Constellation Energy stock tumbles nearly 10% as PJM power-price curbs enter the frame
New York, Jan 17, 2026, 04:58 EST — Market closed. 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%. The move comes at a tricky time for a trade behind much of the sector’s rally: betting on data centers tightening supply and pushing up wholesale prices for years. Now, a sudden pivot to caps and special procurement auctions pushes investors to weigh political risk alongside