Group 1 - Jefferies downgraded Vistra Energy's rating from "Buy" to "Hold" and reduced the target price from $241 to $230 due to concerns over the lack of announcements regarding the Comanche Peak nuclear power plant data center deal [1] - Analyst Julien Dumoulin-Smith noted that the current stock price reflects a 100% probability for the Comanche nuclear contract price at $100 per megawatt-hour and a 75% probability for the PJM nuclear asset contract price at $88 per megawatt-hour [1] - The analyst expressed optimism about Vistra's power business but highlighted increasing political risks in Texas and PJM, along with surprise at the lack of related transactions by independent power producers [1] Group 2 - Dumoulin-Smith mentioned that potential issues related to processes are affecting confidence in Vistra's ability to complete the Comanche project and other transactions in a timely manner [2] - As of Tuesday's market close, Vistra's stock fell by 6.28% to $204.24, despite a year-to-date increase of 49% [2]