NHC vs PRK: Correlation
National HealthCare Corporation (NHC) and Park National Corporation (PRK) show a moderate relationship: their 3-year correlation of weekly returns is 0.55.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NHC and PRK?
Across a 3-year window, the weekly returns of NHC and PRK correlate at 0.55, moderate. Lately the two have drifted apart, with the 1-year correlation at 0.33 versus 0.55 over 3 years. Stretching to 5 years gives 0.48, with an annualized covariance of 466.1 %².
PRK is one of the assets that tracks NHC most closely: it ranks #1 out of the 11 assets we track against NHC. The last year tells two different stories: NHC led by 84.7 percentage points, +101.9% for NHC against +17.2% for PRK.
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.
NHC vs PRK: side by side
| NHC (National HealthCare Corporation) | PRK (Park National Corporation) | |
|---|---|---|
| 1-year return | +101.9% | +17.2% |
| 5-year return | +243.9% | +98.6% |
| Volatility (ann.) | 29.9% | 28.2% |
| Beta vs S&P 500 | 0.50 | 0.78 |
| Max drawdown (3Y) | -33.4% | -30.4% |
| Market cap | $3.5B | $3.6B |
| P/E (trailing) | 25.0 | 17.7 |
| Dividend yield | 1.15% | 2.18% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NHC | PRK |
|---|---|---|
| 2022 | -9.4% | +6.1% |
| 2023 | +60.8% | -2.0% |
| 2024 | +19.0% | +33.0% |
| 2025 | +30.3% | -8.1% |
| 2026 | +63.3% | +32.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NHC and PRK good diversifiers for each other?
Somewhat, no more. With 0.55 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between NHC and PRK?
Using weekly returns as of 2026-08-27: 0.55 over 3 years, with 0.33 over the last year and 0.48 over 5 years.
Is PRK a good diversifier for NHC?
Somewhat, no more. With 0.55 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.55 mean?
A reading of 0.55 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/nhc-vs-prk.json
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Related comparisons
Hubs: NHC correlations · PRK correlations
