NOTICE DATE: March 25, 2026

NOTICE TYPE: M-C032526-01 Operations

SHORT DESCRIPTION: Incorrect Mitigated Offer Curves in the Real-Time Market due to Incorrect Verifiable Cost Data

INTENDED AUDIENCE: All Market Participants

DAYS AFFECTED: February 1, 2026 to March 1, 2026

LONG DESCRIPTION: ERCOT identified incorrect Verifiable Cost data for some Resources during Operating Days (ODs) February 1 - March 1, 2026. Fuel adder data was not updated in the Verifiable Cost calculations, resulting in incorrect Mitigated Offer Curves for some resources. We resolved the issue on March 2, 2026.

We cannot accurately recreate the necessary input data to recalculate the affected Mitigated Offer Curves for ODs February 1 - March 1, 2026. Therefore, we cannot correct prices for those ODs.

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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