ATMU vs PCAR: Correlation
How closely do Atmus Filtration Technologies Inc. (ATMU) and Paccar (PCAR) trade together? Their weekly returns over three years give a correlation of 0.57, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ATMU and PCAR?
Across a 3-year window, the weekly returns of ATMU and PCAR correlate at 0.57, moderate. The relationship has been stable: the 1-year correlation (0.63) sits close to the 3-year figure. Stretching to 5 years gives n/a, with an annualized covariance of 441.9 %².
By 3-year correlation, PCAR places #7 of the 12 assets tracked against ATMU. The last year tells two different stories: PCAR led by 17.9 percentage points, +9.9% for ATMU against +27.8% for PCAR.
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.
ATMU vs PCAR: side by side
| ATMU (Atmus Filtration Technologies Inc.) | PCAR (Paccar) | |
|---|---|---|
| 1-year return | +9.9% | +27.8% |
| 5-year return | n/a | +177.9% |
| Volatility (ann.) | 32.4% | 24.1% |
| Beta vs S&P 500 | 1.02 | 0.74 |
| Max drawdown (3Y) | -30.2% | -27.7% |
| Market cap | $4.0B | $66.6B |
| P/E (trailing) | 19.0 | 26.6 |
| Dividend yield | 0.45% | 1.04% |
| Sector / category | US Listed | Industrials |
Year-by-year returns
| Year | ATMU | PCAR |
|---|---|---|
| 2022 | – | +17.0% |
| 2023 | – | +55.0% |
| 2024 | +67.3% | +10.8% |
| 2025 | +33.2% | +8.0% |
| 2026 | -5.8% | +16.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ATMU and PCAR good diversifiers for each other?
To a limited degree. At 0.57 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between ATMU and PCAR?
As of 2026-08-27, the correlation of weekly returns between ATMU and PCAR is 0.57 over 3 years, 0.63 over 1 year and n/a over 5 years.
Is PCAR a good diversifier for ATMU?
To a limited degree. At 0.57 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.57 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/atmu-vs-pcar.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/atmu-vs-pcar/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ATMU correlations · PCAR correlations
