Fri, Sep 03, 2021 10:42 AM

M-B082621-02 Implementation of NPRR1078 Collateral Requirements

NOTICE DATE:  September 3, 2021

NOTICE TYPE:  M-B082621-02 Financial/Credit

SHORT DESCRIPTION: Implementation of NPRR1078 Collateral Requirements


DAY AFFECTED:  September 8, 2021

LONG DESCRIPTION:  As communicated in Market Notice M-B082621-01, on August 20, 2021, Nodal Protocol Revision Request (NPRR) 1078, Clarification of Default Uplift, became effective. NPRR1078 clarifies the definition of Potential Uplift (PUL) within the calculation of a Counter-Party’s “Total Potential Exposure Any” (TPEA). The PUL component of the TPEA calculation will be revised in accordance with NPRR1078 on September 8, 2021.

The revised PUL will be calculated based on True-Up Settlement data. Counter-Parties can review the Default Uplift Supporting Data report (EMIL ID: NP9-194-M, Report Type ID: 19306)  posted on August 27, 2021, for Operating Month February 2021 to view their True-Up Maximum MWh Activity Ratio Share (MMARS). Counter-Parties can also review the Total Potential Exposure (TPE) Summary Report (EMIL ID: NP16-664-SG, Report Type ID: 11174) on September 8, 2021, to view the PUL revisions. A Digital Certificate is required to access the MIS Secure Area.

ADDITIONAL INFORMATION: NPRR1078 and associated documents can be found on the ERCOT website.  

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

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