ADP vs MRSH: Correlation
Automatic Data Processing (ADP) and Marsh McLennan (MRSH) show a moderate relationship: their 3-year correlation of weekly returns is 0.56.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ADP and MRSH?
Across a 3-year window, the weekly returns of ADP and MRSH correlate at 0.56, moderate. The relationship has been stable: the 1-year correlation (0.58) sits close to the 3-year figure. Stretching to 5 years gives 0.63, with an annualized covariance of 219.2 %².
Within ADP's tracked universe of 43 assets, MRSH comes in at #11 by 3-year correlation. Twelve-month performance is nearly a tie, at -3.5% for ADP and -6.0% for MRSH. On a rolling one-year basis the correlation drifted between 0.29 and 0.73, 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.
ADP vs MRSH: side by side
| ADP (Automatic Data Processing) | MRSH (Marsh McLennan) | |
|---|---|---|
| 1-year return | -3.5% | -6.0% |
| 5-year return | +52.0% | +31.3% |
| Volatility (ann.) | 21.7% | 18.1% |
| Beta vs S&P 500 | 0.53 | 0.33 |
| Max drawdown (3Y) | -40.8% | -34.4% |
| Market cap | $113.1B | $90.7B |
| P/E (trailing) | 26.0 | 23.6 |
| Dividend yield | 2.36% | 1.91% |
| Sector / category | Industrials | Financials |
Year-by-year returns
| Year | ADP | MRSH |
|---|---|---|
| 2022 | -1.3% | -3.5% |
| 2023 | -0.2% | +16.1% |
| 2024 | +28.4% | +13.7% |
| 2025 | -10.2% | -11.3% |
| 2026 | +12.4% | +4.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ADP and MRSH good diversifiers for each other?
Somewhat, no more. With 0.56 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between ADP and MRSH?
The ADP/MRSH correlation stands at 0.56 on a 3-year window (1 year: 0.58, 5 years: 0.63), computed from weekly returns as of 2026-08-27.
Is MRSH a good diversifier for ADP?
Somewhat, no more. With 0.56 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.56 mean?
A reading of 0.56 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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Related comparisons
Hubs: ADP correlations · MRSH correlations
