§ 1.1502-28. Consolidated section 108.

(i) Facts. P is the common parent of a consolidated group that includes subsidiary S1. P owns 80 percent of the stock of S1. In Year 1, the P group sustained a $250 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $125 was attributable to P and $125 was attributable to S1. On Day 1 of Year 2, P acquired 100 percent of the stock of S2, and S2 joined the P group. As of the beginning of Year 2, S2 had a $50 net operating loss carryover from Year 1, a separate return limitation year. In Year 2, the P group sustained a $200 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $90 was attributable to P, $70 was attributable to S1, and $40 was attributable to S2. In Year 3, S2 realized $200 of excluded COD income from the discharge of non-intercompany indebtedness. In that same year, the P group sustained a $50 consolidated net operating loss, of which $40 was attributable to S1 and $10 was attributable to S2 under the principles of § 1.1502-21(b)(2)(iv). As of the beginning of Year 4, S2 had Asset A with a fair market value of $10. After the computation of tax imposed for Year 3 and before the application of sections 108 and 1017 and this section, Asset A had a basis of $40 and S2 had no liabilities.

(ii) Analysis—(A) Reduction of tax attributes attributable to debtor. Pursuant to paragraph (a)(2) of this section, the tax attributes attributable to S2 must first be reduced to take into account its excluded COD income in the amount of $200.

(1) Reduction of net operating losses. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, the net operating loss and the net operating loss carryovers attributable to S2 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 3 is reduced by $10, the portion of the consolidated net operating loss attributable to S2, to $40. Then, again pursuant to section 108(b)(4)(B), S2's net operating loss carryover of $50 from its separate return limitation year is reduced to $0. Finally, the consolidated net operating loss carryover from Year 2 is reduced by $40, the portion of that consolidated net operating loss carryover attributable to S2, to $160.

(2) Reduction of basis. Following the reduction of the net operating loss and the net operating loss carryovers attributable to S2, S2 reduces its basis in its assets pursuant to section 1017 and § 1.1017-1. Accordingly, S2 reduces its basis in Asset A by $40, from $40 to $0.

(B) Reduction of remaining consolidated tax attributes. The remaining $60 of excluded COD income then reduces consolidated tax attributes pursuant to paragraph (a)(4) of this section. In particular, the remaining $40 consolidated net operating loss for Year 3 is reduced to $0. Then, the consolidated net operating loss carryover from Year 1 is reduced by $20 from $250 to $230. Pursuant to paragraph (a)(4) of this section, a pro rata amount of the consolidated net operating loss carryover from Year 1 that is attributable to each of P and S1 is treated as reduced. Therefore, $10 of the consolidated net operating loss carryover from Year 1 that is attributable to each of P and S1 is treated as reduced.

(i) Facts. P is the common parent of a consolidated group that includes subsidiaries S1 and S2. P owns 100 percent of the stock of S1 and S1 owns 100 percent of the stock of S2. None of P, S1, or S2 has a separate return limitation year. In Year 1, the P group sustained a $50 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $10 was attributable to P, $20 was attributable to S1, and $20 was attributable to S2. In Year 2, the P group sustained a $70 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $30 was attributable to P, $30 was attributable to S1, and $10 was attributable to S2. In Year 3, S1 realized $170 of excluded COD income from the discharge of non-intercompany indebtedness. In that same year, the P group sustained a $50 consolidated net operating loss, of which $10 was attributable to S1 and $40 was attributable to S2 under the principles of § 1.1502-21(b)(2)(iv). As of the beginning of Year 4, S1's sole asset was the stock of S2, and S2 had Asset A with a $10 value. After the computation of tax imposed for Year 3 and before the application of sections 108 and 1017 and this section, S1 had an $80 basis in the S2 stock, Asset A had a basis of $0, and neither S1 nor S2 had any liabilities.

(ii) Analysis—(A) Reduction of tax attributes attributable to debtor. Pursuant to paragraph (a)(2) of this section, the tax attributes attributable to S1 must first be reduced to take into account its excluded COD income in the amount of $170.

(1) Reduction of net operating losses. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, the net operating loss and the net operating loss carryovers attributable to S1 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 3 is reduced by $10, the portion of the consolidated net operating loss for Year 3 attributable to S1, to $40. Then, the consolidated net operating loss carryover from Year 1 is reduced by $20, the portion of that consolidated net operating loss carryover attributable to S1, to $30, and the consolidated net operating loss carryover from Year 2 is reduced by $30, the portion of that consolidated net operating loss carryover attributable to S1, to $40.

