FIX vs STRL: Correlation
Measured on weekly returns over the past three years, Comfort Systems USA (FIX) and Sterling Infrastructure, Inc. (STRL) carry a correlation of 0.66, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FIX and STRL?
On 3 years of weekly data the FIX/STRL correlation comes out at 0.66, strong. The link has loosened recently: the 1-year correlation (0.53) runs below the 3-year figure (0.66). The 5-year figure is 0.60, and annualized covariance runs at 2091.1 %².
By 3-year correlation, STRL places #6 of the 37 assets tracked against FIX. Their recent paths diverged sharply: over the last 12 months FIX outperformed by 53.0 percentage points (+128.0% for FIX against +75.0% for STRL).
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.
FIX vs STRL: side by side
| FIX (Comfort Systems USA) | STRL (Sterling Infrastructure, Inc.) | |
|---|---|---|
| 1-year return | +128.0% | +75.0% |
| 5-year return | +2077.9% | +2095.9% |
| Volatility (ann.) | 47.4% | 66.9% |
| Beta vs S&P 500 | 1.74 | 2.13 |
| Max drawdown (3Y) | -46.0% | -51.1% |
| Market cap | $56.8B | $15.5B |
| P/E (trailing) | 39.8 | 36.5 |
| Dividend yield | 0.16% | 0.00% |
| Sector / category | Industrials | US Listed |
Year-by-year returns
| Year | FIX | STRL |
|---|---|---|
| 2022 | +17.0% | +24.7% |
| 2023 | +79.6% | +168.1% |
| 2024 | +106.9% | +91.6% |
| 2025 | +120.9% | +81.8% |
| 2026 | +73.3% | +65.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FIX and STRL good diversifiers for each other?
Only partially. A correlation of 0.66 means FIX and STRL 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 FIX and STRL?
Using weekly returns as of 2026-08-27: 0.66 over 3 years, with 0.53 over the last year and 0.60 over 5 years.
Is STRL a good diversifier for FIX?
Only partially. A correlation of 0.66 means FIX and STRL share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.66 mean?
On the −1 to +1 scale, 0.66 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/fix-vs-strl.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/fix-vs-strl/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: FIX correlations · STRL correlations
