Appendix Tables Table A1: Description of special items Q2 07 and Q2 06; $ millions and $ per share after tax Income Statement Special Item Line Q2 07 Q2 07 Q2 06 Q2 06 Competitive Electric Segment: "Day one" losses on long-term hedges Revenues 40 0.09 71 0.15 Positions marked to market (gain)/loss(6) Revenues 261 0.56 (89) (0.19) Generation development Other charges deductions 54 0.11 - - Regulatory Other settlement deductions 3 0.01 - - Gas plant Other impairment(8) deductions - - 131 0.28 Texas margin tax deferred tax (credit)/charge Income tax (31) (0.07) 41 0.09 Regulated Delivery Segment: Projects Other expenses(9) deductions 2 0.01 - - Re-branding Other expenses deductions 2 - - - Corporate and other: Projects Other expenses(9) deductions 9 0.02 - - Texas margin tax deferred tax (credit)/charge Income tax (20) (0.04) (1) - Total 320 0.69 153 0.33 Table A2: Description of special items YTD 07 and YTD 06; $ millions and $ per share after tax Income Statement Special Item Line YTD 07 YTD 07 YTD 06 YTD 06 Competitive Electric Segment: "Day one" losses on long-term hedges Revenues 103 0.22 71 0.15 Positions marked to market (gain)/loss(6) Revenues 647 1.41 (76) (0.16) Generation development Other charges(7) deductions 517 1.13 - - Regulatory Other settlement deductions 3 0.01 - - Gas plant Other impairment(8) deductions - - 131 0.28 Texas margin tax deferred tax (credit)/charge Income tax (31) (0.07) 41 0.08 Regulated Delivery Segment: Projects Other expenses(9) deductions 2 0.01 - - Re-branding Other expenses deductions 2 - - - Corporate and other: Projects Other expenses(9) deductions 38 0.08 - - Texas margin tax deferred tax (credit)/charge Income tax (20) (0.04) (1) - Total 1,261 2.75 166 0.35 Appendix Table B: Competitive Electric Segment -- operating revenues Q2 07 vs. Q2 06 and YTD 07 vs. YTD 06; $ millions and mixed measures Operating Revenue % % Component Q2 07 Q2 06 Change YTD 07 YTD 06 Change Retail electricity revenues: Native market: Residential 700 1,008 (30.6) 1,484 1,753 (15.3) Small business 230 309 (25.6) 468 566 (17.3) Total native market 930 1,317 (29.4) 1,952 2,319 (15.8) Other markets: Residential 141 160 (11.9) 249 248 0.4 Small business 26 20 30.0 46 36 27.8 Total other markets 167 180 (7.2) 295 284 3.9 Large business 343 339 1.2 657 655 0.3 Total retail electricity revenues 1,440 1,836 (21.6) 2,904 3,258 (10.9) Wholesale electricity revenues(10) 535 447 19.7 991 982 0.9 Risk management and trading activities:(11) Realized net gains (losses) on settled positions(12) 35 (38) - 113 (86) - Reversal of prior unrealized net (gains)/losses (21) 2 - (13) 38 - Other unrealized net gains/(losses) (397) 23 - (1,169) (9) - Net risk management and trading activities (383) (13) - (1,069) (57) - Other revenues 74 79 (6.3) 157 176 (10.8) Total operating revenues 1,666 2,349 (29.1) 2,983 4,359 (31.6) Average residential revenue ($/MWh) 138.36 148.85 (7.0) 139.01 146.23 (4.9) Average wires charge ($/MWh) 24.90 24.51 1.6 25.94 26.18 (0.9) Appendix Table C: Competitive Electric Segment -- retail and wholesale sales Q2 07 vs. Q2 06 and YTD 07 vs. YTD 06; Mixed measures % % Volume Component Q2 07 Q2 06 Change YTD 07 YTD 06 Change Retail electricity sales volumes (GWh): Native market: Residential 5,072 6,825 (25.7) 10,719 12,057 (11.1) Small business 1,537 2,068 (25.7) 3,180 3,795 (16.2) Total native market 6,609 8,893 (25.7) 13,899 15,852 (12.3) Other markets: Residential 1,010 1,018 (0.8) 1,748 1,629 7.3 Small business 204 169 20.7 368 301 22.3 Total other markets 1,214 1,187 2.3 2,116 1,930 9.6 Large business 3,653 3,552 2.8 7,043 6,785 3.8 Total retail electricity sales volumes 11,476 13,632 (15.8) 23,058 24,567 (6.1) Wholesale electricity sales(13) 9,592 7,585 26.5 18,603 16,870 10.3 Total electricity sales volumes 21,068 21,217 (0.7) 41,661 41,437 0.5 Average kWh/retail customer(14): Residential 3,299 4,012 (17.8) 6,731 6,975 (3.5) Small business 6,676 7,990 (16.4) 13,476 14,460 (6.8) Large business 100,336 