Vistra Energy Corp. has entered into an agreement to acquire Crius Energy Trust for about $328 million, the company announced in a news release Thursday. The move comes as Irving-based Vistra (NYSE: VST) seeks to expand its retail business. With the acquisition of Crius Energy, Vistra would serve 19 states and the District of Columbia in the electricity and natural gas product market for residential and small business customers. Vistra plans to fund the deal with cash on-hand, in addition to taking...