EFX vs SSTI: Correlation
Equifax (EFX) and SoundThinking, Inc. (SSTI) show a moderate relationship: their 3-year correlation of weekly returns is 0.43.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are EFX and SSTI?
Across a 3-year window, the weekly returns of EFX and SSTI correlate at 0.43, moderate. Recent behaviour matches the longer record: 0.44 over 1 year against 0.43 over 3. Stretching to 5 years gives 0.36, with an annualized covariance of 768.5 %².
Within EFX's tracked universe of 53 assets, SSTI comes in at #38 by 3-year correlation. The last year tells two different stories: EFX led by 27.5 percentage points, -21.8% for EFX against -49.3% for SSTI. One caveat on sizing: SSTI is 1.6 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
EFX vs SSTI: side by side
| EFX (Equifax) | SSTI (SoundThinking, Inc.) | |
|---|---|---|
| 1-year return | -21.8% | -49.3% |
| 5-year return | -26.0% | -83.7% |
| Volatility (ann.) | 33.3% | 53.5% |
| Beta vs S&P 500 | 1.25 | 1.25 |
| Max drawdown (3Y) | -49.7% | -78.3% |
| Market cap | $22.4B | $0.1B |
| P/E (trailing) | 33.5 | – |
| Dividend yield | 1.11% | 0.00% |
| Sector / category | Industrials | US Listed |
Year-by-year returns
| Year | EFX | SSTI |
|---|---|---|
| 2022 | -33.1% | +14.6% |
| 2023 | +28.2% | -24.5% |
| 2024 | +3.7% | -48.9% |
| 2025 | -14.2% | -38.5% |
| 2026 | -11.7% | -21.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are EFX and SSTI good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.43 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between EFX and SSTI?
As of 2026-08-27, the correlation of weekly returns between EFX and SSTI is 0.43 over 3 years, 0.44 over 1 year and 0.36 over 5 years.
Is SSTI a good diversifier for EFX?
Yes, to a useful degree: a correlation of 0.43 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.43 mean?
A reading of 0.43 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/efx-vs-ssti.json
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[](https://www.pairbook.io/pair/efx-vs-ssti/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: EFX correlations · SSTI correlations
