BKH vs POR: Correlation
Measured on weekly returns over the past three years, Black Hills Corporation (BKH) and Portland General Electric Co (POR) carry a correlation of 0.72, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BKH and POR?
On 3 years of weekly data the BKH/POR correlation comes out at 0.72, strong. Little has changed lately, as the 1-year reading of 0.63 lands near the 3-year figure. The 5-year figure is 0.71, and annualized covariance runs at 285.1 %².
Within BKH's tracked universe of 13 assets, POR comes in at #5 by 3-year correlation. Over the last 12 months BKH came out ahead by 5.5 percentage points (+26.5% against +21.0%).
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.
BKH vs POR: side by side
| BKH (Black Hills Corporation) | POR (Portland General Electric Co) | |
|---|---|---|
| 1-year return | +26.5% | +21.0% |
| 5-year return | +27.4% | +20.7% |
| Volatility (ann.) | 21.5% | 18.5% |
| Beta vs S&P 500 | 0.32 | 0.10 |
| Max drawdown (3Y) | -14.1% | -16.3% |
| Market cap | $5.6B | $5.9B |
| P/E (trailing) | 18.5 | 22.2 |
| Dividend yield | 3.74% | 4.24% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BKH | POR |
|---|---|---|
| 2022 | +3.1% | -4.0% |
| 2023 | -19.9% | -7.7% |
| 2024 | +13.6% | +5.3% |
| 2025 | +23.9% | +15.4% |
| 2026 | +8.8% | +6.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BKH and POR good diversifiers for each other?
Somewhat, no more. With 0.72 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between BKH and POR?
As of 2026-08-27, the correlation of weekly returns between BKH and POR is 0.72 over 3 years, 0.63 over 1 year and 0.71 over 5 years.
Is POR a good diversifier for BKH?
Somewhat, no more. With 0.72 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.72 mean?
On the −1 to +1 scale, 0.72 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.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/bkh-vs-por.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/bkh-vs-por/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: BKH correlations · POR correlations
