CDTG vs GBX: Correlation
Measured on weekly returns over the past three years, CDT Environmental Technology Investment Holdings Limited (CDTG) and Greenbrier Companies, Inc. (The) (GBX) carry a correlation of -0.26, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CDTG and GBX?
On 3 years of weekly data the CDTG/GBX correlation comes out at -0.26, negative, meaning they tend to move in opposite directions. The link has loosened recently: the 1-year correlation (-0.37) runs below the 3-year figure (-0.26). The 5-year figure is n/a, and annualized covariance runs at -1467.8 %².
Among the 34 assets we track against CDTG, GBX sits near the bottom by co-movement, at rank #30. The last year tells two different stories: GBX led by 93.1 percentage points, -92.6% for CDTG against +0.5% for GBX. Note the risk asymmetry: CDTG runs 4.4 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
CDTG vs GBX: side by side
| CDTG (CDT Environmental Technology Investment Holdings Limited) | GBX (Greenbrier Companies, Inc. (The)) | |
|---|---|---|
| 1-year return | -92.6% | +0.5% |
| 5-year return | n/a | +19.2% |
| Volatility (ann.) | 160.6% | 36.2% |
| Beta vs S&P 500 | 0.42 | 0.71 |
| Max drawdown (3Y) | -99.2% | -43.7% |
| Market cap | – | $1.4B |
| P/E (trailing) | – | 13.6 |
| Dividend yield | 0.00% | 2.81% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CDTG | GBX |
|---|---|---|
| 2022 | – | -24.8% |
| 2023 | – | +36.3% |
| 2024 | – | +41.3% |
| 2025 | -92.2% | -21.3% |
| 2026 | -87.0% | +0.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CDTG and GBX good diversifiers for each other?
Yes: at -0.26, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between CDTG and GBX?
The CDTG/GBX correlation stands at -0.26 on a 3-year window (1 year: -0.37, 5 years: n/a), computed from weekly returns as of 2026-08-27.
Is GBX a good diversifier for CDTG?
Yes: at -0.26, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.26 mean?
On the −1 to +1 scale, -0.26 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/cdtg-vs-gbx.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/cdtg-vs-gbx/)
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Related comparisons
Hubs: CDTG correlations · GBX correlations
