Vistra is trading higher in extended hours following a wave of positive sentiment surrounding the nuclear power sector and the company's strategic positioning. The move follows recent industry developments, including Constellation Energy's announcement of a 20-year power purchase agreement with Amazon and Talen Energy's launch of a $1.5 billion accelerated share repurchase program. These events have reinforced investor focus on Vistra's own 6.6 GW of nuclear capacity and its long-term contracts with Meta, which analysts view as key drivers for revenue visibility and growth in the AI infrastructure space.