NOTICE  DATE: August 24, 2026

NOTICE TYPE: M-A081026-03 Release - Retail/Wholesale

SHORT DESCRIPTION: Implementation of Market-facing changes for August 26, 2026, and August 27, 2026

INTENDED AUDIENCE: All Market Participants

DAYS AFFECTED: August 26, 2026, and August 27, 2026

LONG DESCRIPTION: ERCOT systems may experience intermittent service interruptions during the implementation period. The systems include, but are not limited to:

• Components of the ERCOT Market Information System (MIS), including:
  • Report publishing to the MIS
  • Downloading of extracts and reports from MIS and External Web Services (EWS)
  • ERCOT.com dashboards and displays
• Market Participant Identity Management (MPIM)
• Market submissions and requests via Web Services, Market Manager, and Outage Scheduler
• Net Dependable Capability and Reactive Capability (NDCRC)
• ERCOT Interconnection Services (RIOO) - https://sa.ercot.com/rioo-rs/
• Current Day Report (CDR) report publishing and downloading, which may cause the following reports to be unavailable:
  • SCED and RTD Reports
  • NSA Active and Inactive Constraint Reports
  • State Estimator Reports
  • Real-Time Dynamic Rating Data Reports
  • Wind Power Production - Actual 5-Minute Averaged Values
  • Solar Power Production - Actual 5-Minute Averaged Values
  • SOL Exceedance Report

Information on upcoming releases can be found on the Project Priority List (PPL).

ADDITIONAL INFORMATION: In the event of Settlement Intervals for which the Real-Time Settlement Point Prices are identified as erroneous, and ERCOT sets the SCED intervals as failed in accordance with Section 6.3, Adjustment Period and Real-Time Operations Timeline, then the LMPs, Real-Time MCPCs, Real-Time Reliability Deployment Price Adders for Energy, and Real-Time Reliability Deployment Price Adders for Ancillary Service, for the failed SCED intervals are equal to the LMPs, Real-Time MCPCs, Real-Time Reliability Deployment Price Adders for Energy, and Real-Time Reliability Deployment Price Adders for Ancillary Service, in the most recently solved SCED interval that is not set as failed.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at ClientServices@ercot.com.

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dg