ICFI vs TTEK: Correlation
ICF International, Inc. (ICFI) and Tetra Tech, Inc. (TTEK) show a moderate relationship: their 3-year correlation of weekly returns is 0.50.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ICFI and TTEK?
Across a 3-year window, the weekly returns of ICFI and TTEK correlate at 0.50, moderate. Recent behaviour matches the longer record: 0.53 over 1 year against 0.50 over 3. Stretching to 5 years gives 0.43, with an annualized covariance of 570.0 %².
Among the 13 assets we track against ICFI, TTEK ranks #7 by 3-year correlation. Over the last 12 months TTEK came out ahead by 9.3 percentage points (-9.4% against -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.
ICFI vs TTEK: side by side
| ICFI (ICF International, Inc.) | TTEK (Tetra Tech, Inc.) | |
|---|---|---|
| 1-year return | -9.4% | -0.1% |
| 5-year return | -2.1% | +32.3% |
| Volatility (ann.) | 37.8% | 30.3% |
| Beta vs S&P 500 | 0.60 | 0.54 |
| Max drawdown (3Y) | -65.6% | -47.5% |
| Market cap | $1.6B | $9.4B |
| P/E (trailing) | 18.4 | 22.1 |
| Dividend yield | 0.63% | 0.73% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ICFI | TTEK |
|---|---|---|
| 2022 | -2.9% | -14.0% |
| 2023 | +36.0% | +15.7% |
| 2024 | -10.8% | +20.0% |
| 2025 | -28.0% | -15.2% |
| 2026 | +5.7% | +9.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ICFI and TTEK good diversifiers for each other?
Only partially. A correlation of 0.50 means ICFI and TTEK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between ICFI and TTEK?
Using weekly returns as of 2026-08-27: 0.50 over 3 years, with 0.53 over the last year and 0.43 over 5 years.
Is TTEK a good diversifier for ICFI?
Only partially. A correlation of 0.50 means ICFI and TTEK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.50 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/icfi-vs-ttek.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/icfi-vs-ttek/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ICFI correlations · TTEK correlations
