FSTR vs STRL: Correlation
L.B. Foster Company (FSTR) and Sterling Infrastructure, Inc. (STRL) show a moderate relationship: their 3-year correlation of weekly returns is 0.54.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FSTR and STRL?
On 3 years of weekly data the FSTR/STRL correlation comes out at 0.54, moderate. The link has tightened recently: the 1-year correlation (0.78) runs above the 3-year figure (0.54). The 5-year figure is 0.47, and annualized covariance runs at 1690.4 %².
In FSTR's tracked universe of 16 assets, STRL sits right near the top at #1. Their recent paths diverged sharply: over the last 12 months STRL outperformed by 32.2 percentage points (+42.8% for FSTR 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.
FSTR vs STRL: side by side
| FSTR (L.B. Foster Company) | STRL (Sterling Infrastructure, Inc.) | |
|---|---|---|
| 1-year return | +42.8% | +75.0% |
| 5-year return | +119.1% | +2095.9% |
| Volatility (ann.) | 46.4% | 66.9% |
| Beta vs S&P 500 | 1.23 | 2.13 |
| Max drawdown (3Y) | -45.9% | -51.1% |
| Market cap | $0.4B | $15.5B |
| P/E (trailing) | 35.4 | 36.5 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | FSTR | STRL |
|---|---|---|
| 2022 | -29.6% | +24.7% |
| 2023 | +127.2% | +168.1% |
| 2024 | +22.3% | +91.6% |
| 2025 | +0.2% | +81.8% |
| 2026 | +40.4% | +65.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FSTR and STRL good diversifiers for each other?
To a limited degree. At 0.54 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between FSTR and STRL?
Using weekly returns as of 2026-08-27: 0.54 over 3 years, with 0.78 over the last year and 0.47 over 5 years.
Is STRL a good diversifier for FSTR?
To a limited degree. At 0.54 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.54 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/fstr-vs-strl.json
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[](https://www.pairbook.io/pair/fstr-vs-strl/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: FSTR correlations · STRL correlations
