NWN vs POR: Correlation
How closely do Northwest Natural Holding Company (NWN) and Portland General Electric Co (POR) trade together? Their weekly returns over three years give a correlation of 0.71, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NWN and POR?
Across a 3-year window, the weekly returns of NWN and POR correlate at 0.71, strong. Little has changed lately, as the 1-year reading of 0.78 lands near the 3-year figure. Stretching to 5 years gives 0.67, with an annualized covariance of 272.1 %².
Within NWN's tracked universe of 16 assets, POR comes in at #4 by 3-year correlation. Neither side won the trailing year by much: +24.4% 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.
NWN vs POR: side by side
| NWN (Northwest Natural Holding Company) | POR (Portland General Electric Co) | |
|---|---|---|
| 1-year return | +24.4% | +21.0% |
| 5-year return | +20.2% | +20.7% |
| Volatility (ann.) | 20.8% | 18.5% |
| Beta vs S&P 500 | 0.17 | 0.10 |
| Max drawdown (3Y) | -13.5% | -16.3% |
| Market cap | $2.1B | $5.9B |
| P/E (trailing) | 16.9 | 22.2 |
| Dividend yield | 3.91% | 4.24% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NWN | POR |
|---|---|---|
| 2022 | +1.5% | -4.0% |
| 2023 | -14.4% | -7.7% |
| 2024 | +6.8% | +5.3% |
| 2025 | +23.7% | +15.4% |
| 2026 | +9.2% | +6.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NWN and POR good diversifiers for each other?
Only partially. A correlation of 0.71 means NWN and POR share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between NWN and POR?
Using weekly returns as of 2026-08-27: 0.71 over 3 years, with 0.78 over the last year and 0.67 over 5 years.
Is POR a good diversifier for NWN?
Only partially. A correlation of 0.71 means NWN and POR share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.71 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/nwn-vs-por.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/nwn-vs-por/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: NWN correlations · POR correlations
