AON vs ORLY: Correlation
Aon plc (AON) and O'Reilly Automotive (ORLY) show a moderate relationship: their 3-year correlation of weekly returns is 0.42.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AON and ORLY?
Over the past 3 years, AON and ORLY moved with a correlation of 0.42, which is moderate. Lately the two have drifted apart, with the 1-year correlation at 0.23 versus 0.42 over 3 years. Over 5 years the correlation is 0.48, and the annualized covariance of weekly returns is 179.7 %².
Within AON's tracked universe of 32 assets, ORLY comes in at #16 by 3-year correlation. The trailing year gives AON the advantage: -4.6% versus -15.6%, a 11.0-point spread. On a rolling one-year basis the correlation drifted between 0.17 and 0.61, 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.
AON vs ORLY: side by side
| AON (Aon plc) | ORLY (O'Reilly Automotive) | |
|---|---|---|
| 1-year return | -4.6% | -15.6% |
| 5-year return | +27.0% | +120.8% |
| Volatility (ann.) | 21.7% | 19.8% |
| Beta vs S&P 500 | 0.34 | 0.20 |
| Max drawdown (3Y) | -24.2% | -23.3% |
| Market cap | $74.2B | $71.1B |
| P/E (trailing) | 19.5 | 28.4 |
| Dividend yield | 0.86% | 0.00% |
| Sector / category | Financials | Consumer Discretionary |
Year-by-year returns
| Year | AON | ORLY |
|---|---|---|
| 2022 | +0.6% | +19.5% |
| 2023 | -2.3% | +12.6% |
| 2024 | +24.5% | +24.8% |
| 2025 | -1.2% | +15.4% |
| 2026 | -0.5% | -3.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AON and ORLY good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.42 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between AON and ORLY?
Using weekly returns as of 2026-08-27: 0.42 over 3 years, with 0.23 over the last year and 0.48 over 5 years.
Is ORLY a good diversifier for AON?
Yes, to a useful degree: a correlation of 0.42 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.42 mean?
A reading of 0.42 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-orly.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/aon-vs-orly/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: AON correlations · ORLY correlations
