ACIW vs SSTI: Correlation
ACI Worldwide, Inc. (ACIW) and SoundThinking, Inc. (SSTI) show a moderate relationship: their 3-year correlation of weekly returns is 0.42.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACIW and SSTI?
On 3 years of weekly data the ACIW/SSTI correlation comes out at 0.42, moderate. The relationship has been stable: the 1-year correlation (0.44) sits close to the 3-year figure. The 5-year figure is 0.31, and annualized covariance runs at 799.0 %².
By 3-year correlation, SSTI places #15 of the 20 assets tracked against ACIW. Their recent paths diverged sharply: over the last 12 months ACIW outperformed by 61.1 percentage points (+11.8% for ACIW against -49.3% for SSTI). Note the risk asymmetry: SSTI runs 1.5 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.
ACIW vs SSTI: side by side
| ACIW (ACI Worldwide, Inc.) | SSTI (SoundThinking, Inc.) | |
|---|---|---|
| 1-year return | +11.8% | -49.3% |
| 5-year return | +69.0% | -83.7% |
| Volatility (ann.) | 35.3% | 53.5% |
| Beta vs S&P 500 | 1.07 | 1.25 |
| Max drawdown (3Y) | -35.0% | -78.3% |
| Market cap | $5.5B | $0.1B |
| P/E (trailing) | 24.3 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACIW | SSTI |
|---|---|---|
| 2022 | -33.7% | +14.6% |
| 2023 | +33.0% | -24.5% |
| 2024 | +69.6% | -48.9% |
| 2025 | -7.9% | -38.5% |
| 2026 | +13.4% | -21.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACIW and SSTI good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.42 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between ACIW and SSTI?
The ACIW/SSTI correlation stands at 0.42 on a 3-year window (1 year: 0.44, 5 years: 0.31), computed from weekly returns as of 2026-08-27.
Is SSTI a good diversifier for ACIW?
Yes, to a useful degree: a correlation of 0.42 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.42 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/aciw-vs-ssti.json
Markdown for the live badge, attribution link included:
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Related comparisons
Hubs: ACIW correlations · SSTI correlations
