NOTICE DATE: October 14, 2020

NOTICE TYPE: M-A082720-02 Operations

SHORT DESCRIPTION: ERCOT Board approval of Day-Ahead Market (DAM) price corrections for Operating Days (ODs) August 20, 21, and 23, 2020

INTENDED AUDIENCE: All Market Participants

DAYS AFFECTED: August 20, 21, and 23, 2020

LONG DESCRIPTION: On August 27, 2020, ERCOT informed Market Participants that DAM prices for ODs August 20, 21, and 23, 2020, were impacted by an internal data input error related to the modelling of a Remedial Action Scheme (RAS) in the DAM. ERCOT also notified Market Participants that ERCOT would be seeking ERCOT Board of Directors (Board) review of Day-Ahead Settlement Point Prices (DASPPs), DAM Market Clearing Prices for Capacity (MCPCs), and DAM Locational Marginal Prices (LMPs) for those ODs. See Market Notice M-A082720-01.

On October 13, 2020, the Board reviewed DASPPs, DAM MCPCs, and DAM LMPs for ODs August 20, 21, and 23, 2020; determined that these prices were significantly affected by an internal data error; and directed ERCOT to implement the appropriate price corrections pursuant to ERCOT Protocol Section 4.5.3(5). See Urgent Board of Directors Meeting (October 13, 2020), Agenda Item 7.2.

Board approval of these price corrections necessitate the issuance of DAM Resettlement Statements. A Market Notice will be posted for each DAM resettlement in accordance with ERCOT Protocol Section 9.2.6.

ADDITIONAL INFORMATION: The corrected prices will be posted in both CSV and XML formats in the DAM Price Corrections folder located on the Market Prices on ERCOT.com.

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 [log in to unmask].

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