NOTICE DATE:  February 22, 2013

NOTICE TYPE:  W-B021513-02 Update: Operations

SHORT DESCRIPTION:  Issue with Day-Ahead Credit Exposure posting

INTENDED AUDIENCE:  ERCOT Counter-Parties

DAY AFFECTED:  February 14 - February 21, 2013

LONG DESCRIPTION:  On February 14, 2013, ERCOT first published the Day-Ahead Market (DAM) Aggregate Credit Exposure report (EMIL ID NP4-411-CD) as a partial implementation of Nodal Protocol Revision Request (NPRR) 407, Credit Monitoring Posting Requirements (formerly "Credit Monitoring Credit Parameters Posting Requirements"). ERCOT detected an issue with the calculation for certain entities, whereby the sum of the credit exposure for each individual transaction type did not equal the total DAM credit exposure.

ERCOT released a fix late on February 21 and this issue has now been corrected.

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]<mailto:[log in to unmask]>.

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