ES vs POR: Correlation
Eversource Energy (ES) and Portland General Electric Co (POR) show a strong relationship: their 3-year correlation of weekly returns is 0.63.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ES and POR?
Over the past 3 years, ES and POR moved with a correlation of 0.63, which is strong. The relationship has been stable: the 1-year correlation (0.55) sits close to the 3-year figure. Over 5 years the correlation is 0.70, and the annualized covariance of weekly returns is 266.4 %².
By 3-year correlation, POR places #7 of the 28 assets tracked against ES. The trailing year gives POR the advantage: +14.5% versus +21.0%, a 6.5-point spread.
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.
ES vs POR: side by side
| ES (Eversource Energy) | POR (Portland General Electric Co) | |
|---|---|---|
| 1-year return | +14.5% | +21.0% |
| 5-year return | -5.0% | +20.7% |
| Volatility (ann.) | 22.9% | 18.5% |
| Beta vs S&P 500 | 0.20 | 0.10 |
| Max drawdown (3Y) | -18.8% | -16.3% |
| Market cap | $26.7B | $5.9B |
| P/E (trailing) | 18.6 | 22.2 |
| Dividend yield | 4.30% | 4.24% |
| Sector / category | Utilities | US Listed |
Year-by-year returns
| Year | ES | POR |
|---|---|---|
| 2022 | -5.1% | -4.0% |
| 2023 | -23.4% | -7.7% |
| 2024 | -2.5% | +5.3% |
| 2025 | +22.9% | +15.4% |
| 2026 | +7.7% | +6.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ES and POR good diversifiers for each other?
Only partially. A correlation of 0.63 means ES 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 ES and POR?
The ES/POR correlation stands at 0.63 on a 3-year window (1 year: 0.55, 5 years: 0.70), computed from weekly returns as of 2026-08-27.
Is POR a good diversifier for ES?
Only partially. A correlation of 0.63 means ES 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 0.63 mean?
On the −1 to +1 scale, 0.63 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/es-vs-por.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/es-vs-por/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ES correlations · POR correlations
