PSX vs REX: Correlation
Measured on weekly returns over the past three years, Phillips 66 (PSX) and REX American Resources Corporation (REX) carry a correlation of 0.42, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PSX and REX?
Across a 3-year window, the weekly returns of PSX and REX correlate at 0.42, moderate. The relationship has been stable: the 1-year correlation (0.45) sits close to the 3-year figure. Stretching to 5 years gives 0.39, with an annualized covariance of 569.4 %².
By 3-year correlation, REX places #21 of the 34 assets tracked against PSX. Correlation aside, the last 12 months split them widely, with PSX ahead by 51.5 points (+86.2% versus +34.7%).
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.
PSX vs REX: side by side
| PSX (Phillips 66) | REX (REX American Resources Corporation) | |
|---|---|---|
| 1-year return | +86.2% | +34.7% |
| 5-year return | +301.8% | +190.5% |
| Volatility (ann.) | 33.4% | 40.2% |
| Beta vs S&P 500 | 0.58 | 0.44 |
| Max drawdown (3Y) | -44.4% | -41.6% |
| Market cap | $96.1B | $1.3B |
| P/E (trailing) | 13.8 | 15.2 |
| Dividend yield | 2.04% | 0.00% |
| Sector / category | Energy | US Listed |
Year-by-year returns
| Year | PSX | REX |
|---|---|---|
| 2022 | +49.6% | -0.4% |
| 2023 | +33.1% | +48.5% |
| 2024 | -11.6% | -11.9% |
| 2025 | +17.5% | +55.0% |
| 2026 | +89.7% | +26.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PSX and REX good diversifiers for each other?
Reasonably. At 0.42, PSX and REX keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between PSX and REX?
Using weekly returns as of 2026-08-27: 0.42 over 3 years, with 0.45 over the last year and 0.39 over 5 years.
Is REX a good diversifier for PSX?
Reasonably. At 0.42, PSX and REX keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.42 mean?
On the −1 to +1 scale, 0.42 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/psx-vs-rex.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/psx-vs-rex/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: PSX correlations · REX correlations
