That’s given dealmaking a boost. Last week, NRG Energy Inc. agreed to pay $12 billion, including debt, for assets with a generating capacity of 13 gigawatts, and Vistra Corp. announced a $1.9 billion acquisition for 2.6 gigawatts of gas-fire power plants. Nuclear plant owner Constellation Energy Corp. agreed in January to acquire closely held Calpine Corp. for $16.4 billion.
