BTBD vs FSTR: Correlation
How closely do BT Brands, Inc. (BTBD) and L.B. Foster Company (FSTR) trade together? Their weekly returns over three years give a correlation of -0.30, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BTBD and FSTR?
Over the past 3 years, BTBD and FSTR moved with a correlation of -0.30, which is negative, meaning they tend to move in opposite directions. The past 12 months show a weaker link (-0.53) than the 3-year average (-0.30). Over 5 years the correlation is -0.17, and the annualized covariance of weekly returns is -1125.7 %².
Out of 12 assets tracked against BTBD, FSTR lands near the bottom at #12. Correlation aside, the last 12 months split them widely, with FSTR ahead by 65.3 points (-22.5% versus +42.8%). Note the risk asymmetry: BTBD runs 1.8 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
BTBD vs FSTR: side by side
| BTBD (BT Brands, Inc.) | FSTR (L.B. Foster Company) | |
|---|---|---|
| 1-year return | -22.5% | +42.8% |
| 5-year return | -67.8% | +119.1% |
| Volatility (ann.) | 82.0% | 46.4% |
| Beta vs S&P 500 | 0.39 | 1.23 |
| Max drawdown (3Y) | -65.7% | -45.9% |
| Market cap | – | $0.4B |
| P/E (trailing) | – | 35.4 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BTBD | FSTR |
|---|---|---|
| 2022 | -38.1% | -29.6% |
| 2023 | +36.8% | +127.2% |
| 2024 | -42.4% | +22.3% |
| 2025 | -3.5% | +0.2% |
| 2026 | +2.1% | +40.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BTBD and FSTR good diversifiers for each other?
Yes: at -0.30, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between BTBD and FSTR?
As of 2026-08-27, the correlation of weekly returns between BTBD and FSTR is -0.30 over 3 years, -0.53 over 1 year and -0.17 over 5 years.
Is FSTR a good diversifier for BTBD?
Yes: at -0.30, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.30 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/btbd-vs-fstr.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/btbd-vs-fstr/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BTBD correlations · FSTR correlations