70,256 42.8 175,727 130,966 34.2 Weather - percent of normal(15): Cooling degree days 85.3 131.0 (34.9) 88.8 135.9 (34.7) Appendix Table D: Competitive Electric Segment -- retail customer counts Q2 07 vs. Q4 06 and Q2 07 vs. Q2 06; End of period, thousands, # of meters Customer Component Q2 07 Q4 06 6 Month Q2 06 12 Month % Change % Change Retail electricity customers: Native market: Residential 1,560 1,624 (3.9) 1,716 (9.1) Small business 248 258 (3.9) 271 (8.5) Total native market 1,808 1,882 (3.9) 1,987 (9.0) Other markets: Residential 273 247 10.5 227 20.3 Small business 11 9 22.2 7 57.1 Total other markets 284 256 10.9 234 21.4 Large business 36 44 (18.2) 49 (26.5) Total retail electricity customers 2,128 2,182 (2.5) 2,270 (6.3) Estimated share of market(16)(%): Native market: Residential 62 65 (4.6) 69 (10.1) Small business 61 64 (4.7) 68 (10.3) Total ERCOT: Residential 35 37 (5.4) 38 (7.9) Small business 25 26 (3.8) 28 (10.7) Large business 11 14 (21.4) 17 (35.3) Appendix Table E: Competitive Electric Segment -- fuel, purchased power costs and delivery fees Q2 07 vs. Q2 06 and YTD 07 vs. YTD 06; $ millions % % Cost Component Q2 07 Q2 06 Change YTD 07 YTD 06 Change Nuclear fuel 21 22 (4.5) 39 43 (9.3) Lignite/coal 152 113 34.5 290 229 26.6 Total baseload fuel 173 135 28.1 329 272 21.0 Gas/oil fuel and purchased power costs 435 421 3.3 818 689 18.7 Other costs 72 50 44.0 146 122 19.7 Fuel and purchased power costs 680 606 12.2 1,293 1,083 19.4 Delivery fees 291 337 (13.6) 609 650 (6.3) Fuel, purchased power costs and delivery fees 971 943 3.0 1,902 1,733 9.8 Appendix Table F: Competitive Electric Segment -- generation and supply statistics Q2 07 vs. Q2 06 and YTD 07 vs. YTD 06; Mixed measures Generation and % % Supply Statistic Q2 07 Q2 06 Change YTD 07 YTD 06 Change Production and purchased power (GWh): Nuclear (baseload) 4,492 5,098 (11.9) 8,555 10,178 (15.9) Lignite/coal (baseload) 10,211 10,044 1.7 20,197 20,918 (3.4) Total baseload generation 14,703 15,142 (2.9) 28,752 31,096 (7.5) Gas/oil generation 633 1,350 (53.1) 1,382 1,539 (10.2) Purchased power 6,287 5,291 18.8 11,957 9,616 24.3 Total energy supply 21,623 21,783 (0.7) 42,091 42,251 (0.4) Less line loss and power imbalances 555 566 (1.9) 430 814 (47.2) Net energy supply volumes 21,068 21,217 (0.7) 41,661 41,437 0.5 Baseload capacity factors (%): Nuclear 89.6 102.0 (12.2) 85.8 102.3 (16.1) Lignite/coal 85.9 82.4 4.2 86.6 86.4 0.2 Total baseload 87.0 88.0 (1.1) 86.3 90.9 (5.1) Adjusted baseload capacity factors(17)(%): Nuclear 101.5 102.0 (0.5) 101.8 102.3 (0.5) Lignite/coal 96.8 95.0 1.9 95.8 96.2 (0.4) Total baseload 98.1 96.9 1.2 97.5 98.0 (0.5) Appendix Table G: Competitive Electric Segment -- maturity dates of unrealized net commodity contract assets (liabilities) 6/30/07; $ millions unless otherwise noted Source of Fair Value Less Than More Than 1 Year 1-3 Years 4-5 Years 5 Years Total Prices actively quoted 16 (200) (248) (23) (455) Prices provided by other external sources 6 (253) (353) (89) (689) Prices based on models (45) (18) - - (63) Total (23) (471) (601) (112) (1,207) Percentage of total fair value 2 39 50 9 100 Appendix Table H: Competitive Electric Segment -- changes in commodity contract assets and liabilities YTD 07; $ millions Change Component Impact Net commodity contract liability - beginning of period (23) Settlements of positions included in the opening balance(18) 7 Unrealized mark-to-market valuations of positions held -- end of period(19) (1,283) Other activity(20) 143 Net commodity contract liability -- end of period (1,156) Appendix Table I: Regulated Delivery Segment -- operating revenues Q2 07 vs. Q2 06 and YTD 07 vs. YTD 06; $ millions % % Revenue Component Q2 07 Q2 06 Change YTD 07 YTD 06 Change Affiliated (TXU Energy) 232 284 (18.3) 497 551 (9.8) Nonaffiliated 357 320 11.6 710 615 15.4 Total 589 604 (2.5) 1,207 1,166 3.5 Appendix Table J: Regulated Delivery Segment -- operating statistics Q2 07 vs. Q2 06; Mixed measures Operating