ASYS vs PETZ: Correlation
Measured on weekly returns over the past three years, Amtech Systems, Inc. (ASYS) and TDH Holdings, Inc. (PETZ) carry a correlation of 0.34, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ASYS and PETZ?
Over the past 3 years, ASYS and PETZ moved with a correlation of 0.34, which is moderate. Little has changed lately, as the 1-year reading of 0.34 lands near the 3-year figure. Over 5 years the correlation is 0.20, and the annualized covariance of weekly returns is 1426.7 %².
Few assets follow ASYS as closely as PETZ, which ranks #3 of 10 tracked partners. The last year tells two different stories: ASYS led by 137.8 percentage points, +165.2% for ASYS against +27.4% for PETZ.
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 PETZ: side by side
| ASYS (Amtech Systems, Inc.) | PETZ (TDH Holdings, Inc.) | |
|---|---|---|
| 1-year return | +165.2% | +27.4% |
| 5-year return | +54.0% | -97.2% |
| Volatility (ann.) | 71.9% | 58.5% |
| Beta vs S&P 500 | 0.92 | 0.40 |
| Max drawdown (3Y) | -61.3% | -51.2% |
| Market cap | $0.3B | – |
| P/E (trailing) | 56.5 | 6.9 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ASYS | PETZ |
|---|---|---|
| 2022 | -23.1% | -98.0% |
| 2023 | -44.7% | -25.8% |
| 2024 | +29.8% | +8.7% |
| 2025 | +130.3% | -27.2% |
| 2026 | +26.1% | +37.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ASYS and PETZ good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.34 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between ASYS and PETZ?
The ASYS/PETZ correlation stands at 0.34 on a 3-year window (1 year: 0.34, 5 years: 0.20), computed from weekly returns as of 2026-08-27.
Is PETZ a good diversifier for ASYS?
Yes, to a useful degree: a correlation of 0.34 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.34 mean?
On the −1 to +1 scale, 0.34 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 · PETZ correlations
