CAISO Extended Day-Ahead Market (EDAM)

NorthWestern Energy
Black Hills-NorthWestern Merger Could Reshape Western Market Map

The proposed merger between Black Hills Corp. and NorthWestern Energy likely will reshape the map in the competition between CAISO’s Extended Day-Ahead Market and SPP’s Markets+ — but it’s still too early to know where new boundaries will be drawn.

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State Tx Entity, Regional Markets Feature in Ore. Energy Strategy
The Oregon Department of Energy’s new draft energy strategy points to the importance of new transmission development and expanding electricity markets for meeting the state's energy goals.
DOE
BPA Supported by Trade Orgs in Suit over Day-ahead Market Decision
Trade organizations for utilities and large energy consumers seek to intervene in the lawsuit filed in the 9th Circuit Court of Appeals challenging the Bonneville Power Administration’s decision to join SPP’s Markets+ instead of CAISO’s EDAM.
Office of Gov. Gavin Newsom
Newsom Reiterates Support for Western Regional Market Push
California Gov. Gavin Newsom again appeared to voice support for the proposed bill that would allow CAISO to relinquish market governance to an independent regional organization, saying the legislation can reduce electricity costs and improve reliability.
CAISO
WEIM Q2 Benefits Exceed $420M, as Total Tops $7.4B
CAISO’s Western Energy Imbalance Market provided participants with $422.44 million in economic benefits during the second quarter of 2025, up 15% compared with the same period year earlier despite no change in membership. 
West-Wide Governance Pathways Initiative
Pathways Initiative Clarifies Near-term Division of Labor with CAISO
The West-Wide Governance Pathways Initiative will run its stakeholder processes separately from CAISO’s until the effort's regional organization is formally launched in 2028, even in areas of overlapping interest.
Colorado PUC
Colorado Commissioners Spar Over PSCo’s Markets+ Choice
Members of the Colorado PUC expressed differing opinions on whether PSCo joining Markets+ would be in the public interest.
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WRAP Task Force Explores Optimization Under Day-ahead Markets
A new task force will examine how the WPP’s WRAP can continue to operate efficiently under the new multimarket environment emerging in the West.
Shutterstock
FERC Proposes to Eliminate Western ‘Soft’ Price Cap
FERC is moving to rescind the West-wide wholesale electricity price cap mechanism it instituted in 2002 in response to widespread price manipulation during the Western energy crisis of 2000/01.
Andre m, CC BY-SA 3.0, via Wikimedia Commons
Calif. Pathways Bill Delayed After Orgs Withdraw Support, While Newsom Signals Backing for Effort
The author behind the bill that would allow CAISO to relinquish market governance to an independent RO has delayed a hearing after several organizations withdrew support for the proposed legislation.

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