Statistic Q2 07 Q2 06 % Change Volumes - Electricity distribution (GWh) 24,972 27,244 (8.3) Electricity distribution points of delivery - number of meters (in thousands)(21) 3,077 3,038 1.3 System Average Interruption Duration Index (SAIDI) (non-storm)(22) 77.92 73.54 6.0 System Average Interruption Frequency Index (SAIFI) (non-storm)(22) 1.15 1.11 3.6 Customer Average Interruption Duration Index (CAIDI) (non-storm)(22) 67.78 66.11 2.5 Appendix Table K: Regulated Delivery Segment -- operating statistics YTD 07 vs. YTD 06; Mixed measures Operating Statistic YTD 07 YTD 06 % Change Volumes - Electricity distribution (GWh) 49,966 50,376 (0.8) Attachment 1: Financial Definitions Cash Interest Expense (non-GAAP): Interest expense and related charges less amortization of discount and reacquired debt expense plus capitalized interest. Cash interest expense is a measure used by TXU to assess credit quality. Contribution Margin: Operating revenues (GAAP) less fuel and purchased power costs and delivery fees (GAAP). Debt (non-GAAP): Total debt less transition bonds and debt-related restricted cash. Transition, or securitization, bonds are serviced by a regulatory transition charge on wires rates and are therefore excluded from debt in credit reviews. Debt-related restricted cash is treated as net debt in credit reviews. TXU uses this measure to evaluate its debt and capitalization levels. Debt/EBITDA (non-GAAP): Debt divided by EBITDA. Debt/EBITDA is a measure used by TXU to assess credit quality. EBIT (non-GAAP): Income from continuing operations before interest income, interest expense and related charges, and income tax and special items. EBIT is a measure used by TXU to assess performance. EBITDA (non-GAAP): Income from continuing operations before interest income, interest expense and related charges, and income tax plus depreciation and amortization and special items. EBITDA is a measure used by TXU to assess performance. EBITDA/Interest (non-GAAP): EBITDA divided by cash interest expense is a measure used by TXU to assess credit quality. Free Cash Flow (non-GAAP): Cash provided by operating activities less capital expenditures and nuclear fuel. Used by TXU predominantly as a forecasting tool to estimate cash available for dividends, debt reduction, and other investments. Income from Continuing Operations per Share (GAAP): Per share (diluted) income from continuing operations before extraordinary gain and preference stock dividends. Operational Earnings (non-GAAP): Net income available to common shareholders adjusted for special items and income or losses that are not reflective of continuing operations (such as discontinued operations, extraordinary items and cumulative effect of changes in accounting principles). TXU has adjusted operational earnings for all periods to exclude all effects of recording unrealized gains and losses from cash flow hedge ineffectiveness and other mark-to-market valuations of positions in the long- term hedging program because management believes such presentation will more appropriately reflect the ongoing earnings of the business. TXU relies on operational earnings for evaluation of performance and believes that analysis of the business by external users is enhanced by visibility to both reported GAAP earnings and operational earnings. Operational Earnings per Share (a non-GAAP measure): Per share (diluted) operational earnings. TXU forecasts earnings on such operational earnings basis and is unable to reconcile forecasted operational earnings to a GAAP financial measure because forecasts of special items and material non- recurring items are not practical. TXU relies on operational earnings per share for evaluation of performance and believes that analysis of the business by external users is enhanced by visibility to both reported GAAP earnings and operational earnings. Reported Earnings per Share (GAAP): Per share (diluted) net income available to common shareholders. Return on Average