AEE vs MCK: Correlation
Ameren (AEE) and McKesson Corporation (MCK) show a moderate relationship: their 3-year correlation of weekly returns is 0.35.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AEE and MCK?
Over the past 3 years, AEE and MCK moved with a correlation of 0.35, which is moderate. The relationship has been stable: the 1-year correlation (0.40) sits close to the 3-year figure. Over 5 years the correlation is 0.36, and the annualized covariance of weekly returns is 157.5 %².
By 3-year correlation, MCK places #23 of the 35 assets tracked against AEE. Their recent paths diverged sharply: over the last 12 months MCK outperformed by 22.0 percentage points (+8.8% for AEE against +30.8% for MCK). On a rolling one-year basis the correlation drifted between 0.12 and 0.53, a moderate band.
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.
AEE vs MCK: side by side
| AEE (Ameren) | MCK (McKesson Corporation) | |
|---|---|---|
| 1-year return | +8.8% | +30.8% |
| 5-year return | +39.7% | +354.8% |
| Volatility (ann.) | 17.8% | 25.1% |
| Beta vs S&P 500 | 0.10 | 0.16 |
| Max drawdown (3Y) | -16.5% | -27.2% |
| Market cap | $29.6B | $103.8B |
| P/E (trailing) | 19.0 | 24.0 |
| Dividend yield | 2.71% | 0.37% |
| Sector / category | Utilities | Health Care |
Year-by-year returns
| Year | AEE | MCK |
|---|---|---|
| 2022 | +2.5% | +51.8% |
| 2023 | -16.1% | +24.1% |
| 2024 | +27.5% | +23.7% |
| 2025 | +15.3% | +44.5% |
| 2026 | +8.4% | +8.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AEE and MCK good diversifiers for each other?
Reasonably. At 0.35, AEE and MCK keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between AEE and MCK?
Using weekly returns as of 2026-08-27: 0.35 over 3 years, with 0.40 over the last year and 0.36 over 5 years.
Is MCK a good diversifier for AEE?
Reasonably. At 0.35, AEE and MCK keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.35 mean?
On the −1 to +1 scale, 0.35 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/aee-vs-mck.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/aee-vs-mck/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: AEE correlations · MCK correlations
