PKG vs ZKIN: Correlation
Measured on weekly returns over the past three years, Packaging Corporation of America (PKG) and ZK International Group Co., Ltd (ZKIN) carry a correlation of -0.28, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PKG and ZKIN?
Across a 3-year window, the weekly returns of PKG and ZKIN correlate at -0.28, negative, meaning they tend to move in opposite directions. The past 12 months show a tighter link (-0.10) than the 3-year average (-0.28). Stretching to 5 years gives -0.18, with an annualized covariance of -1964.3 %².
Out of 32 assets tracked against PKG, ZKIN lands near the bottom at #29. Correlation aside, the last 12 months split them widely, with PKG ahead by 60.1 points (+18.5% versus -41.6%). One caveat on sizing: ZKIN is 12.6 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
PKG vs ZKIN: side by side
| PKG (Packaging Corporation of America) | ZKIN (ZK International Group Co., Ltd) | |
|---|---|---|
| 1-year return | +18.5% | -41.6% |
| 5-year return | +86.8% | -68.9% |
| Volatility (ann.) | 23.5% | 296.5% |
| Beta vs S&P 500 | 0.52 | -1.03 |
| Max drawdown (3Y) | -28.4% | -74.7% |
| Market cap | $21.7B | $0.1B |
| P/E (trailing) | 31.6 | – |
| Dividend yield | 2.13% | 0.00% |
| Sector / category | Materials | US Listed |
Year-by-year returns
| Year | PKG | ZKIN |
|---|---|---|
| 2022 | -2.6% | -70.6% |
| 2023 | +31.9% | +140.2% |
| 2024 | +41.7% | -38.8% |
| 2025 | -6.1% | +150.0% |
| 2026 | +19.6% | -23.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PKG and ZKIN good diversifiers for each other?
By historical standards, yes. A correlation of -0.28 means the two rarely move for the same reasons.
FAQ
What is the correlation between PKG and ZKIN?
As of 2026-08-27, the correlation of weekly returns between PKG and ZKIN is -0.28 over 3 years, -0.10 over 1 year and -0.18 over 5 years.
Is ZKIN a good diversifier for PKG?
By historical standards, yes. A correlation of -0.28 means the two rarely move for the same reasons.
What does a correlation of -0.28 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/pkg-vs-zkin.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/pkg-vs-zkin/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: PKG correlations · ZKIN correlations