Common Stock Equity Based on Net Income (GAAP): Twelve months ended net income available to common shareholders (GAAP) divided by the average of the beginning and ending common stock equity (GAAP) for the period calculated. Return on Average Common Stock Equity Based on Operational Earnings (non- GAAP): Twelve months ended operational earnings (non-GAAP) divided by the average of the beginning and ending common stock equity (GAAP) for the period calculated. This measure is used to evaluate operational performance and management effectiveness. Return on Average Invested Capital Based on Adjusted Net Income (non- GAAP): Twelve months ended net income (GAAP) plus after-tax interest expense and related charges less interest income on restricted cash related to debt divided by the average of the beginning and ending total capitalization less debt-related restricted cash for the period calculated. This measure is used to evaluate operational performance and management effectiveness. Return on Average Invested Capital Based on Adjusted Operational Earnings (non-GAAP): Twelve months ended operational earnings (non-GAAP) plus preference stock dividends and after-tax interest expense and related charges less interest income on debt proceeds held as restricted cash divided by the average of the beginning and ending total capitalization less debt-related restricted cash for the period calculated. This measure is used to evaluate operational performance and management effectiveness. Special Items (non-GAAP): Unusual charges related to the implementation of the performance improvement program, the effects of unrealized gains and losses from cash flow hedge ineffectiveness and other mark-to-market valuations of positions in the long-term hedging program and other charges, credits or gains that are unusual or nonrecurring. Special items are included in reported GAAP earnings, but are excluded from operational earnings. Total Capitalization (non-GAAP): Total debt plus common stock equity. This measure is used to evaluate operational performance and management effectiveness. Total Debt (GAAP): Long-term debt (including current portion), plus bank loans and commercial paper, plus long-term debt held by subsidiary trusts and preferred securities of subsidiaries. Exhibits: Regulation G - Reconciliation of Non-GAAP Financial Measures to the Most Directly Comparable GAAP Financial Measures Exhibit 1: Return on average common stock equity calculation Twelve months ended 6/30/07 and 6/30/06; $ millions unless otherwise noted Component 6/30/07 6/30/06 Ref Net income available to common shareholders 1,103 1,994 A Income from continuing operations before extraordinary gain/(loss) and cumulative effect of changes in accounting principles 1,065 1,998 Special items 1,221 182 Operational earnings 2,286 2,180 B Average common equity 817 513 C Return on average common stock equity - based on net income (A/C) (%) 135.0 388.7 Return on average common stock equity - based on operational earnings (B/C) (%) 279.8 425.0 Exhibit 2: Return on average invested capital calculation Twelve months ended 6/30/07 and 6/30/06; $ millions unless otherwise noted Component 6/30/07 6/30/06 Ref Net income 1,103 1,994 After-tax interest expense and related charges net of interest income (a) 492 520 Total return (based on net income) 1,595 2,514 A Operational earnings 2,286 2,180 After-tax interest expense and related charges net of interest income (a) 492 520 Total return (based on operational earnings) 2,778 2,700 B Average total capitalization 15,119 14,283 C Return on average invested capital - based on adjusted net income (A/C)(%) 10.5 17.6 Return on average invested capital - based on adjusted operational earnings (B/C) (%) 18.4 18.9 (a) After-tax interest expense and related charges net of interest income Interest expense 817 849 Interest income (60) (49) Net 757 800 Tax at 35% 265 280 Net of tax 492 520 Exhibit 3: Interest and debt coverage ratios Twelve months ended 