AON vs RLI: Correlation
Measured on weekly returns over the past three years, Aon plc (AON) and RLI Corp. (RLI) carry a correlation of 0.48, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AON and RLI?
Across a 3-year window, the weekly returns of AON and RLI correlate at 0.48, moderate. Recent behaviour matches the longer record: 0.50 over 1 year against 0.48 over 3. Stretching to 5 years gives 0.42, with an annualized covariance of 232.4 %².
Among the 32 assets we track against AON, RLI ranks #12 by 3-year correlation. Over the last 12 months RLI came out ahead by 6.5 percentage points (-4.6% 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.
AON vs RLI: side by side
| AON (Aon plc) | RLI (RLI Corp.) | |
|---|---|---|
| 1-year return | -4.6% | +1.9% |
| 5-year return | +27.0% | +46.7% |
| Volatility (ann.) | 21.7% | 22.2% |
| Beta vs S&P 500 | 0.34 | 0.18 |
| Max drawdown (3Y) | -24.2% | -43.5% |
| Market cap | $74.2B | $5.9B |
| P/E (trailing) | 19.5 | 13.5 |
| Dividend yield | 0.86% | 1.02% |
| Sector / category | Financials | US Listed |
Year-by-year returns
| Year | AON | RLI |
|---|---|---|
| 2022 | +0.6% | +24.8% |
| 2023 | -2.3% | +3.8% |
| 2024 | +24.5% | +27.6% |
| 2025 | -1.2% | -19.1% |
| 2026 | -0.5% | +5.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AON and RLI good diversifiers for each other?
A fair diversifier. At 0.48, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between AON and RLI?
The AON/RLI correlation stands at 0.48 on a 3-year window (1 year: 0.50, 5 years: 0.42), computed from weekly returns as of 2026-08-27.
Is RLI a good diversifier for AON?
A fair diversifier. At 0.48, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.48 mean?
A reading of 0.48 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/aon-vs-rli.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/aon-vs-rli/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: AON correlations · RLI correlations
