CPK vs SR: Correlation
Chesapeake Utilities Corporation (CPK) and Spire Inc. (SR) show a strong relationship: their 3-year correlation of weekly returns is 0.70.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CPK and SR?
On 3 years of weekly data the CPK/SR correlation comes out at 0.70, strong. Little has changed lately, as the 1-year reading of 0.67 lands near the 3-year figure. The 5-year figure is 0.70, and annualized covariance runs at 281.4 %².
Few assets follow CPK as closely as SR, which ranks #3 of 11 tracked partners. Their 12-month results are close: +10.1% for CPK against +11.6% for SR.
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.
CPK vs SR: side by side
| CPK (Chesapeake Utilities Corporation) | SR (Spire Inc.) | |
|---|---|---|
| 1-year return | +10.1% | +11.6% |
| 5-year return | +13.6% | +53.3% |
| Volatility (ann.) | 20.5% | 19.6% |
| Beta vs S&P 500 | 0.12 | 0.17 |
| Max drawdown (3Y) | -22.0% | -19.4% |
| Market cap | $3.2B | $4.9B |
| P/E (trailing) | 21.4 | 18.2 |
| Dividend yield | 2.08% | 3.90% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CPK | SR |
|---|---|---|
| 2022 | -17.6% | +9.8% |
| 2023 | -8.8% | -5.3% |
| 2024 | +17.4% | +14.1% |
| 2025 | +5.1% | +27.1% |
| 2026 | +8.1% | +1.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CPK and SR good diversifiers for each other?
To a limited degree. At 0.70 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between CPK and SR?
As of 2026-08-27, the correlation of weekly returns between CPK and SR is 0.70 over 3 years, 0.67 over 1 year and 0.70 over 5 years.
Is SR a good diversifier for CPK?
To a limited degree. At 0.70 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.70 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/cpk-vs-sr.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cpk-vs-sr/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CPK correlations · SR correlations
