The charts for nuclear power plays Vistra and Constellation Energy suffered notable setbacks this week, leading the losses on the S&P 500 on Wednesday. Vistra recently leapt past Nvidia, taking the mantle of “new king” as the S&P 500’s top gaining stock this year. Vistra fell 2.9% to 124.20 during Wednesday’s market action. CEG tumbled 6.1% to 262.28.