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
NYISO Bidding Upload Download (BUD) Modernization
NYISO’s transition to the new Bidding Upload Download (BUD) system has officially moved from planning to execution. With the platform now live in both Production and Sandbox environments, market participants are entering an active migration phase that will extend through the retirement of the legacy system in Q1 2027.
This modernization effort, outlined in Technical Bulletin 267 and reinforced in recent NYISO Markets Report updates, represents a structural change in how participants submit bids and retrieve market data.
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.
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.
SPP’s RTO Expansion: A Major Milestone for U.S. Power Markets
The Southwest Power Pool (SPP) is preparing for one of the most significant market expansions in North America. On April 1, 2026, most participants in the Western Energy Imbalance Service will transition into SPP’s Integrated Marketplace, gaining full regional transmission organization (RTO) services and broader market access. This expansion positions SPP as the first U.S. RTO to operate across both the Eastern and Western Interconnections, enabling more coordinated operations, enhanced reliability, and long-term economic efficiencies across a larger regional footprint.