DUK vs FTS: Correlation
How closely do Duke Energy (DUK) and Fortis Inc. (FTS) trade together? Their weekly returns over three years give a correlation of 0.72, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are DUK and FTS?
On 3 years of weekly data the DUK/FTS correlation comes out at 0.72, strong. Little has changed lately, as the 1-year reading of 0.81 lands near the 3-year figure. The 5-year figure is 0.75, and annualized covariance runs at 167.9 %².
Among the 53 assets we track against DUK, FTS ranks #15 by 3-year correlation. The trailing year gives FTS the advantage: +1.1% versus +12.4%, a 11.3-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.
DUK vs FTS: side by side
| DUK (Duke Energy) | FTS (Fortis Inc.) | |
|---|---|---|
| 1-year return | +1.1% | +12.4% |
| 5-year return | +39.8% | +43.4% |
| Volatility (ann.) | 15.9% | 14.6% |
| Beta vs S&P 500 | -0.09 | 0.04 |
| Max drawdown (3Y) | -11.6% | -11.6% |
| Market cap | $94.2B | $28.0B |
| P/E (trailing) | 18.3 | 22.5 |
| Dividend yield | 3.49% | 4.58% |
| Sector / category | Utilities | US Listed |
Year-by-year returns
| Year | DUK | FTS |
|---|---|---|
| 2022 | +2.0% | -13.9% |
| 2023 | -1.6% | +7.0% |
| 2024 | +15.6% | +5.4% |
| 2025 | +12.7% | +28.5% |
| 2026 | +5.8% | +8.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DUK and FTS good diversifiers for each other?
Only partially. A correlation of 0.72 means DUK and FTS 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 DUK and FTS?
Using weekly returns as of 2026-08-27: 0.72 over 3 years, with 0.81 over the last year and 0.75 over 5 years.
Is FTS a good diversifier for DUK?
Only partially. A correlation of 0.72 means DUK and FTS share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.72 mean?
A reading of 0.72 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-fts.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/duk-vs-fts/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: DUK correlations · FTS correlations
