PDEX vs SXC: Correlation
How closely do Pro-Dex, Inc. (PDEX) and SunCoke Energy, Inc. (SXC) trade together? Their weekly returns over three years give a correlation of 0.26, which is weak.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PDEX and SXC?
On 3 years of weekly data the PDEX/SXC correlation comes out at 0.26, weak. Recent behaviour matches the longer record: 0.20 over 1 year against 0.26 over 3. The 5-year figure is 0.21, and annualized covariance runs at 618.0 %².
Among the 31 assets we track against PDEX, SXC ranks #4 by 3-year correlation. Their 12-month results are close: +42.5% for PDEX against +45.9% for SXC.
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.
PDEX vs SXC: side by side
| PDEX (Pro-Dex, Inc.) | SXC (SunCoke Energy, Inc.) | |
|---|---|---|
| 1-year return | +42.5% | +45.9% |
| 5-year return | +152.4% | +84.8% |
| Volatility (ann.) | 59.6% | 40.5% |
| Beta vs S&P 500 | 0.17 | 0.74 |
| Max drawdown (3Y) | -65.3% | -52.0% |
| Market cap | $0.2B | $0.9B |
| P/E (trailing) | 17.5 | – |
| Dividend yield | 0.00% | 4.89% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | PDEX | SXC |
|---|---|---|
| 2022 | -31.5% | +35.9% |
| 2023 | +10.2% | +29.8% |
| 2024 | +166.8% | +4.0% |
| 2025 | -17.7% | -28.6% |
| 2026 | +68.6% | +49.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PDEX and SXC good diversifiers for each other?
A fair diversifier. At 0.26, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between PDEX and SXC?
As of 2026-08-27, the correlation of weekly returns between PDEX and SXC is 0.26 over 3 years, 0.20 over 1 year and 0.21 over 5 years.
Is SXC a good diversifier for PDEX?
A fair diversifier. At 0.26, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.26 mean?
A reading of 0.26 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/pdex-vs-sxc.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/pdex-vs-sxc/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: PDEX correlations · SXC correlations
