Vistra Corp. (VST) Stock Drops at the Close, Then Rebounds After Hours on PJM Auction News — What to Know Before the Market Opens Dec. 18, 2025
Vistra Corp. (NYSE: VST) ended Wednesday, December 17, 2025, with a sharp regular-session selloff — then clawed back some ground in after-hours trading as investors digested a major catalyst tied to U.S. grid capacity pricing. By the closing bell, VST