NOTICE DATE:  February 15, 2013

NOTICE TYPE:  W-B021513-01Operations

SHORT DESCRIPTION:  Issue with Day-Ahead Credit Exposure posting

INTENDED AUDIENCE:  ERCOT Counter-Parties

DAY AFFECTED:  February 14, 2013-current

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 has detected an issue with the calculation for certain entities, whereby the sum of the credit exposure for each individual transaction type does not equal the total DAM credit exposure. The value in the DAMExposure column is correct. In no case does the magnitude of the discrepancy exceed 1% of the total exposure.

ERCOT plans to release a fix during the first Daylight Savings Time (DST) release, to be implemented in production March 6, 2013.

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]>.

If you are receiving email from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.

















ka