6/30/07 and 6/30/06; $ millions unless otherwise noted Component 6/30/07 6/30/06 Ref Cash provided by operating activities 2,995 4,103 A Reconciling adjustments from cash flow statement (1,930) (2,105) B Income from continuing operations before extraordinary gain/(loss) and cumulative effect of changes in accounting principles 1,065 1,998 Income tax expense 407 1,038 Interest expense and related charges 817 849 Interest income (60) (49) Depreciation and amortization 821 811 EBITDA 3,050 4,647 Special items 1,963 217 EBITDA (excluding special items) 5,013 4,864 C Interest expense and related charges 817 849 Amortization of discount and reacquired debt expense (20) (14) Capitalized interest 78 24 Cash interest expense 875 859 D Total debt 15,059 13,544 E Transition bonds (1,026) (1,120) Debt-related restricted cash (103) (100) Debt (total debt less transition bonds and debt-related restricted cash) 13,930 12,324 F EBITDA/interest (C/D) 5.7 5.7 Debt/EBITDA (F/C) 2.8 2.5 Cash provided by operating activities+cash interest expense/cash interest expense (A+D/D) 4.4 5.8 Total debt/cash provided by operating activities - ratio (E/A) 5.0 3.3 Exhibit 4a: Consolidated -- operational earnings reconciliation Q2 07; $ millions and $ per share after tax Competitive Competitive Regulated Regulated Factor Electric Electric Delivery Delivery Corp. Corp. Total Total Net income (loss) to common 129 0.28 54 0.12 (62) (0.14) 121 0.26 Special items 327 0.70 4 0.01 (11) (0.02) 320 0.69 Discontinued operations - - - - (11) (0.02) (11)(0.02) Operational earnings (loss) 456 0.98 58 0.13 (84) (0.18) 430 0.93 Average shares - diluted 464 Exhibit 4b: Consolidated -- operational earnings reconciliation Q2 06; $ millions and $ per share after tax Competitive Competitive Regulated Regulated Factor Electric Electric Delivery Delivery Corp. Corp. Total Total Net income (loss) to common 461 0.99 86 0.18 (50) (0.10) 497 1.07 Special items 154 0.33 - - (1) - 153 0.33 Operational earnings (loss) 615 1.32 86 0.18 (51) (0.10) 650 1.40 Average shares - diluted 465 Exhibit 4c: Consolidated -- operational earnings reconciliation YTD 07; $ millions and $ per share after tax Competitive Competitive Regulated Regulated Factor Electric Electric Delivery Delivery Corp. Corp. Total Total Net income (loss) to common (342) (0.75) 140 0.31 (175) (0.38) (377)(0.82) Special items 1,239 2.70 4 0.01 18 0.04 1,261 2.75 Discontinued operations - - - - (11) (0.03) (11)(0.03) Share dilution /rounding - (0.02) - (0.01) - 0.01 - (0.02) Operational earnings (loss) 897 1.93 144 0.31 (168) (0.36) 873 1.88 Average shares - basic 458 Average shares - diluted 464 Exhibit 4d: Consolidated -- operational earnings reconciliation YTD 06; $ millions and $ per share after tax Competitive Competitive Regulated Regulated Factor Electric Electric Delivery Delivery Corp. Corp. Total Total Net income (loss) to common 981 2.09 151 0.32 (59) (0.12) 1,073 2.29 Special items 167 0.35 - - (1) - 166 0.35 Discontinued operations - - - - (60) (0.13) (60)(0.13) Operational earnings (loss) 1,148 2.44 151 0.32 (120) (0.25) 1,179 2.51 Average shares - diluted 470 TXU CORP. DALLAS, TEXAS SUMMARY OF CONSOLIDATED EARNINGS (Unaudited) THREE MONTHS ENDED June 30 2007 2006 % Change Operating Revenues $2,022,000,000 $2,667,000,000 -24.2% Income from Continuing Operations (a) $110,000,000 $497,000,000 -77.9% Consolidated Net Income (b) $121,000,000 $497,000,000 -75.7% Average Number of Shares of Common Stock Outstanding, Basic 459,000,000 458,000,000 0.2% Average Number of Shares of Common Stock Outstanding, Diluted 464,000,000 465,000,000 -0.2% Basic Earnings per Share $0.26 $1.08 -75.9% Diluted Earnings per Share $0.26 $1.07 -75.7% SIX MONTHS ENDED June 30 2007 2006 % Change Operating Revenues $3,691,000,000 $4,971,000,000 -25.7% Income (Loss) from Continuing Operations (c) ($388,000,000) $1,013,000,000 - Consolidated Net Income (Loss) (b) ($377,000,000) $1,073,000,000 - Average Number of Shares of Common Stock