GPK vs SON: Correlation
How closely do Graphic Packaging Holding Company (GPK) and Sonoco Products Company (SON) trade together? Their weekly returns over three years give a correlation of 0.54, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are GPK and SON?
Across a 3-year window, the weekly returns of GPK and SON correlate at 0.54, moderate. Recent behaviour matches the longer record: 0.48 over 1 year against 0.54 over 3. Stretching to 5 years gives 0.61, with an annualized covariance of 430.2 %².
Few assets follow GPK as closely as SON, which ranks #2 of 13 tracked partners. The last year tells two different stories: SON led by 74.2 percentage points, -47.7% for GPK against +26.5% for SON.
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.
GPK vs SON: side by side
| GPK (Graphic Packaging Holding Company) | SON (Sonoco Products Company) | |
|---|---|---|
| 1-year return | -47.7% | +26.5% |
| 5-year return | -39.0% | +4.8% |
| Volatility (ann.) | 30.7% | 25.7% |
| Beta vs S&P 500 | 0.71 | 0.62 |
| Max drawdown (3Y) | -69.7% | -32.5% |
| Market cap | $3.4B | $5.6B |
| P/E (trailing) | 17.7 | 8.9 |
| Dividend yield | 3.84% | 3.70% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | GPK | SON |
|---|---|---|
| 2022 | +15.9% | +8.3% |
| 2023 | +12.7% | -4.7% |
| 2024 | +11.7% | -9.1% |
| 2025 | -43.3% | -6.3% |
| 2026 | -23.1% | +33.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are GPK and SON good diversifiers for each other?
Somewhat, no more. With 0.54 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between GPK and SON?
As of 2026-08-27, the correlation of weekly returns between GPK and SON is 0.54 over 3 years, 0.48 over 1 year and 0.61 over 5 years.
Is SON a good diversifier for GPK?
Somewhat, no more. With 0.54 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.54 mean?
On the −1 to +1 scale, 0.54 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: GPK correlations · SON correlations
