IDA vs PCG: Correlation
IDACORP, Inc. (IDA) and PG&E Corporation (PCG) show a moderate relationship: their 3-year correlation of weekly returns is 0.51.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IDA and PCG?
Across a 3-year window, the weekly returns of IDA and PCG correlate at 0.51, moderate. The relationship has been stable: the 1-year correlation (0.59) sits close to the 3-year figure. Stretching to 5 years gives 0.37, with an annualized covariance of 224.4 %².
Among the 18 assets we track against IDA, PCG ranks #10 by 3-year correlation. The trailing year gives PCG the advantage: +11.6% versus +20.3%, a 8.7-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.
IDA vs PCG: side by side
| IDA (IDACORP, Inc.) | PCG (PG&E Corporation) | |
|---|---|---|
| 1-year return | +11.6% | +20.3% |
| 5-year return | +51.7% | +102.7% |
| Volatility (ann.) | 17.8% | 24.7% |
| Beta vs S&P 500 | 0.10 | 0.24 |
| Max drawdown (3Y) | -13.6% | -39.6% |
| Market cap | $8.0B | $39.5B |
| P/E (trailing) | 22.9 | 12.9 |
| Dividend yield | 2.53% | 0.96% |
| Sector / category | US Listed | Utilities |
Year-by-year returns
| Year | IDA | PCG |
|---|---|---|
| 2022 | -2.1% | +33.9% |
| 2023 | -6.0% | +10.9% |
| 2024 | +15.0% | +12.3% |
| 2025 | +19.2% | -19.7% |
| 2026 | +10.9% | +12.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IDA and PCG good diversifiers for each other?
To a limited degree. At 0.51 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 IDA and PCG?
Using weekly returns as of 2026-08-27: 0.51 over 3 years, with 0.59 over the last year and 0.37 over 5 years.
Is PCG a good diversifier for IDA?
To a limited degree. At 0.51 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 0.51 mean?
On the −1 to +1 scale, 0.51 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/ida-vs-pcg.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/ida-vs-pcg/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: IDA correlations · PCG correlations
