Vistra Energy Corp. (VST) experienced a significant intraday surge of 7.51% on Wednesday, outperforming the broader market.

The stock's sharp rise followed an announcement from the PJM Interconnection, the grid network serving the Midwest and Mid-Atlantic regions, that it will hold an auction this September to allow power producers to sell electricity from new plants to data centers. This timeline is materially sooner than the previously scheduled date of September 2027, providing much-needed clarity on a key regulatory issue.

Analysts noted the auction is expected to be a "materially constructive" event for Vistra and other power producers, clearing regulatory uncertainty that had stalled lucrative data-center agreements. The companies' stocks had languished this year due to the lack of clear rules governing how they can sell power to tech companies for their data centers, with some seeing double-digit declines.