MCO vs MRSH: Correlation
How closely do Moody's Corporation (MCO) and Marsh McLennan (MRSH) trade together? Their weekly returns over three years give a correlation of 0.53, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MCO and MRSH?
Across a 3-year window, the weekly returns of MCO and MRSH correlate at 0.53, moderate. Recent behaviour matches the longer record: 0.57 over 1 year against 0.53 over 3. Stretching to 5 years gives 0.61, with an annualized covariance of 246.3 %².
Within MCO's tracked universe of 53 assets, MRSH comes in at #28 by 3-year correlation. The trailing year gives MCO the advantage: +0.7% versus -6.0%, a 6.7-point spread. The rolling one-year correlation moved between 0.26 and 0.66 over the past three years, a moderate range.
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.
MCO vs MRSH: side by side
| MCO (Moody's Corporation) | MRSH (Marsh McLennan) | |
|---|---|---|
| 1-year return | +0.7% | -6.0% |
| 5-year return | +39.4% | +31.3% |
| Volatility (ann.) | 25.8% | 18.1% |
| Beta vs S&P 500 | 1.08 | 0.33 |
| Max drawdown (3Y) | -24.7% | -34.4% |
| Market cap | $88.2B | $90.7B |
| P/E (trailing) | 32.7 | 23.6 |
| Dividend yield | 0.77% | 1.91% |
| Sector / category | Financials | Financials |
Year-by-year returns
| Year | MCO | MRSH |
|---|---|---|
| 2022 | -28.0% | -3.5% |
| 2023 | +41.5% | +16.1% |
| 2024 | +22.2% | +13.7% |
| 2025 | +8.7% | -11.3% |
| 2026 | +0.3% | +4.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MCO and MRSH good diversifiers for each other?
To a limited degree. At 0.53 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between MCO and MRSH?
Using weekly returns as of 2026-08-27: 0.53 over 3 years, with 0.57 over the last year and 0.61 over 5 years.
Is MRSH a good diversifier for MCO?
To a limited degree. At 0.53 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.53 mean?
On the −1 to +1 scale, 0.53 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.
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Related comparisons
Hubs: MCO correlations · MRSH correlations
