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December 5, 2025

CAISO Extended Day-Ahead Market (EDAM)

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FERC Leaders Focused on Stability amid Political Shifts
FERC Chair Mark Christie and Commissioner Judy Chang downplayed the current political environment’s impact on the agency, saying the commission’s role is to follow the law and ensure the fairness of procedures.
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EDAM Congestion Debate Builds Even as CAISO Moves to Address Issue
The dispute over how CAISO’s Extended Day-Ahead Market will allocate congestion revenues to market participants continues, even as the ISO moves to address stakeholder concerns.
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CAISO CEO, Others Point to Reliability Aspect of BPA’s Market Decision
BPA's day-ahead market decision will have “major reliability and affordability impacts” on electricity customers in the Northwest and across the West, CAISO CEO Elliot Mainzer told the ISO’s Board of Governors
Balise42, CC BY-SA-4.0, via Wikimedia Commons
Pathways Inches Closer to Seating RO Board
The West-Wide Governance Pathways Initiative’s Launch Committee said it hopes to seat a permanent board by either next year or 2027 for the regional organization that will govern energy markets in the West.
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WEIM Experience, Reliability Benefit Drove EDAM Decision, BANC Says
For the Balancing Authority of Northern California, a positive experience with CAISO’s Western Energy Imbalance Market was a key factor in the decision to also join the ISO’s Extended Day-Ahead Market.
CAISO
Fast-paced Effort will Address EDAM Congestion Revenue Issue
CAISO launched an “expedited” initiative to address stakeholder concerns about how EDAM will allocate congestion revenues when a transmission constraint in one balancing authority area causes congestion in a neighboring BAA.
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BPA Workshop Leaves Little Room to Probe Markets+ Decision
The Bonneville Power Administration’s first day-ahead markets workshop since issuing the draft policy stating its intention to join SPP’s Markets+ left little opportunity for critics to probe agency officials about the decision.
The Brattle Group
NM Regulators Poke Assumptions Behind EPE’s Markets+ Choice
A recent study that contributed to El Paso Electric’s decision to join SPP’s Markets+ rather than CAISO’s Extended Day-Ahead Market has raised questions among New Mexico regulators.
El Paso Electric
EPE’s Markets+ Decision ‘Not Transparent,’ NM Regulators Say

A New Mexico Public Regulation Commission workshop aimed to restore trust between the commission and El Paso Electric after the utility’s surprise announcement in January that it planned to join SPP’s Markets+.

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BPA Selects SPP Markets+ in Draft Policy
The Bonneville Power Administration announced it intends to join SPP’s Markets+, saying in its draft policy that the day-ahead market “is the best long-term strategic direction for Bonneville, its customers and the Northwest.”

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