CTOS vs ECVT: Correlation
Measured on weekly returns over the past three years, Custom Truck One Source, Inc. (CTOS) and Ecovyst Inc. (ECVT) carry a correlation of 0.51, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CTOS and ECVT?
Across a 3-year window, the weekly returns of CTOS and ECVT correlate at 0.51, moderate. The past 12 months show a weaker link (0.35) than the 3-year average (0.51). Stretching to 5 years gives 0.50, with an annualized covariance of 1107.2 %².
By 3-year correlation, ECVT places #6 of the 13 assets tracked against CTOS. The last year tells two different stories: CTOS led by 49.8 percentage points, +61.3% for CTOS against +11.5% for ECVT.
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.
CTOS vs ECVT: side by side
| CTOS (Custom Truck One Source, Inc.) | ECVT (Ecovyst Inc.) | |
|---|---|---|
| 1-year return | +61.3% | +11.5% |
| 5-year return | +8.1% | -23.2% |
| Volatility (ann.) | 54.4% | 39.7% |
| Beta vs S&P 500 | 1.42 | 0.82 |
| Max drawdown (3Y) | -55.6% | -52.2% |
| Market cap | $2.2B | $1.1B |
| P/E (trailing) | 107.3 | 44.1 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CTOS | ECVT |
|---|---|---|
| 2022 | -21.0% | -13.5% |
| 2023 | -2.2% | +10.3% |
| 2024 | -22.2% | -21.8% |
| 2025 | +19.8% | +27.4% |
| 2026 | +67.7% | +4.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CTOS and ECVT good diversifiers for each other?
To a limited degree. At 0.51 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 CTOS and ECVT?
Using weekly returns as of 2026-08-27: 0.51 over 3 years, with 0.35 over the last year and 0.50 over 5 years.
Is ECVT a good diversifier for CTOS?
To a limited degree. At 0.51 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 0.51 mean?
On the −1 to +1 scale, 0.51 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/ctos-vs-ecvt.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/ctos-vs-ecvt/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: CTOS correlations · ECVT correlations
