The transition from 2025 to 2026 was characterized by a shift toward implementing multi-year regulatory reforms and finalizing resource adequacy standards across North American wholesale markets. While real-time prices remained relatively stable due to moderate holiday temperatures and lower industrial loads, the week saw the start of new 2026 transmission planning cycles and the adoption of updated ancillary service methodologies. System operators focused on the tightening supply-demand balance, primarily driven by the faster integration of high-load data centers and the decommissioning of older thermal units.

Market structures in the West made significant progress as CAISO's Extended Day-Ahead Market and SPP's Markets+ improved their governance frameworks and participant commitments. At the same time, Eastern RTOs like PJM and MISO faced the aftermath of record-high capacity auction results and the need for faster interconnection queue reforms as the new year began. As the industry heads into the first quarter of 2026, the main challenge remains balancing long-term decarbonization goals with the immediate need to keep the grid stable during peak winter volatility.