(2) Reduction of basis. Following the reduction of the net operating loss and the net operating loss carryovers attributable to S1, S1 reduces its basis in its assets pursuant to section 1017 and § 1.1017-1. Accordingly, S1 reduces its basis in the stock of S2 by $80, from $80 to $0.

(3) Tiering down of stock basis reduction. Pursuant to paragraph (a)(3) of this section, for purposes of sections 108 and 1017 and this section, S2 is treated as realizing $80 of excluded COD income. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, therefore, the net operating loss and net operating loss carryovers attributable to S2 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 3 is reduced by an additional $40, the portion of the consolidated net operating loss for Year 3 attributable to S2, to $0. Then, the consolidated net operating loss carryover from Year 1 is reduced by $20, the portion of that consolidated net operating loss carryover attributable to S2, to $10. Then, the consolidated net operating loss carryover from Year 2 is reduced by $10, the portion of that consolidated net operating loss carryover attributable to S2, to $30. S2's remaining $10 of excluded COD income does not reduce consolidated tax attributes attributable to P or S1 under paragraph (a)(4) of this section.

(B) Reduction of remaining consolidated tax attributes. Finally, pursuant to paragraph (a)(4) of this section, S1's remaining $30 of excluded COD income reduces the remaining consolidated tax attributes. In particular, the remaining $10 consolidated net operating loss carryover from Year 1 is reduced by $10 to $0, and the remaining $30 consolidated net operating loss carryover from Year 2 is reduced by $20 to $10.

(i) Facts. P is the common parent of a consolidated group that includes subsidiaries S1, S2, and S3. P owns 100 percent of the stock of S1, S1 owns 100 percent of the stock of S2, and S2 owns 100 percent of the stock of S3. None of P, S1, S2, or S3 had a separate return limitation year prior to Year 1. In Year 1, the P group sustained a $150 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $50 was attributable to S2, and $100 was attributable to S3. In Year 2, the P group sustained a $50 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $40 was attributable to S1 and $10 was attributable to S2. In Year 3, S1 realized $170 of excluded COD income from the discharge of non-intercompany indebtedness. In that same year, the P group sustained a $50 consolidated net operating loss, of which $10 was attributable to S1, $20 was attributable to S2, and $20 was attributable to S3 under the principles of § 1.1502-21(b)(2)(iv). At the beginning of Year 4, S1's only asset was the stock of S2, and S2's only asset was the stock of S3 with a value of $10. After the computation of tax imposed for Year 3 and before the application of sections 108 and 1017 and this section, S1's stock of S2 had a basis of $120 and S2's stock of S3 had a basis of $180. In addition, none of S1, S2, and S3 had any liabilities.

(ii) Analysis—(A) Reduction of tax attributes attributable to debtor. Pursuant to paragraph (a)(2) of this section, the tax attributes attributable to S1 must first be reduced to take into account its excluded COD income in the amount of $170.

(1) Reduction of net operating losses. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, the net operating loss and the net operating loss carryovers attributable to S1 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 3 is reduced by $10, the portion of the consolidated net operating loss attributable to S1, to $40. Then, the consolidated net operating loss carryover from Year 2 is reduced by $40, the portion of that consolidated net operating loss carryover attributable to S1, to $10.

(2) Reduction of basis. Following the reduction of the net operating loss and the net operating loss carryovers attributable to S1, S1 reduces its basis in its assets pursuant to section 1017 and § 1.1017-1. Accordingly, S1 reduces its basis in the stock of S2 by $120, from $120 to $0.

(B) Tiering down of stock basis reduction to S2. Pursuant to paragraph (a)(3) of this section, for purposes of sections 108 and 1017 and this section, S2 is treated as realizing $120 of excluded COD income. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, therefore, the net operating loss and net operating loss carryovers attributable to S2 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 3 is further reduced by $20, the portion of the consolidated net operating loss attributable to S2, to $20. Then, the consolidated net operating loss carryover from Year 1 is reduced by $50, the portion of that consolidated net operating loss carryover attributable to S2, to $100. Then, the consolidated net operating loss carryover from Year 2 is further reduced by $10, the portion of that consolidated net operating loss carryover attributable to S2, to $0. Following the reduction of the net operating loss and the net operating loss carryovers attributable to S2, S2 reduces its basis in its assets pursuant to section 1017 and § 1.1017-1. Accordingly, S2 reduces its basis in its S3 stock by $40 to $140.

(C) Tiering down of stock basis reduction to S3. Pursuant to paragraph (a)(3) of this section, for purposes of sections 108 and 1017 and this section, S3 is treated as realizing $40 of excluded COD income. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, therefore, the net operating loss and the net operating loss carryovers attributable to S3 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 3 is further reduced by $20, the portion of the consolidated net operating loss attributable to S3, to $0. Then, the consolidated net operating loss carryover from Year 1 is reduced by $20, the lesser of the portion of that consolidated net operating loss carryover attributable to S3 and the remaining excluded COD income, to $80.

