CET vs EFX: Correlation
How closely do Central Securities Corporation (CET) and Equifax (EFX) trade together? Their weekly returns over three years give a correlation of 0.57, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CET and EFX?
Over the past 3 years, CET and EFX moved with a correlation of 0.57, which is moderate. The link has loosened recently: the 1-year correlation (0.39) runs below the 3-year figure (0.57). Over 5 years the correlation is 0.59, and the annualized covariance of weekly returns is 241.5 %².
By 3-year correlation, EFX places #12 of the 38 assets tracked against CET. Their recent paths diverged sharply: over the last 12 months CET outperformed by 37.5 percentage points (+15.7% for CET against -21.8% for EFX). Note the risk asymmetry: EFX runs 2.6 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.
CET vs EFX: side by side
| CET (Central Securities Corporation) | EFX (Equifax) | |
|---|---|---|
| 1-year return | +15.7% | -21.8% |
| 5-year return | +73.3% | -26.0% |
| Volatility (ann.) | 12.8% | 33.3% |
| Beta vs S&P 500 | 0.78 | 1.25 |
| Max drawdown (3Y) | -15.4% | -49.7% |
| Market cap | – | $22.4B |
| P/E (trailing) | 7.3 | 33.5 |
| Dividend yield | 5.03% | 1.11% |
| Sector / category | US Listed | Industrials |
Year-by-year returns
| Year | CET | EFX |
|---|---|---|
| 2022 | -19.7% | -33.1% |
| 2023 | +19.2% | +28.2% |
| 2024 | +26.8% | +3.7% |
| 2025 | +17.2% | -14.2% |
| 2026 | +8.3% | -11.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CET and EFX good diversifiers for each other?
To a limited degree. At 0.57 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 CET and EFX?
Using weekly returns as of 2026-08-27: 0.57 over 3 years, with 0.39 over the last year and 0.59 over 5 years.
Is EFX a good diversifier for CET?
To a limited degree. At 0.57 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 0.57 mean?
On the −1 to +1 scale, 0.57 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/cet-vs-efx.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/cet-vs-efx/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CET correlations · EFX correlations
