Settlement Stability2015 Q3 Update to COPS

Austin J. RoselERCOT

COPS10/14/2015

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8.2(c)(i) Track number of price changes

Notes:

Reporting Period: 2015 Q3

Operating Day

# of Corrected Settlement Point Prices # of Intervals Affected

DASPP RTSPP RTRMPRORDC Adders

DASPP RTSPP RTRMPRORDC Adders

6/4/2015 - 1206 982 4 - 2 2 2

6/6/2015 - 7236 5892 12 - 12 12 12

6/7/2015 - 11457 9329 29 - 19 19 19

6/8/2015 - 15075 12275 40 - 25 25 25

6/9/2015 - 7236 5892 21 - 12 12 12

6/10/2015 - 10854 8838 29 - 18 18 18

6/11/2015 - 8442 6874 24 - 14 14 14

6/12/2015 - 12663 10311 25 - 21 21 21

6/13/2015 - 19296 15712 45 - 32 32 32

6/14/2015 - 3618 2946 6 - 6 6 6

6/15/2015 - 18693 15221 55 - 31 31 31

7/31/2015 14 - - - 14 - - -

8/5/2015 - 1211 963 - - 3 3 -

Notes:

• Price corrections for OD between 06/04/2015 and 06/23/2015 due to data error (mean and standard deviation). Approved for Resettlement at 8/11/2015 Board. The remaining corrections (6/16-19,6/23) will be executed in Q4.

• Price corrections for OD 7/31/2015 corrected HE1-14 for PENA_ALL Settlement Point.

• Price corrections for OD 8/5/2015 were due to a system issue.

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8.2(c)(ii) Track number and types of disputes submitted

YEAR 2015

QUARTER Q1-Q3

Row Labels Denied GrantedGranted w/Exc. Open

Total Submitted

Congestion Revenue Rights-RTM 1 3 4

Energy-DAM 1 1

Energy-RTM 15 9 24Emergency Operations-RTM 9 7 1 17

Ancillary Services-RTM 3 1 4

Grand Total 29 16 1 4 50

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8.2(c)(iii) Compliance with timeliness of response to disputes

YEAR 2015  QUARTER Q1-Q3

Row Labels Final TRUE-UPGrand Total

Congestion Revenue Rights-RTM 100% 100%

Energy-DAM 100% 100%

Energy-RTM 100% 100% 100%Emergency Operations-RTM 100% 100%Ancillary Services-RTM 100% 100%

Grand Total 100% 100% 100%

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8.2(c)(iv) Other Settlement metrics

NOTE: ERS Final settlement OD data is not represented in graph.

Average percent change per year

Year Final True Up

2011 3.65% 0.42%

2012 2.56% 0.41%

2013 2.83% 0.34%

2014 3.18% 0.32%

2015 2.92% 0.17%

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8.2(c)(iv) Other Settlement metrics

NOTE: “Total of Charges” represents the sum of statements that are a net charge to the Market Participant (i.e., the amount due to ERCOT)

2011 2012 2013 2014 2015Q1-Q3

AVERAGE$7.06 $4.29 $5.41 $6.46 $4.79

MEDIAN$3.85 $3.67 $5.11 $5.66 $4.20

MIN$1.81 $1.70 $2.96 $1.96 $1.86

MAX$108.69 $26.21 $19.45 $47.93 $42.34

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8.2(c)(iv) Other Settlement metrics

NOTE: “Total of Charges” represents the sum of statements that are a net charge to the Market Participant (i.e., the amount due to ERCOT)

2011 2012 2013 2014 2015Q1-Q3

AVERAGE$7.19 $5.19 $6.61 $8.21 $6.14

MEDIAN$4.69 $4.51 $5.97 $7.15 $5.13

MIN$2.38 $2.34 $2.98 $3.32 $2.90

MAX$173.66 $63.34 $40.52 $123.68 $33.61

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8.2(c)(v) Availability of ESIID consumption data

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8.2(c)(v) Availability of ESIID consumption data

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8.2(c)(v) Availability of ESIID consumption data

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8.2(c)(v) Availability of ESIID consumption data

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8.2(c)(v) Availability of ESIID consumption data

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8.2(c)(v) Availability of ESIID consumption data

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8.2(g) Net Allocation to Load

Aug-14 Sep-14 Oct-14 Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15

Total Auction Distribution -$44.22 -$35.10 -$30.75 -$22.51 -$25.09 -$22.65 -$21.25 -$25.37 -$31.61 -$34.48 -$35.57 -$38.03 -$36.98 -$31.14Balancing Account Payout to Load -$9.30 -$0.97 -$1.00 -$2.27 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 -$4.33 -$5.58 -$3.45RUC Settlement -0.01 $0.00 -$0.06 -$0.12 $0.00 -$0.02 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 -$0.17Ancillary Services Settlement $42.68 $25.76 $41.11 $44.68 $21.59 $17.58 $19.26 $33.60 $31.90 $26.10 $25.02 $39.91 $89.07 $18.55Black Start Service Settlement $0.60 $0.59 $0.61 $0.60 $0.63 $0.62 $0.56 $0.63 $0.61 $0.63 $0.61 $0.63 $0.63 $0.61Voltage Services Settlement $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00RMR Settlement $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00RMR Capacity $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00Revenue Neutrality Total $3.72 $8.19 $1.21 $2.02 $0.48 $2.73 $0.22 $2.01 $0.98 $2.36 $2.62 $2.74 $0.03 $4.74Emergency Energy Charges $0.11 $0.39 $0.34 $0.20 $0.10 $0.03 $0.08 $0.08 $0.06 $0.07 $0.04 $0.04 $0.12 $0.05Base Point Deviation Payments -$0.33 -$0.29 -$0.34 -$0.23 -$0.23 -$0.24 -$0.34 -$0.21 -$0.18 -$0.24 -$0.24 -$0.26 -$0.26 -$0.21ORDC Settlement $0.20 $0.05 $0.08 $0.04 $0.07 $0.05 $0.18 $0.30 $0.34 $0.20 $0.09 -$0.42 -$0.85 $0.33ERCOT Admin Fee Settlement $16.74 $14.48 $12.83 $11.51 $12.09 $13.43 $11.70 $11.81 $11.49 $13.01 $15.09 $17.22 $17.19 $14.95Block Load Transfer Settlement $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 -$0.10 -$0.06 $0.00ERS Settlement $0.00 $0.00 $19.46 $0.00 $0.00 $0.00 $14.69 $0.00 $0.00 $0.00 $14.24 $0.00 $0.00 $0.00MW Charge for Excep. Fuel Cost $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00Net Allocation to Load $10.2 $13.1 $43.5 $33.9 $9.6 $11.5 $25.1 $22.9 $13.6 $7.7 $21.9 $17.4 $63.3 $4.3

NET ALLOCATION TO LOAD ($ in Mil)