(i) Facts. P is the common parent of a consolidated group that includes subsidiaries S1, S2, and S3. P owns 100 percent of the stock of each of S1 and S2. Each of S1 and S2 owns stock of S3 that represents 50 percent of the value of the stock of S3. None of P, S1, S2, or S3 had a separate return limitation year prior to Year 1. In Year 1, the P group sustained a $160 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $10 was attributable to P, $50 was attributable to S2, and $100 was attributable to S3. In Year 2, the P group sustained a $110 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $40 was attributable to S1 and $70 was attributable to S2. In Year 3, S1 realized $200 of excluded COD income from the discharge of non-intercompany indebtedness, and S2 realized $270 of excluded COD income from the discharge of non-intercompany indebtedness. In that same year, the P group sustained a $50 consolidated net operating loss, of which $10 was attributable to S1, $20 was attributable to S2, and $20 was attributable to S3 under the principles of § 1.1502-21(b)(2)(iv). At the beginning of Year 4, S3 had one asset with a value of $10. After the computation of tax imposed for Year 3 and before the application of sections 108 and 1017 and this section, S1's basis in its S3 stock was $60, S2's basis in its S3 stock was $120, and S3's asset had a basis of $200. In addition, none of S1, S2, and S3 had any liabilities.

(ii) Analysis—(A) Reduction of tax attributes attributable to debtors. Pursuant to paragraph (b)(1)(i) of this section, the tax attributes attributable to each of S1 and S2 are reduced pursuant to paragraph (a)(2) of this section. Then, pursuant to paragraph (a)(3) of this section, the tax attributes attributable to S3 are reduced so as to reflect a reduction of S1's and S2's basis in the stock of S3. Then, paragraph (a)(4) is applied to reduce additional tax attributes.

(1) Reduction of net operating losses generally. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, the net operating losses and the net operating loss carryovers attributable to S1 and S2 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B).

(2) Reduction of net operating losses attributable to S1. The consolidated net operating loss for Year 3 is reduced by $10, the portion of the consolidated net operating loss attributable to S1, to $40. Then, the consolidated net operating loss carryover from Year 2 is reduced by $40, the portion of that consolidated net operating loss carryover attributable to S1, to $70.

(3) Reduction of net operating losses attributable to S2. The consolidated net operating loss for Year 3 is also reduced by $20, the portion of the consolidated net operating loss attributable to S2, to $20. Then, the consolidated net operating loss carryover from Year 1 is reduced by $50, the portion of that consolidated net operating loss carryover attributable to S2, to $110. Then, the consolidated net operating loss carryover from Year 2 is reduced by $70, the portion of that consolidated net operating loss carryover attributable to S2, to $0.

(4) Reduction of basis. Following the reduction of the net operating losses and the net operating loss carryovers attributable to S1 and S2, S1 and S2 must reduce their basis in their assets pursuant to section 1017 and § 1.1017-1. Accordingly, S1 reduces its basis in the stock of S3 by $60, from $60 to $0, and S2 reduces its basis in the stock of S3 by $120, from $120 to $0.

(B) Tiering down of basis reduction. Pursuant to paragraph (a)(3) of this section, for purposes of sections 108 and 1017 and this section, S3 is treated as realizing $180 of excluded COD income. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, therefore, the net operating loss and the net operating loss carryovers attributable to S3 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 3 is further reduced by $20, the portion of the consolidated net operating loss attributable to S3, to $0. Then, the consolidated net operating loss carryover from Year 1 is reduced by $100, the portion of that consolidated net operating loss carryover attributable to S3, to $10. Following the reduction of the net operating loss and the net operating loss carryover attributable to S3, S3 reduces its basis in its asset pursuant to section 1017 and § 1.1017-1. Accordingly, S3 reduces its basis in its asset by $60, from $200 to $140.

(C) Reduction of remaining consolidated tax attributes. Finally, pursuant to paragraph (a)(4) of this section, the remaining $90 of S1's excluded COD income and the remaining $10 of S2's excluded COD income reduce the remaining consolidated tax attributes. In particular, the remaining $10 consolidated net operating loss carryover from Year 1 is reduced by $10 to $0. Because that amount is less than the aggregate amount of remaining excluded COD income, such income is applied on a pro rata basis to reduce the remaining consolidated tax attributes. Accordingly, $9 of S1's remaining excluded COD income and $1 of S2's remaining excluded COD income is applied to reduce the remaining consolidated net operating loss carryover from Year 1. Consequently, of S1's excluded COD income of $200, only $119 is applied to reduce tax attributes, and, of S2's excluded COD income of $270, only $261 is applied to reduce tax attributes.

