KOP vs MTX: Correlation
How closely do Koppers Holdings Inc. (KOP) and Minerals Technologies Inc. (MTX) trade together? Their weekly returns over three years give a correlation of 0.54, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are KOP and MTX?
On 3 years of weekly data the KOP/MTX correlation comes out at 0.54, moderate. The relationship has been stable: the 1-year correlation (0.50) sits close to the 3-year figure. The 5-year figure is 0.55, and annualized covariance runs at 556.8 %².
By 3-year correlation, MTX places #5 of the 10 assets tracked against KOP. Their recent paths diverged sharply: over the last 12 months KOP outperformed by 48.1 percentage points (+60.1% for KOP against +12.0% for MTX).
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.
KOP vs MTX: side by side
| KOP (Koppers Holdings Inc.) | MTX (Minerals Technologies Inc.) | |
|---|---|---|
| 1-year return | +60.1% | +12.0% |
| 5-year return | +47.0% | -6.2% |
| Volatility (ann.) | 33.9% | 30.4% |
| Beta vs S&P 500 | 0.89 | 0.90 |
| Max drawdown (3Y) | -58.4% | -42.5% |
| Market cap | $0.9B | $2.3B |
| P/E (trailing) | – | – |
| Dividend yield | 0.73% | 0.65% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | KOP | MTX |
|---|---|---|
| 2022 | -9.2% | -16.7% |
| 2023 | +82.8% | +18.0% |
| 2024 | -36.3% | +7.4% |
| 2025 | -15.5% | -19.4% |
| 2026 | +71.8% | +19.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are KOP and MTX good diversifiers for each other?
Somewhat, no more. With 0.54 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between KOP and MTX?
Using weekly returns as of 2026-08-27: 0.54 over 3 years, with 0.50 over the last year and 0.55 over 5 years.
Is MTX a good diversifier for KOP?
Somewhat, no more. With 0.54 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.54 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/kop-vs-mtx.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/kop-vs-mtx/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: KOP correlations · MTX correlations
