Vistra Corp. Stock After Hours: VST Rebounds on PJM Capacity Windfall and a New FERC Data-Center Push — What to Know Before the Market Opens Dec. 19, 2025
Vistra Corp. (NYSE: VST) closed higher on Thursday, Dec. 18, 2025, stabilizing after a sharp, headline-driven stretch for U.S. power producers tied to the AI data-center electricity boom. By the closing bell, VST finished at $166.17, up $6.20 (+3.88%), after swinging between $162.79 and $171.92 on roughly 7.6 million shares. Yahoo Finance In after-hours trading, Vistra shares were little changed, with quotes hovering around $166 early in the extended session (and modest after-hours volume reported). MarketWatch The big story behind today’s action isn’t a single Vistra earnings headline—it’s the growing set of policy and market signals indicating that power markets