EXC vs SO: Correlation
Exelon (EXC) and Southern Company (SO) show a strong relationship: their 3-year correlation of weekly returns is 0.76.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are EXC and SO?
Over the past 3 years, EXC and SO moved with a correlation of 0.76, which is strong. The relationship has been stable: the 1-year correlation (0.85) sits close to the 3-year figure. Over 5 years the correlation is 0.77, and the annualized covariance of weekly returns is 244.2 %².
By 3-year correlation, SO places #5 of the 41 assets tracked against EXC. Neither side won the trailing year by much: +1.7% against -1.4%. Stability stands out here, with the rolling one-year correlation confined to 0.62 through 0.84.
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.
EXC vs SO: side by side
| EXC (Exelon) | SO (Southern Company) | |
|---|---|---|
| 1-year return | +1.7% | -1.4% |
| 5-year return | +48.1% | +62.6% |
| Volatility (ann.) | 19.4% | 16.5% |
| Beta vs S&P 500 | -0.05 | -0.02 |
| Max drawdown (3Y) | -18.9% | -15.0% |
| Market cap | $45.3B | $102.4B |
| P/E (trailing) | 16.3 | 21.7 |
| Dividend yield | 3.69% | 3.32% |
| Sector / category | Utilities | Utilities |
Year-by-year returns
| Year | EXC | SO |
|---|---|---|
| 2022 | +8.3% | +8.2% |
| 2023 | -14.0% | +2.2% |
| 2024 | +9.2% | +21.7% |
| 2025 | +20.0% | +9.5% |
| 2026 | +2.7% | +4.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are EXC and SO good diversifiers for each other?
To a limited degree. At 0.76 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between EXC and SO?
Using weekly returns as of 2026-08-27: 0.76 over 3 years, with 0.85 over the last year and 0.77 over 5 years.
Is SO a good diversifier for EXC?
To a limited degree. At 0.76 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
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/exc-vs-so.json
Embed this badge (it refreshes with the data), with attribution:
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Related comparisons
Hubs: EXC correlations · SO correlations
