POR vs SPY: Correlation
How closely do Portland General Electric Co (POR) and SPDR S&P 500 ETF Trust (SPY) trade together? Their weekly returns over three years give a correlation of 0.08, which is near-zero.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are POR and SPY?
Over the past 3 years, POR and SPY moved with a correlation of 0.08, which is near zero, meaning they move largely independently. The past 12 months show a weaker link (-0.13) than the 3-year average (0.08). Over 5 years the correlation is 0.26, and the annualized covariance of weekly returns is 20.5 %².
SPY is close to the least connected end of POR's tracked universe, ranking #19 of 23. Neither side won the trailing year by much: +21.0% against +20.6%.
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.
POR vs SPY: side by side
| POR (Portland General Electric Co) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +21.0% | +20.6% |
| 5-year return | +20.7% | +82.4% |
| Volatility (ann.) | 18.5% | 14.5% |
| Beta vs S&P 500 | 0.10 | 1.00 |
| Max drawdown (3Y) | -16.3% | -18.8% |
| Market cap | $5.9B | – |
| P/E (trailing) | 22.2 | – |
| Dividend yield | 4.24% | 1.01% |
| Expense ratio | – | 0.09% |
| Assets under management | – | $795.3B |
| Sector / category | US Listed | ETF · US Large Cap |
SPY is a Large Blend fund from State Street Investment Management: $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | POR | SPY |
|---|---|---|
| 2022 | -4.0% | -18.2% |
| 2023 | -7.7% | +26.2% |
| 2024 | +5.3% | +24.9% |
| 2025 | +15.4% | +17.7% |
| 2026 | +6.1% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are POR and SPY good diversifiers for each other?
Yes. With a correlation of 0.08, POR and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between POR and SPY?
As of 2026-08-27, the correlation of weekly returns between POR and SPY is 0.08 over 3 years, -0.13 over 1 year and 0.26 over 5 years.
Is SPY a good diversifier for POR?
Yes. With a correlation of 0.08, POR and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of 0.08 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.
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Related comparisons
Hubs: POR correlations · SPY correlations
