DUK vs EXC: Correlation
How closely do Duke Energy (DUK) and Exelon (EXC) trade together? Their weekly returns over three years give a correlation of 0.76, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are DUK and EXC?
Over the past 3 years, DUK and EXC moved with a correlation of 0.76, which is strong. The past 12 months show a tighter link (0.92) than the 3-year average (0.76). Over 5 years the correlation is 0.78, and the annualized covariance of weekly returns is 234.2 %².
Among the 53 assets we track against DUK, EXC ranks #10 by 3-year correlation. Twelve-month performance is nearly a tie, at +1.1% for DUK and +1.7% for EXC. The rolling one-year correlation moved between 0.56 and 0.92 over the past three years, a moderate range.
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.
DUK vs EXC: side by side
| DUK (Duke Energy) | EXC (Exelon) | |
|---|---|---|
| 1-year return | +1.1% | +1.7% |
| 5-year return | +39.8% | +48.1% |
| Volatility (ann.) | 15.9% | 19.4% |
| Beta vs S&P 500 | -0.09 | -0.05 |
| Max drawdown (3Y) | -11.6% | -18.9% |
| Market cap | $94.2B | $45.3B |
| P/E (trailing) | 18.3 | 16.3 |
| Dividend yield | 3.49% | 3.69% |
| Sector / category | Utilities | Utilities |
Year-by-year returns
| Year | DUK | EXC |
|---|---|---|
| 2022 | +2.0% | +8.3% |
| 2023 | -1.6% | -14.0% |
| 2024 | +15.6% | +9.2% |
| 2025 | +12.7% | +20.0% |
| 2026 | +5.8% | +2.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DUK and EXC good diversifiers for each other?
Somewhat, no more. With 0.76 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between DUK and EXC?
Using weekly returns as of 2026-08-27: 0.76 over 3 years, with 0.92 over the last year and 0.78 over 5 years.
Is EXC a good diversifier for DUK?
Somewhat, no more. With 0.76 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.76 mean?
A reading of 0.76 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/duk-vs-exc.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/duk-vs-exc/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: DUK correlations · EXC correlations
