CACI vs TTEK: Correlation
CACI International, Inc. (CACI) and Tetra Tech, Inc. (TTEK) show a moderate relationship: their 3-year correlation of weekly returns is 0.48.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CACI and TTEK?
On 3 years of weekly data the CACI/TTEK correlation comes out at 0.48, moderate. The past 12 months show a weaker link (0.37) than the 3-year average (0.48). The 5-year figure is 0.45, and annualized covariance runs at 511.7 %².
By 3-year correlation, TTEK places #9 of the 16 assets tracked against CACI. Correlation aside, the last 12 months split them widely, with CACI ahead by 30.2 points (+30.1% versus -0.1%).
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.
CACI vs TTEK: side by side
| CACI (CACI International, Inc.) | TTEK (Tetra Tech, Inc.) | |
|---|---|---|
| 1-year return | +30.1% | -0.1% |
| 5-year return | +146.9% | +32.3% |
| Volatility (ann.) | 35.3% | 30.3% |
| Beta vs S&P 500 | 0.56 | 0.54 |
| Max drawdown (3Y) | -42.9% | -47.5% |
| Market cap | $14.0B | $9.4B |
| P/E (trailing) | 25.8 | 22.1 |
| Dividend yield | 0.00% | 0.73% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CACI | TTEK |
|---|---|---|
| 2022 | +11.7% | -14.0% |
| 2023 | +7.7% | +15.7% |
| 2024 | +24.8% | +20.0% |
| 2025 | +31.9% | -15.2% |
| 2026 | +19.0% | +9.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CACI and TTEK good diversifiers for each other?
Reasonably. At 0.48, CACI and TTEK keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between CACI and TTEK?
As of 2026-08-27, the correlation of weekly returns between CACI and TTEK is 0.48 over 3 years, 0.37 over 1 year and 0.45 over 5 years.
Is TTEK a good diversifier for CACI?
Reasonably. At 0.48, CACI and TTEK keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.48 mean?
On the −1 to +1 scale, 0.48 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/caci-vs-ttek.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/caci-vs-ttek/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: CACI correlations · TTEK correlations