Outstanding, Basic 458,000,000 461,000,000 -0.7% Average Number of Shares of Common Stock Outstanding, Diluted 458,000,000 470,000,000 -2.6% Basic Earnings (Loss) per Share ($0.82) $2.33 - Diluted Earnings (Loss) per Share ($0.82) $2.29 - (a) Q2 07 includes net after-tax expenses of $320 million treated as special items. Q2 06 includes net after-tax expenses of $153 million treated as special items. Details of special items are on page 16 of TXU Corp.'s earnings release. (b) Q2 07 and YTD 07 include income from discontinued operations of $11 million related primarily to additional insurance proceeds received related to the 2005 TXU Europe settlement. YTD 06 includes income from discontinued operations of $60 million re (c) YTD 07 includes net after-tax expenses of $1,261 million treated as special items. YTD 06 includes net after-tax expenses of $166 million treated as special items. (1) Per share earnings amounts reflect diluted earnings per share. See calculations in Tables 2a and 2b on pages 5 and 6. (2) Operational earnings is a non-GAAP measure that adjusts net income for special items and income or losses that are not related to continuing operations. See Attachment 1: Financial Definitions for a detailed definition of operational earnings and other GAAP and non-GAAP financial measures used in this release. (3) For second quarter 2007, the dilution calculation for operational earnings reflects the addition to net income available to common shareholders of interest on convertible senior notes of $0.3 million (after tax), and the addition to shares outstanding of 4.9 million shares related to the effect of: 1) share-based compensation (3.4 million) and 2) convertible senior notes (1.5 million). For second quarter 2006, the dilution calculation for reported and operational earnings per share reflects the addition to net income available to common shareholders of interest on convertible senior notes of $0.3 million (after tax), and the addition to shares outstanding of 7.5 million shares related to the effect of: 1) share-based compensation (5.0 million), 2) convertible senior notes (1.5 million) and 3) equity-linked securities (1.0 million). (4) Because of anti-dilution rules, average basic shares outstanding are used in calculating year-to-date 2007 reported earnings. The dilution calculation for operational earnings reflects the addition to net income available to common shareholders of interest on convertible senior notes of $0.6 million (after tax), and the addition to shares outstanding of 5.9 million shares related to the effect of: 1) share-based compensation (4.4 million) and 2) convertible senior notes (1.5 million). For year-to-date 2006, the dilution calculation for reported and operational earnings per share reflects the addition to net income available to common shareholders of interest on convertible senior notes of $0.6 million (after tax), and the addition to shares outstanding of 8.7 million shares related to the effect of: 1) share-based compensation (5.6 million), 2) equity-linked securities (1.6 million) and 3) convertible senior notes (1.5 million). (5) Facility with a May 2007 maturity date was terminated and replaced on March 1, 2007 with a new 364-day facility due to mature in February 2008 with terms comparable to TXU's other existing facilities. The amount in the 12/31/06 column was under the since-terminated facility. (6) Reflects unrealized mark-to-market and cash flow hedge ineffectiveness gains and losses on the company's long-term hedging program. (7) Generation development charges represent estimated expenses associated with the suspension (in first quarter 2007) of eight of 11 coal-fueled generation facilities in Texas and their planned termination upon closing of the proposed merger announced February 26, 2007. (8) Includes approximately $2 million related to the write-off of natural gas-fired generation plant inventories. (9) Includes expenses previously incurred and deferred related to