(i) Facts. P is the common parent of a consolidated group that includes subsidiaries S1, S2, and S3. P owns 100 percent of the stock of S1 and S2, and S1 owns 100 percent of the stock of S3. None of P, S1, S2, or S3 has a separate return limitation year prior to Year 1. In Year 1, the P group sustained a $90 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $10 was attributable to P, $15 was attributable to S1, $20 was attributable to S2, and $45 was attributable to S3. On January 1 of Year 2, P realized $140 of excluded COD income from the discharge of non-intercompany indebtedness. On December 31 of Year 2, S1 issued stock representing 50 percent of the vote and value of its outstanding stock to a person that was not a member of the group. As a result of the issuance of stock, S1 and S3 ceased to be members of the P group. For the consolidated return year of Year 2, the P group sustained a $60 consolidated net operating loss, of which $5 was attributable to S1, $40 was attributable to S2, and $15 was attributable to S3 under the principles of § 1.1502-21(b)(2)(iv). As of the beginning of Year 3, P's only assets were the stock of S1 and S2, S1's sole asset was the stock of S3, S2 had Asset A with a value of $10, and S3 had Asset B with a value of $10. After the computation of tax imposed for Year 2 and before the application of sections 108 and 1017 and this section, P had a $80 basis in the S1 stock and a $50 basis in the S2 stock, S1 had a $80 basis in the S3 stock, and Asset A and B each had a basis of $10. In addition, none of P, S1, S2, and S3 had any liabilities.

(ii) Analysis. Pursuant to paragraph (a)(2) of this section, the tax attributes attributable to P must first be reduced to take into account its excluded COD income in the amount of $140.

(A) Reduction of net operating losses. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, the net operating loss and the net operating loss carryover attributable to P under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss carryover from Year 1 is reduced by $10, the portion of that consolidated net operating loss carryover attributable to P, to $80.

(B) Reduction of basis. Following the reduction of the net operating loss and the net operating loss carryover attributable to P, P reduces its basis in its assets pursuant to section 1017 and § 1.1017-1. Accordingly, P reduces its basis in the stock of S1 by $80, from $80 to $0, and its basis in the stock of S2 by $50, from $50 to $0.

(C) Tiering down of stock basis reduction to S1. Pursuant to paragraph (a)(3) of this section, for purposes of sections 108 and 1017 and this section, S1 is treated as realizing $80 of excluded COD income, despite the fact that it ceases to be a member of the group at the end of the day on December 31 of Year 2. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, therefore, the net operating loss and net operating loss carryovers attributable to S1 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 2 is reduced by $5, the portion of the consolidated net operating loss for Year 2 attributable to S1, to $55. Then, the consolidated net operating loss carryover from Year 1 is reduced by an additional $15, the portion of that consolidated net operating loss carryover attributable to S1, to $65. Following the reduction of the net operating loss and the net operating loss carryover attributable to S1, S1 reduces its basis in its assets pursuant to section 1017 and § 1.1017-1. Accordingly, S1 reduces its basis in the stock of S3 by $60, from $80 to $20.

(D) Tiering down of stock basis reduction to S2. Pursuant to paragraph (a)(3) of this section, for purposes of sections 108 and 1017 and this section, S2 is treated as realizing $50 of excluded COD income. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, therefore, the net operating loss and net operating loss carryovers attributable to S2 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 2 is reduced by an additional $40, the portion of the consolidated net operating loss for Year 2 attributable to S2, to $15. Then, the consolidated net operating loss carryover from Year 1 is reduced by an additional $10, a portion of the consolidated net operating loss carryover attributable to S2, to $55.

(E) Tiering down of stock basis reduction to S3. Pursuant to paragraph (a)(3) of this section, for purposes of sections 108 and 1017 and this section, S3 is treated as realizing $60 of excluded COD income (by reason of S1's reduction in its basis of its S3 stock). Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, therefore, the net operating loss and net operating loss carryovers attributable to S3 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 2 is reduced by an additional $15, the portion of the consolidated net operating loss for Year 2 attributable to S3, to $0. Then, the consolidated net operating loss carryover from Year 1 is reduced by an additional $45, the portion of that consolidated net operating loss carryover attributable to S3, to $10.

