Why Constellation Energy Tanked Today

Core Viewpoint - Shares of Constellation Energy fell 9.7% amid new regulatory developments that may limit pricing power for existing power generation assets [1][2] Group 1: Market Performance - Constellation Energy's stock had previously surged nearly 58% in 2025 due to increased electricity demand from AI data centers, benefiting from its nuclear power plant capacity [1] - The stock's recent decline reflects concerns over new regulatory measures that could impact revenue generation from existing power sources [1][2] Group 2: Regulatory Developments - The Trump Administration, along with local governors in the Mid-Atlantic PJM utility grid regions, announced a "statement of principles" that may complicate utilities' ability to charge higher rates for existing power generation [2][3] - The new plan involves large tech companies bidding for 15-year contracts to support the construction of new power plants, which could help address the undersupply in the PJM region [5][7] - While the plan aims to facilitate new construction, it may also impose price caps on existing power sources, potentially limiting profitability for companies like Constellation [5][8] Group 3: Company Positioning - Constellation derives approximately 69% of its power generation revenue from the PJM region, which will decrease following its acquisition of Calpine, but the PJM market will still represent 49% of the combined company's revenues [4] - The PJM region is currently undersupplied by about six gigawatts, equivalent to six nuclear power plants, indicating a need for new capacity [5]