Constellation Energy Corporation (NASDAQ: CEG) saw its stock edge up just 0.4% over the past week to close at $252.39 on Friday, as preliminary data from the latest PJM capacity auction suggested a more muted earnings boost than some investors had anticipated.
The company secured approximately $2.24 billion in annual gross capacity payments from the PJM auction, with contracts set to begin June 1, 2028. However, nuclear facilities accounted for 83% of the cleared capacity, totaling 15,700 megawatts (MW) out of 18,875 MW awarded at $325 per MW-day. This heavy nuclear weighting may dampen the incremental earnings benefit, as Constellation has indicated that nuclear capacity revenue is included in the federal production tax credit (PTC) gross-receipts test.
According to the company's analysis, investors should not treat this revenue as a direct addition to base earnings. Higher nuclear receipts could reduce tax-credit support before profits see a commensurate rise, altering the expected financial equation. This dynamic effectively means that as nuclear capacity payments increase, the associated tax credit benefits may decline, offsetting potential gains.
Compared to the previous auction, Constellation secured more capacity at a lower price. The current auction cleared 18,475 MW at $333 per MW-day for the 2027/28 planning year, yielding $2.25 billion in preliminary gross payments. For the 2028/29 year, the clearing price dropped to $325 per MW-day, while capacity rose to 18,875 MW, resulting in $2.24 billion—a slight decline of about 0.3% in total annualized gross payments despite adding 400 MW. The increased volume was offset by the lower clearing price.
Non-nuclear generation, including fossil fuels and other sources, posted a gain of 225 MW, pushing preliminary gross payments for that segment up 5% to $377 million. This diversification provides some balance but does not alter the overall picture dominated by nuclear output.
Broader PJM market conditions remain tight. The auction reached its price cap but still fell short of the reliability goal by 6.8 gigawatts. Without the cap, most areas would have settled at $554.72 per MW-day. PJM President David Mills noted that demand continues to outpace electricity supply growth. Spot prices surged past $300 per MWh on Wednesday amid heat-driven scarcity, after trading near $30 earlier in the period.
Among peers, Vistra (NYSE: VST) shares declined 2.2% over the week, while Constellation managed a modest rise, though overall investor enthusiasm appeared subdued. Analysts remain broadly bullish, with FactSet data showing a median price target of $369 for Constellation—a roughly 46% premium to Friday's close.
The primary driver for higher earnings remains long-term nuclear contracts. Constellation reports that 147 million annual MWh are either backed by tax credits or available for new agreements. The company's model suggests $0.40 to $1.00 of annual EPS for each contracted gigawatt, based on a $20-to-$50 premium over the tax-credit floor. However, these figures are presented as scenarios, not formal forecasts.
Traders will be closely watching PJM heat, congestion, and spot prices through the week of July 20. Constellation's next quarterly report is scheduled for August 6. Key risks include potential extension of the price cap, which could constrain scarcity value, as well as downtime or softer spark spreads that might reduce operating leverage.
