Vistra, Constellation Energy start new year atop S&P 500 leaderboard after banner 2024

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lissart/E+ via Getty Images Vistra ( NYSE: VST ) finished the first trading day of the new year as the top gainer on the S&P 500, +8.5% , after racking up a scorching 258% increase for 2024, which made it the year's second strongest S&P performer. Vistra ( VST.