(i) Facts. P1 is the common parent of a consolidated group that includes subsidiaries S1, S2, and S3. P1 owns 100 percent of the stock of S1 and S2. S1 owns 100 percent of the stock of S3. None of P1, S1, S2, or S3 has a separate return limitation year prior to Year 1. In Year 1, the P1 group sustained a $120 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $40 was attributable to P1, $35 was attributable to S1, $30 was attributable to S2, and $15 was attributable to S3. On January 1 of Year 2, S3 realized $65 of excluded COD income from the discharge of non-intercompany indebtedness. On June 30 of Year 2, S3 issued stock representing 80 percent of the vote and value of its outstanding stock to P2, the common parent of another group. As a result of the issuance of stock, S3 ceased to be a member of the P1 group and became a member of the P2 group. For the consolidated return year of Year 2, the P1 group sustained a $50 consolidated net operating loss, of which $5 was attributable to S1, $40 was attributable to S2, and $5 was attributable to S3 under the principles of § 1.1502-21(b)(2)(iv). As of the beginning of its taxable year beginning on July 1 of Year 2, S3's sole asset was Asset A with a $10 value. After the computation of tax imposed for Year 2 on the P1 group and before the application of sections 108 and 1017 and this section and the computation of tax imposed for Year 2 on the P2 group, Asset A had a basis of $0. In addition, S3 had no liabilities. On January 1 of Year 3, P1 sold all of its stock of S1.

(ii) Analysis—(A) Reduction of tax attributes attributable to debtor. Pursuant to paragraph (a)(2) of this section, the tax attributes attributable to S3 must first be reduced to take into account its excluded COD income in the amount of $65. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, the net operating loss and the net operating loss carryover attributable to S3 under the principles of § 1.1502-21(b)(2)(iv) are reduced in the order prescribed by section 108(b)(4)(B). Accordingly, the consolidated net operating loss for Year 2 is reduced by $5, the portion of the consolidated net operating loss for Year 2 attributable to S3, to $45. Then, the consolidated net operating loss carryover from Year 1 is reduced by $15, the portion of that consolidated net operating loss carryover attributable to S3, to $105.

(B) Reduction of remaining consolidated tax attributes. Pursuant to paragraphs (a)(4) and (b)(8) of this section, S3's remaining $45 of excluded COD income reduces the remaining consolidated tax attributes in the P1 group. In particular, the remaining $45 consolidated net operating loss for Year 2 is reduced by an additional $45 to $0.

(C) Basis Adjustments. For purposes of computing P1's gain or loss on the sale of the S1 stock in Year 3, P1's basis in its S1 stock will reflect a net positive adjustment of $40, which is the excess of the amount of S3's excluded COD income that is applied to reduce attributes ($65) over the reduction of S1's and S3's attributes in respect of such excluded COD income ($25).

(i) Facts. P is the common parent of a consolidated group that includes subsidiaries S1 and S2. P owns 100 percent of the stock of S1, and S1 owns 100 percent of the stock of S2. None of P, S1, or S2 has a separate return limitation year prior to Year 1. In Year 1, the P group sustained a $50 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $10 was attributable to P, $20 was attributable to S1, and $20 was attributable to S2. On January 1 of Year 2, S1 realized $55 of excluded COD income from the discharge of non-intercompany indebtedness. On June 30 of Year 2, P transferred all of its assets to S1 in a transaction to which section 381(a) applied. As a result of that transaction, pursuant to § 1.1502-75(d)(2)(ii), S1 succeeded P as the common parent of the group. Pursuant to § 1.1502-75(d)(2)(iii), S1's taxable year closed on the date of the acquisition. However, P's taxable year did not close. On the consolidated return for Year 2, the group sustained a $50 consolidated net operating loss. Under the principles of § 1.1502-21(b)(2)(iv), of that amount, $10 was attributable to S1 for its taxable year that ended on June 30, $15 was attributable to S1 as the successor of P, and $25 was attributable to S2.

(ii) Analysis. Pursuant to paragraph (a)(2) of this section, the tax attributes attributable to S1 must first be reduced to take into account its excluded COD income in the amount of $55. For this purpose, S1's attributes that remain after the determination of tax for the group for Year 2 are subject to reduction. Pursuant to section 108(b)(2)(A) and paragraph (a) of this section, the net operating loss and the net operating loss carryover attributable to S1 under the principles of § 1.1502-21(b)(2)(iv) are reduced. Accordingly, the consolidated net operating loss for Year 2 is reduced by $25, the portion of the consolidated net operating loss for Year 2 attributable to S1, to $25. Then, the consolidated net operating loss carryover from Year 1 is reduced by $30, the portion of that consolidated net operating loss carryover attributable to S1 (which includes the portion attributable to P), to $20.