The ISO Market Edge Newsletter

Stay in-the-know about power market changes, delivered to your inbox.

Key market changes in the ISO/RTO power markets:

  • Technical or operational insights that impact market participants

  • Commentary from subject-matter experts within Hartigen's team

  • Analysis to help market participants stay ahead of trends and developments in energy market operations

  • Understanding of market shifts, initiatives, and operational or regulatory developments

  • Relevant updates and enhancements to the PowerOptix platform

CAISO, EDAM, DAME, WEIM Katie Zautke CAISO, EDAM, DAME, WEIM Katie Zautke

CAISO’s EDAM & DAME: What’s Next, Who’s In, and What You Need to Know

As the California Independent System Operator (CAISO) finalizes preparations for one of the most significant wholesale market transformations in a generation, market participants across the Western United States are preparing for EDAM (Extended Day-Ahead Market) and DAME (Day-Ahead Market Enhancements).

Building on the foundational overview from our first ISO Market Edge Newsletter edition, this update provides deeper insight into upcoming milestones, market participants, timelines, participant readiness expectations, and strategic actions.

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CAISO, EDAM, DAME, WEIM Katie Zautke CAISO, EDAM, DAME, WEIM Katie Zautke

CAISO's EDAM & DAME Initiatives

Launching May 1, 2026, EDAM expands day-ahead market participation across the Western Energy Imbalance Market, enabling greater regional coordination, improved reliability, and more efficient resource optimization. Complementing this, DAME enhances CAISO’s internal market design by introducing new reserve and reliability products to better manage uncertainty and grid variability. Together, these reforms support a more integrated, resilient, and cost-effective Western power system.

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