EME vs VST: Correlation
Measured on weekly returns over the past three years, Emcor (EME) and Vistra Corp. (VST) carry a correlation of 0.55, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are EME and VST?
Over the past 3 years, EME and VST moved with a correlation of 0.55, which is moderate. Lately the two have drifted apart, with the 1-year correlation at 0.13 versus 0.55 over 3 years. Over 5 years the correlation is 0.48, and the annualized covariance of weekly returns is 1007.6 %².
By 3-year correlation, VST places #18 of the 34 assets tracked against EME. Correlation aside, the last 12 months split them widely, with EME ahead by 52.3 points (+24.5% versus -27.8%). The relationship is regime-dependent: the rolling one-year correlation swung between -0.13 and 0.73 over the past three years, so this pair behaves very differently depending on the market environment. Risk is not evenly split, since VST carries 1.5 times the volatility of the other side.
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.
EME vs VST: side by side
| EME (Emcor) | VST (Vistra Corp.) | |
|---|---|---|
| 1-year return | +24.5% | -27.8% |
| 5-year return | +540.3% | +713.7% |
| Volatility (ann.) | 34.9% | 52.8% |
| Beta vs S&P 500 | 1.31 | 1.62 |
| Max drawdown (3Y) | -36.2% | -48.8% |
| Market cap | $34.2B | $46.9B |
| P/E (trailing) | 23.8 | 23.6 |
| Dividend yield | 0.09% | 0.65% |
| Sector / category | Industrials | Utilities |
Year-by-year returns
| Year | EME | VST |
|---|---|---|
| 2022 | +16.8% | +5.1% |
| 2023 | +46.0% | +70.7% |
| 2024 | +111.3% | +261.5% |
| 2025 | +35.1% | +17.7% |
| 2026 | +26.9% | -13.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are EME and VST good diversifiers for each other?
Somewhat, no more. With 0.55 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between EME and VST?
Using weekly returns as of 2026-08-27: 0.55 over 3 years, with 0.13 over the last year and 0.48 over 5 years.
Is VST a good diversifier for EME?
Somewhat, no more. With 0.55 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.55 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
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Related comparisons
Hubs: EME correlations · VST correlations
