FIX vs NRG: Correlation
How closely do Comfort Systems USA (FIX) and NRG Energy (NRG) trade together? Their weekly returns over three years give a correlation of 0.51, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FIX and NRG?
Across a 3-year window, the weekly returns of FIX and NRG correlate at 0.51, moderate. The link has loosened recently: the 1-year correlation (0.41) runs below the 3-year figure (0.51). Stretching to 5 years gives 0.47, with an annualized covariance of 1083.0 %².
Within FIX's tracked universe of 37 assets, NRG comes in at #21 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months FIX outperformed by 149.8 percentage points (+128.0% for FIX against -21.8% for NRG). Do not treat this figure as fixed: across three years the rolling one-year correlation ranged all the way from 0.07 to 0.72.
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.
FIX vs NRG: side by side
| FIX (Comfort Systems USA) | NRG (NRG Energy) | |
|---|---|---|
| 1-year return | +128.0% | -21.8% |
| 5-year return | +2077.9% | +191.5% |
| Volatility (ann.) | 47.4% | 44.4% |
| Beta vs S&P 500 | 1.74 | 1.30 |
| Max drawdown (3Y) | -46.0% | -38.9% |
| Market cap | $56.8B | $24.1B |
| P/E (trailing) | 39.8 | 30.2 |
| Dividend yield | 0.16% | 1.61% |
| Sector / category | Industrials | Utilities |
Year-by-year returns
| Year | FIX | NRG |
|---|---|---|
| 2022 | +17.0% | -23.5% |
| 2023 | +79.6% | +69.4% |
| 2024 | +106.9% | +78.6% |
| 2025 | +120.9% | +78.9% |
| 2026 | +73.3% | -27.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FIX and NRG 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 FIX and NRG?
Using weekly returns as of 2026-08-27: 0.51 over 3 years, with 0.41 over the last year and 0.47 over 5 years.
Is NRG a good diversifier for FIX?
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/fix-vs-nrg.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/fix-vs-nrg/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: FIX correlations · NRG correlations
