1. JUNE 18, 2012 CSWG CRR AUCTION RESULTS FORMAT ISSUE FOR DISCUSSION AUSTIN ENERGY 1

2. CRR MONTHLY & ANNUAL AUCTION FILES Each CRR has a unique ID CRRs can be broken up & offered for sale CRRs awarded to sale have only a ORI_CRR_ID CRRs awarded to buy have only a CRR_ID When sold a CRR can be broken into multiple offers Each bid has the same ORI_CRR_ID as the original CRR_ID before the split There is no way to tell if the identical ORI_CRR_IDs are due to a system error with the information ERCOT is providing Items for discussion: Did other Market Participant also notice this as an issue? What solutions are possible? 2

3. EXAMPLE CRR_IDORI_CRR_IDMWPRICEBUY/SELLQSE N/A12341$5SELLXYZ N/A12341$5SELLXYZ 1235N/A1$5BUYABC 1236N/A1$5BUYABC 3