Constellation Energy stock tumbles nearly 10% as PJM power-price curbs enter the frame
Constellation Energy shares tumbled 9.8% to close at $307.71 on Friday, marking their steepest single-day decline in months. The selloff hit U.S. power producers tied to PJM following a late-week policy move targeting electricity price controls. Vistra dropped 7.4%, while NRG Energy slipped 4.1%.