 Shares of Constellation Energy Corp. CEG, 15.83 charged up 15.9 in afternoon trading Thursday, enough to pace the SP 500s SPX, 1.25 gainers, in the wake of an agreement on the Democrats spending bill, that includes 369 million in climate change-fighting spending. Constellation Energy, which separated from Exelon Corp. EXC, 3.16 on Feb. 1, boasts that it is the U.S.s largest producer of carbon-free energy. 