FIX vs ZKIN: Correlation
How closely do Comfort Systems USA (FIX) and ZK International Group Co., Ltd (ZKIN) trade together? Their weekly returns over three years give a correlation of -0.22, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FIX and ZKIN?
On 3 years of weekly data the FIX/ZKIN correlation comes out at -0.22, negative, meaning they tend to move in opposite directions. The link has tightened recently: the 1-year correlation (-0.10) runs above the 3-year figure (-0.22). The 5-year figure is -0.15, and annualized covariance runs at -3103.8 %².
Within FIX's tracked universe of 37 assets, ZKIN comes in at #31 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months FIX outperformed by 169.6 percentage points (+128.0% for FIX against -41.6% for ZKIN). Risk is not evenly split, since ZKIN carries 6.3 times the volatility of the other side.
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 ZKIN: side by side
| FIX (Comfort Systems USA) | ZKIN (ZK International Group Co., Ltd) | |
|---|---|---|
| 1-year return | +128.0% | -41.6% |
| 5-year return | +2077.9% | -68.9% |
| Volatility (ann.) | 47.4% | 296.5% |
| Beta vs S&P 500 | 1.74 | -1.03 |
| Max drawdown (3Y) | -46.0% | -74.7% |
| Market cap | $56.8B | $0.1B |
| P/E (trailing) | 39.8 | – |
| Dividend yield | 0.16% | 0.00% |
| Sector / category | Industrials | US Listed |
Year-by-year returns
| Year | FIX | ZKIN |
|---|---|---|
| 2022 | +17.0% | -70.6% |
| 2023 | +79.6% | +140.2% |
| 2024 | +106.9% | -38.8% |
| 2025 | +120.9% | +150.0% |
| 2026 | +73.3% | -23.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FIX and ZKIN good diversifiers for each other?
By historical standards, yes. A correlation of -0.22 means the two rarely move for the same reasons.
FAQ
What is the correlation between FIX and ZKIN?
As of 2026-08-27, the correlation of weekly returns between FIX and ZKIN is -0.22 over 3 years, -0.10 over 1 year and -0.15 over 5 years.
Is ZKIN a good diversifier for FIX?
By historical standards, yes. A correlation of -0.22 means the two rarely move for the same reasons.
What does a correlation of -0.22 mean?
A reading of -0.22 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/fix-vs-zkin.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/fix-vs-zkin/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: FIX correlations · ZKIN correlations
