MLM vs RPM: Correlation
Measured on weekly returns over the past three years, Martin Marietta Materials (MLM) and RPM International Inc. (RPM) carry a correlation of 0.60, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MLM and RPM?
Across a 3-year window, the weekly returns of MLM and RPM correlate at 0.60, strong. Little has changed lately, as the 1-year reading of 0.66 lands near the 3-year figure. Stretching to 5 years gives 0.54, with an annualized covariance of 356.8 %².
Within MLM's tracked universe of 36 assets, RPM comes in at #13 by 3-year correlation. Neither side won the trailing year by much: -13.8% against -14.3%.
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.
MLM vs RPM: side by side
| MLM (Martin Marietta Materials) | RPM (RPM International Inc.) | |
|---|---|---|
| 1-year return | -13.8% | -14.3% |
| 5-year return | +42.4% | +38.7% |
| Volatility (ann.) | 23.9% | 25.0% |
| Beta vs S&P 500 | 0.85 | 0.85 |
| Max drawdown (3Y) | -26.8% | -32.0% |
| Market cap | $37.5B | $13.5B |
| P/E (trailing) | 34.4 | 20.7 |
| Dividend yield | 0.62% | 1.99% |
| Sector / category | Materials | US Listed |
Year-by-year returns
| Year | MLM | RPM |
|---|---|---|
| 2022 | -22.7% | -1.7% |
| 2023 | +48.6% | +16.8% |
| 2024 | +4.1% | +12.1% |
| 2025 | +21.3% | -13.9% |
| 2026 | -14.9% | +3.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MLM and RPM good diversifiers for each other?
Somewhat, no more. With 0.60 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between MLM and RPM?
Using weekly returns as of 2026-08-27: 0.60 over 3 years, with 0.66 over the last year and 0.54 over 5 years.
Is RPM a good diversifier for MLM?
Somewhat, no more. With 0.60 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.60 mean?
A reading of 0.60 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/mlm-vs-rpm.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/mlm-vs-rpm/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: MLM correlations · RPM correlations