the analysis and planning associated with certain previously anticipated strategic transactions that are no longer expected to be consummated as a result of the proposed merger agreement and expenses associated with the proposed merger. (10) Includes sales and purchases of balancing electricity to/from ERCOT. (11) Includes unrealized net losses of $403 million and $1,003 million in second quarter and year-to-date 2007, respectively, and unrealized net gains of $138 million and $118 million in second quarter and year-to-date 2006, respectively, from cash flow hedge ineffectiveness and other mark-to-market valuations of long-term hedging program positions. Amounts also include net "day one" losses on commodity price hedge transactions entered into at below market prices that totaled $37 million ($63 million loss related to the long-term hedging program) and $134 million ($160 million loss related to the long-term hedging program) for second quarter and year-to-date 2007, respectively, and a net gain of $3 million ($109 million loss related to the long-term hedging program) and a net loss of $106 million ($109 million loss related to the long-term hedging program) for second quarter and year-to-date 2006, respectively. (12) Includes physical commodity trading activity not subject to mark-to- market accounting of $5 million in net losses in second quarter 2007 and 2006, and $6 million and $15 million in net losses in year-to-date 2007 and 2006, respectively. (13) Includes volumes related to ERCOT balancing of 302 gigawatt-hours (GWh) of net sales in second quarter 2007, 267 GWh of net purchases in second quarter 2006, and 626 GWh and 1,165 GWh of net sales in year-to-date 2007 and 2006, respectively. (14) Based upon the average of the period beginning and ending customers. (15) Average for service territory is based on a 50 percent - Dallas/Fort Worth, 25 percent - Mineral Wells and 25 percent - Waco weighting. Weather data is obtained from WeatherBank, Inc., an independent company that collects and archives weather data from reporting stations of the National Oceanic and Atmospheric Administration (a federal agency under the U.S. Department of Commerce). (16) End of period; estimated market share is based on the estimated number of customers (meters) in the native market and the estimated number of customers (meters) in ERCOT that have choice. (17) Excludes planned outages and economic back-down. (18) Represents reversals of unrealized mark-to-market valuations of these positions recognized in earnings prior to the beginning of the period, which offset gains and losses realized upon settlement of the positions in the current period. (19) Includes $164 million in losses and $30 million in gains recorded at contract inception dates. (20) Amounts have not been recognized in current- and prior-year mark-to- market earnings; includes initial values of positions involving the receipt or payment of cash or other consideration such as option premiums paid and received. Activity for the period includes payments of $39 million related to natural gas physical swap transactions and a $102 million premium paid in 2007 related to a structured economic hedge transaction in the long-term hedging program. (21) Includes lighting sites, primarily guard lights, for which TXU Energy is the REP, but are not included in TXU Energy's customer count. Such sites totaled 79,856 and 84,362 at June 30, 2007 and 2006, respectively. Adjusting for the guard lights, which have minimal value, points of delivery increased 1.5 percent. (22) SAIDI is the average number of electric service outage minutes per customer in a year. SAIFI is the average number of electric service interruptions per customer in a year. CAIDI is the average duration in minutes of interruptions to electric service in a year. Statistics are based on the preceding twelve month data. DATASOURCE: TXU Corp. Web site: http://www.txu.com/

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