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US · MARKET DESIGN

United States

How the electricity market is organised in United States: the operators and regulator, the markets that apply here, and the developments changing them.

Markets that apply

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US nodal markets operated in this footprint.

Developments

13 tracked developments touching United States.

06 NOV 2026
PJM Market Monitor Doubles Down: Nov. 5 Answer Rebuts NextEra–Dominion Rebuttal, Reiterates Merger Should Be Rejected
Regulatory review · ENERGY MARKETS · United States – PJM Interconnection (Virginia, Pennsylvania, Ohio, Carolinas)
05 NOV 2026
PJM IMM Doubles Down on Sampling Safeguards, Adds CBL-Based Performance Metric Demand in Second Round of FERC Briefing
Regulatory review · ADEQUACY & CAPACITY MARKETS · United States – PJM Interconnection (multi-state RTO: PA, OH, IL, VA, MD, WV, DE, MI, NJ, TN, NC, KY, IN)
18 OCT 2026
PJM Independent Market Monitor Opposes AEP–Longview Section 203 Acquisition Absent Behavioral Market Power Mitigation
Regulatory review · ADEQUACY & CAPACITY MARKETS · United States – PJM Interconnection (APS Zone / PJM West submarket, West Virginia/Pennsylvania/Maryland border area)
14 OCT 2026
PJM IMM Opposes KKR–EDF Section 203 Acquisition Absent Commitment to Keep 938 MW in PJM Markets
Regulatory review · ADEQUACY & CAPACITY MARKETS · United States – PJM Interconnection (OH, IL, PA, and broader multi-state RTO footprint)
09 OCT 2026
PJM's Interim Resource Adequacy Service (IRAS) for Data Center Curtailment Faces IMM Rejection at FERC
Regulatory review · ADEQUACY & CAPACITY MARKETS · United States – PJM Interconnection (multi-state RTO: PA, OH, VA, MD, WV, DE, IL, MI, NJ, TN, NC, KY, IN)
02 OCT 2026
Portland General Electric officially begins participation in CAISO's Extended Day-Ahead Market
Go-live · ENERGY MARKETS · United States – Pacific Northwest / California (Western Interconnection)
02 OCT 2026
PJM Confirms RBP Suspension, Elaborates on FERC's Conditional Acceptance and Eligibility Scope
Decision · ADEQUACY & CAPACITY MARKETS · United States (PJM region)
02 OCT 2026
SPP and CAISO file joint report to FERC on Western market seams coordination framework
Regulatory review · BALANCING MARKETS · United States – Western Interconnection
01 OCT 2026
IMM Backs PaPUC Complaint Challenging PJM's Asymmetric Benefit/Cost Methodology for Market Efficiency Transmission Projects
Regulatory review · ENERGY MARKETS · United States – PJM Interconnection (Pennsylvania, multi-zone regional)
18 SEPT 2026
NV Energy signs agreement to join CAISO's Extended Day-Ahead Market (EDAM), targeting 2028 start
Implementation · ENERGY MARKETS · United States – Western Interconnection (Nevada, California)
15 SEPT 2026
PJM Market Monitor Urges FERC to Reject or Further Scrutinize MARA–Long Ridge Section 203 Deal Over BlackRock/Vanguard Affiliation
Regulatory review · ENERGY MARKETS · United States – PJM Interconnection (Ohio, AEP Zone)
11 SEPT 2026
PJM Files Interim Resource Adequacy Service (IRAS) Framework for Large Load Data Center Integration
Proposal · ADEQUACY & CAPACITY MARKETS · United States (PJM region)
11 SEPT 2026