Did The Market Read Vistra Stock Right?

Vistra (VST) stock fell 6.5% on Wednesday, October 14, 2026, compared with a 1.1% loss for the S&P 500. The company had not reported results since its August 7 earnings call. The move followed a week of sharp swings in both directions for the shares. So is a one-day fall of this size unusual for Vistra.