CRH vs MLM: Correlation
How closely do CRH plc (CRH) and Martin Marietta Materials (MLM) trade together? Their weekly returns over three years give a correlation of 0.75, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CRH and MLM?
On 3 years of weekly data the CRH/MLM correlation comes out at 0.75, strong. Recent behaviour matches the longer record: 0.83 over 1 year against 0.75 over 3. The 5-year figure is 0.67, and annualized covariance runs at 529.8 %².
In CRH's tracked universe of 40 assets, MLM sits right near the top at #1. Twelve-month performance is nearly a tie, at -14.6% for CRH and -13.8% for MLM. The rolling one-year correlation stayed in a tight band between 0.59 and 0.82 over the past three years, which points to a structural rather than episodic relationship.
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.
CRH vs MLM: side by side
| CRH (CRH plc) | MLM (Martin Marietta Materials) | |
|---|---|---|
| 1-year return | -14.6% | -13.8% |
| 5-year return | +104.1% | +42.4% |
| Volatility (ann.) | 29.7% | 23.9% |
| Beta vs S&P 500 | 1.26 | 0.85 |
| Max drawdown (3Y) | -28.4% | -26.8% |
| Market cap | $63.6B | $37.5B |
| P/E (trailing) | 17.2 | 34.4 |
| Dividend yield | 1.57% | 0.62% |
| Sector / category | Materials | Materials |
Year-by-year returns
| Year | CRH | MLM |
|---|---|---|
| 2022 | -20.5% | -22.7% |
| 2023 | +81.3% | +48.6% |
| 2024 | +35.9% | +4.1% |
| 2025 | +35.9% | +21.3% |
| 2026 | -22.6% | -14.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CRH and MLM good diversifiers for each other?
Somewhat, no more. With 0.75 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between CRH and MLM?
As of 2026-08-27, the correlation of weekly returns between CRH and MLM is 0.75 over 3 years, 0.83 over 1 year and 0.67 over 5 years.
Is MLM a good diversifier for CRH?
Somewhat, no more. With 0.75 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.75 mean?
A reading of 0.75 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/crh-vs-mlm.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/crh-vs-mlm/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CRH correlations · MLM correlations
