MRSH vs WTW: Correlation
Measured on weekly returns over the past three years, Marsh McLennan (MRSH) and Willis Towers Watson (WTW) carry a correlation of 0.61, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MRSH and WTW?
Over the past 3 years, MRSH and WTW moved with a correlation of 0.61, which is strong. The relationship has been stable: the 1-year correlation (0.71) sits close to the 3-year figure. Over 5 years the correlation is 0.65, and the annualized covariance of weekly returns is 257.6 %².
By 3-year correlation, WTW places #4 of the 38 assets tracked against MRSH. The trailing year gives WTW the advantage: -6.0% versus +4.2%, a 10.2-point spread. On a rolling one-year basis the correlation drifted between 0.41 and 0.71, 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.
MRSH vs WTW: side by side
| MRSH (Marsh McLennan) | WTW (Willis Towers Watson) | |
|---|---|---|
| 1-year return | -6.0% | +4.2% |
| 5-year return | +31.3% | +68.3% |
| Volatility (ann.) | 18.1% | 23.5% |
| Beta vs S&P 500 | 0.33 | 0.32 |
| Max drawdown (3Y) | -34.4% | -30.4% |
| Market cap | $90.7B | $31.5B |
| P/E (trailing) | 23.6 | 21.2 |
| Dividend yield | 1.91% | 0.55% |
| Sector / category | Financials | Financials |
Year-by-year returns
| Year | MRSH | WTW |
|---|---|---|
| 2022 | -3.5% | +4.5% |
| 2023 | +16.1% | +0.1% |
| 2024 | +13.7% | +31.5% |
| 2025 | -11.3% | +6.1% |
| 2026 | +4.0% | +4.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MRSH and WTW good diversifiers for each other?
Only partially. A correlation of 0.61 means MRSH and WTW share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between MRSH and WTW?
The MRSH/WTW correlation stands at 0.61 on a 3-year window (1 year: 0.71, 5 years: 0.65), computed from weekly returns as of 2026-08-27.
Is WTW a good diversifier for MRSH?
Only partially. A correlation of 0.61 means MRSH and WTW share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.61 mean?
A reading of 0.61 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/mrsh-vs-wtw.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/mrsh-vs-wtw/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: MRSH correlations · WTW correlations
