1% |
| Beta vs S&P 500 | 0.08 | 0.16 |
| Max drawdown (3Y) | -32.4% | -27.2% |
| Market cap | $61.3B | $103.8B |
| P/E (trailing) | 24.3 | 24.0 |
| Dividend yield | 0.72% | 0.37% |
| Sector / category | Health Care | Health Care |
Year-by-year returns
| Year | COR | MCK |
|---|---|---|
| 2022 | +26.3% | +51.8% |
| 2023 | +25.3% | +24.1% |
| 2024 | +10.4% | +23.7% |
| 2025 | +51.5% | +44.5% |
| 2026 | -4.3% | +8.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COR and MCK good diversifiers for each other?
Somewhat, no more. With 0.68 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between COR and MCK?
Using weekly returns as of 2026-08-27: 0.68 over 3 years, with 0.73 over the last year and 0.75 over 5 years.
Is MCK a good diversifier for COR?
Somewhat, no more. With 0.68 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.68 mean?
A reading of 0.68 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/cor-vs-mck.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cor-vs-mck/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: COR correlations · MCK correlations
