ECL vs ORLY: Correlation
Ecolab (ECL) and O'Reilly Automotive (ORLY) show a moderate relationship: their 3-year correlation of weekly returns is 0.37.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ECL and ORLY?
Over the past 3 years, ECL and ORLY moved with a correlation of 0.37, which is moderate. The relationship has been stable: the 1-year correlation (0.40) sits close to the 3-year figure. Over 5 years the correlation is 0.40, and the annualized covariance of weekly returns is 141.7 %².
Among the 53 assets we track against ECL, ORLY ranks #41 by 3-year correlation. The last year tells two different stories: ECL led by 18.7 percentage points, +3.1% for ECL against -15.6% for ORLY. Stability stands out here, with the rolling one-year correlation confined to 0.24 through 0.46.
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.
ECL vs ORLY: side by side
| ECL (Ecolab) | ORLY (O'Reilly Automotive) | |
|---|---|---|
| 1-year return | +3.1% | -15.6% |
| 5-year return | +34.0% | +120.8% |
| Volatility (ann.) | 19.5% | 19.8% |
| Beta vs S&P 500 | 0.64 | 0.20 |
| Max drawdown (3Y) | -20.1% | -23.3% |
| Market cap | $80.1B | $71.1B |
| P/E (trailing) | 39.1 | 28.4 |
| Dividend yield | 0.98% | 0.00% |
| Sector / category | Materials | Consumer Discretionary |
Year-by-year returns
| Year | ECL | ORLY |
|---|---|---|
| 2022 | -37.1% | +19.5% |
| 2023 | +37.9% | +12.6% |
| 2024 | +19.3% | +24.8% |
| 2025 | +13.2% | +15.4% |
| 2026 | +9.5% | -3.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ECL and ORLY good diversifiers for each other?
A fair diversifier. At 0.37, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between ECL and ORLY?
As of 2026-08-27, the correlation of weekly returns between ECL and ORLY is 0.37 over 3 years, 0.40 over 1 year and 0.40 over 5 years.
Is ORLY a good diversifier for ECL?
A fair diversifier. At 0.37, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.37 mean?
A reading of 0.37 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/ecl-vs-orly.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/ecl-vs-orly/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ECL correlations · ORLY correlations
