TRT vs TTEK: Correlation
Measured on weekly returns over the past three years, Trio-Tech International (TRT) and Tetra Tech, Inc. (TTEK) carry a correlation of -0.22, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are TRT and TTEK?
Across a 3-year window, the weekly returns of TRT and TTEK correlate at -0.22, negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.31 lands near the 3-year figure. Stretching to 5 years gives -0.03, with an annualized covariance of -702.4 %².
Among the 104 assets we track against TRT, TTEK ranks #62 by 3-year correlation. The last year tells two different stories: TRT led by 295.6 percentage points, +295.5% for TRT against -0.1% for TTEK. Risk is not evenly split, since TRT carries 3.5 times the volatility of the other side.
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.
TRT vs TTEK: side by side
| TRT (Trio-Tech International) | TTEK (Tetra Tech, Inc.) | |
|---|---|---|
| 1-year return | +295.5% | -0.1% |
| 5-year return | +365.8% | +32.3% |
| Volatility (ann.) | 107.4% | 30.3% |
| Beta vs S&P 500 | 0.18 | 0.54 |
| Max drawdown (3Y) | -54.6% | -47.5% |
| Market cap | – | $9.4B |
| P/E (trailing) | 209.6 | 22.1 |
| Dividend yield | 0.00% | 0.73% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | TRT | TTEK |
|---|---|---|
| 2022 | -66.5% | -14.0% |
| 2023 | +12.7% | +15.7% |
| 2024 | +14.6% | +20.0% |
| 2025 | +127.9% | -15.2% |
| 2026 | +58.3% | +9.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are TRT and TTEK good diversifiers for each other?
By historical standards, yes. A correlation of -0.22 means the two rarely move for the same reasons.
FAQ
What is the correlation between TRT and TTEK?
The TRT/TTEK correlation stands at -0.22 on a 3-year window (1 year: -0.31, 5 years: -0.03), computed from weekly returns as of 2026-08-27.
Is TTEK a good diversifier for TRT?
By historical standards, yes. A correlation of -0.22 means the two rarely move for the same reasons.
What does a correlation of -0.22 mean?
A reading of -0.22 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/trt-vs-ttek.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/trt-vs-ttek/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: TRT correlations · TTEK correlations
