MRSH vs RLI: Correlation
Marsh McLennan (MRSH) and RLI Corp. (RLI) show a moderate relationship: their 3-year correlation of weekly returns is 0.53.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MRSH and RLI?
Over the past 3 years, MRSH and RLI moved with a correlation of 0.53, which is moderate. The relationship has been stable: the 1-year correlation (0.49) sits close to the 3-year figure. Over 5 years the correlation is 0.50, and the annualized covariance of weekly returns is 213.0 %².
Among the 38 assets we track against MRSH, RLI ranks #13 by 3-year correlation. Over the last 12 months RLI came out ahead by 7.9 percentage points (-6.0% against +1.9%).
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.
MRSH vs RLI: side by side
| MRSH (Marsh McLennan) | RLI (RLI Corp.) | |
|---|---|---|
| 1-year return | -6.0% | +1.9% |
| 5-year return | +31.3% | +46.7% |
| Volatility (ann.) | 18.1% | 22.2% |
| Beta vs S&P 500 | 0.33 | 0.18 |
| Max drawdown (3Y) | -34.4% | -43.5% |
| Market cap | $90.7B | $5.9B |
| P/E (trailing) | 23.6 | 13.5 |
| Dividend yield | 1.91% | 1.02% |
| Sector / category | Financials | US Listed |
Year-by-year returns
| Year | MRSH | RLI |
|---|---|---|
| 2022 | -3.5% | +24.8% |
| 2023 | +16.1% | +3.8% |
| 2024 | +13.7% | +27.6% |
| 2025 | -11.3% | -19.1% |
| 2026 | +4.0% | +5.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MRSH and RLI good diversifiers for each other?
Somewhat, no more. With 0.53 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between MRSH and RLI?
The MRSH/RLI correlation stands at 0.53 on a 3-year window (1 year: 0.49, 5 years: 0.50), computed from weekly returns as of 2026-08-27.
Is RLI a good diversifier for MRSH?
Somewhat, no more. With 0.53 correlation, most large moves hit both names, and the diversification benefit stays modest.
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.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/mrsh-vs-rli.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/mrsh-vs-rli/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: MRSH correlations · RLI correlations
