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. closed up 3.88% at $166.17 on Dec. 18, after volatile trading and heavy volume. PJM Interconnection’s latest capacity auction cleared at the $333.44/MW-day cap, citing a 6,623 MW reliability shortfall and a sharp demand jump from data centers. Vistra has significant exposure to PJM. After-hours trading showed little movement in VST shares.