ASYS vs BTBD: Correlation
Measured on weekly returns over the past three years, Amtech Systems, Inc. (ASYS) and BT Brands, Inc. (BTBD) carry a correlation of -0.21, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ASYS and BTBD?
Over the past 3 years, ASYS and BTBD moved with a correlation of -0.21, which is negative, meaning they tend to move in opposite directions. The relationship has been stable: the 1-year correlation (-0.17) sits close to the 3-year figure. Over 5 years the correlation is -0.18, and the annualized covariance of weekly returns is -1244.3 %².
Among the 10 assets we track against ASYS, BTBD sits near the bottom by co-movement, at rank #8. Correlation aside, the last 12 months split them widely, with ASYS ahead by 187.7 points (+165.2% versus -22.5%).
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.
ASYS vs BTBD: side by side
| ASYS (Amtech Systems, Inc.) | BTBD (BT Brands, Inc.) | |
|---|---|---|
| 1-year return | +165.2% | -22.5% |
| 5-year return | +54.0% | -67.8% |
| Volatility (ann.) | 71.9% | 82.0% |
| Beta vs S&P 500 | 0.92 | 0.39 |
| Max drawdown (3Y) | -61.3% | -65.7% |
| Market cap | $0.3B | – |
| P/E (trailing) | 56.5 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ASYS | BTBD |
|---|---|---|
| 2022 | -23.1% | -38.1% |
| 2023 | -44.7% | +36.8% |
| 2024 | +29.8% | -42.4% |
| 2025 | +130.3% | -3.5% |
| 2026 | +26.1% | +2.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ASYS and BTBD good diversifiers for each other?
Yes: at -0.21, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between ASYS and BTBD?
The ASYS/BTBD correlation stands at -0.21 on a 3-year window (1 year: -0.17, 5 years: -0.18), computed from weekly returns as of 2026-08-27.
Is BTBD a good diversifier for ASYS?
Yes: at -0.21, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.21 mean?
On the −1 to +1 scale, -0.21 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.
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Related comparisons
Hubs: ASYS correlations · BTBD correlations
