REX vs SST: Correlation
Measured on weekly returns over the past three years, REX American Resources Corporation (REX) and System1, Inc. (SST) carry a correlation of 0.37, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are REX and SST?
Over the past 3 years, REX and SST moved with a correlation of 0.37, which is moderate. The past 12 months show a tighter link (0.53) than the 3-year average (0.37). Over 5 years the correlation is 0.25, and the annualized covariance of weekly returns is 2246.8 %².
Within REX's tracked universe of 15 assets, SST comes in at #9 by 3-year correlation. Correlation aside, the last 12 months split them widely, with REX ahead by 110.2 points (+34.7% versus -75.5%). Note the risk asymmetry: SST runs 3.8 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.
REX vs SST: side by side
| REX (REX American Resources Corporation) | SST (System1, Inc.) | |
|---|---|---|
| 1-year return | +34.7% | -75.5% |
| 5-year return | +190.5% | -98.1% |
| Volatility (ann.) | 40.2% | 151.9% |
| Beta vs S&P 500 | 0.44 | 0.94 |
| Max drawdown (3Y) | -41.6% | -95.2% |
| Market cap | $1.3B | – |
| P/E (trailing) | 15.2 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | REX | SST |
|---|---|---|
| 2022 | -0.4% | -52.9% |
| 2023 | +48.5% | -52.7% |
| 2024 | -11.9% | -59.5% |
| 2025 | +55.0% | -56.3% |
| 2026 | +26.8% | -52.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are REX and SST good diversifiers for each other?
Reasonably. At 0.37, REX and SST keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between REX and SST?
The REX/SST correlation stands at 0.37 on a 3-year window (1 year: 0.53, 5 years: 0.25), computed from weekly returns as of 2026-08-27.
Is SST a good diversifier for REX?
Reasonably. At 0.37, REX and SST keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.37 mean?
On the −1 to +1 scale, 0.37 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/rex-vs-sst.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/rex-vs-sst/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: REX correlations · SST correlations
