1.988-6—Nonfunctional currency contingent payment debt instruments.

(a) In general— (1) Scope. This section determines the accrual of interest and the amount, timing, source, and character of any gain or loss on nonfunctional currency contingent payment debt instruments described in this paragraph (a)(1) and to which § 1.1275-4(a) would otherwise apply if the debt instrument were denominated in the taxpayer's functional currency. Except as provided by the rules in this section, the rules in § 1.1275-4 (relating to contingent payment debt instruments) apply to the following instruments—
(i) A debt instrument described in § 1.1275-4(b)(1) for which all payments of principal and interest are denominated in, or determined by reference to, a single nonfunctional currency and which has one or more non-currency related contingencies;
(ii) A debt instrument described in § 1.1275-4(b)(1) for which payments of principal or interest are denominated in, or determined by reference to, more than one currency and which has no non-currency related contingencies;
(iii) A debt instrument described in § 1.1275-4(b)(1) for which payments of principal or interest are denominated in, or determined by reference to, more than one currency and which has one or more non-currency related contingencies; and
(iv) A debt instrument otherwise described in paragraph (a)(1)(i), (ii) or (iii) of this section, except that the debt instrument is described in § 1.1275-4(c)(1) rather than § 1.1275-4(b)(1) (e.g., the instrument is issued for non-publicly traded property).
(2) Exception for hyperinflationary currencies— (i) In general. Except as provided in paragraph (a)(2)(ii) of this section, this section shall not apply to an instrument described in paragraph (a)(1) of this section if any payment made under such instrument is determined by reference to a hyperinflationary currency, as defined in § 1.985-1(b)(2)(ii)(D). In such case, the amount, timing, source and character of interest, principal, foreign currency gain or loss, and gain or loss relating to a non-currency contingency shall be determined under the method that reflects the instrument's economic substance.
(ii) Discretion as to method. If a taxpayer does not account for an instrument described in paragraph (a)(2)(i) of this section in a manner that reflects the instrument's economic substance, the Commissioner may apply the rules of this section to such an instrument or apply the principles of § 1.988-2(b)(15), reasonably taking into account the contingent feature or features of the instrument.
(b) Instruments described in paragraph (a)(1)(i) of this section— (1) In general. Paragraph (b)(2) of this section provides rules for applying the noncontingent bond method (as set forth in § 1.1275-4(b)) in the nonfunctional currency in which a debt instrument described in paragraph (a)(1)(i) of this section is denominated, or by reference to which its payments are determined (the denomination currency). Paragraph (b)(3) of this section describes how amounts determined in paragraph (b)(2) of this section shall be translated from the denomination currency of the instrument into the taxpayer's functional currency. Paragraph (b)(4) of this section describes how gain or loss (other than foreign currency gain or loss) shall be determined and characterized with respect to the instrument. Paragraph (b)(5) of this section describes how foreign currency gain or loss shall be determined with respect to accrued interest and principal on the instrument. Paragraph (b)(6) of this section provides rules for determining the source and character of any gain or loss with respect to the instrument. Paragraph (b)(7) of this section provides rules for subsequent holders of an instrument who purchase the instrument for an amount other than the adjusted issue price of the instrument. Paragraph (c) of this section provides examples of the application of paragraph (b) of this section. See paragraph (d) of this section for the determination of the denomination currency of an instrument described in paragraph (a)(1)(ii) or (iii) of this section. See paragraph (e) of this section for the treatment of an instrument described in paragraph (a)(1)(iv) of this section.
(2) Application of noncontingent bond method— (i) Accrued interest. Interest accruals on an instrument described in paragraph (a)(1)(i) of this section are initially determined in the denomination currency of the instrument by applying the noncontingent bond method, set forth in § 1.1275-4(b), to the instrument in its denomination currency. Accordingly, the comparable yield, projected payment schedule, and comparable fixed rate debt instrument, described in § 1.1275-4(b)(4), are determined in the denomination currency. For purposes of applying the noncontingent bond method to instruments described in this paragraph, the applicable Federal rate described in § 1.1275-4(b)(4)(i) shall be the rate described in § 1.1274-4(d) with respect to the denomination currency.
(ii) Net positive and negative adjustments. Positive and negative adjustments, and net positive and net negative adjustments, with respect to an instrument described in paragraph (a)(1)(i) of this section are determined by applying the rules of § 1.1275-4(b)(6) (and § 1.1275-4(b)(9)(i) and (ii), if applicable) in the denomination currency. Accordingly, a net positive adjustment is treated as additional interest (in the denomination currency) on the instrument. A net negative adjustment first reduces interest that otherwise would be accrued by the taxpayer during the current tax year in the denomination currency. If a net negative adjustment exceeds the interest that would otherwise be accrued by the taxpayer during the current tax year in the denomination currency, the excess is treated as ordinary loss (if the taxpayer is a holder of the instrument) or ordinary income (if the taxpayer is the issuer of the instrument). The amount treated as ordinary loss by a holder with respect to a net negative adjustment is limited, however, to the amount by which the holder's total interest inclusions on the debt instrument (determined in the denomination currency) exceed the total amount of the holder's net negative adjustments treated as ordinary loss on the debt instrument in prior taxable years (determined in the denomination currency). Similarly, the amount treated as ordinary income by an issuer with respect to a net negative adjustment is limited to the amount by which the issuer's total interest deductions on the debt instrument (determined in the denomination currency) exceed the total amount of the issuer's net negative adjustments treated as ordinary income on the debt instrument in prior taxable years (determined in the denomination currency). To the extent a net negative adjustment exceeds the current year's interest accrual and the amount treated as ordinary loss to a holder (or ordinary income to the issuer), the excess is treated as a negative adjustment carryforward, within the meaning of § 1.1275-4(b)(6)(iii)(C), in the denomination currency.
(iii) Adjusted issue price. The adjusted issue price of an instrument described in paragraph (a)(1)(i) of this section is determined by applying the rules of § 1.1275-4(b)(7) in the denomination currency. Accordingly, the adjusted issue price is equal to the debt instrument's issue price in the denomination currency, increased by the interest previously accrued on the debt instrument (determined without regard to any net positive or net negative adjustments on the instrument) and decreased by the amount of any noncontingent payment and the projected amount of any contingent payment previously made on the instrument. All adjustments to the adjusted issue price are calculated in the denomination currency.
(iv) Adjusted basis. The adjusted basis of an instrument described in paragraph (a)(1)(i) of this section is determined by applying the rules of § 1.1275- 4(b)(7) in the taxpayer's functional currency. In accordance with those rules, a holder's basis in the debt instrument is increased by the interest previously accrued on the debt instrument (translated into functional currency), without regard to any net positive or net negative adjustments on the instrument (except as provided in paragraph (b)(7) or (8) of this section, if applicable), and decreased by the amount of any noncontingent payment and the projected amount of any contingent payment previously made on the instrument to the holder (translated into functional currency). See paragraph (b)(3)(iii) of this section for translation rules.
(v) Amount realized. The amount realized by a holder and the repurchase price paid by the issuer on the scheduled or unscheduled retirement of a debt instrument described in paragraph (a)(1)(i) of this section are determined by applying the rules of § 1.1275-4(b)(7) in the denomination currency. For example, with regard to a scheduled retirement at maturity, the holder is treated as receiving the projected amount of any contingent payment due at maturity, reduced by the amount of any negative adjustment carryforward. For purposes of translating the amount realized by the holder into functional currency, the rules of paragraph (b)(3)(iv) of this section shall apply.
(3) Treatment and translation of amounts determined under noncontingent bond method— (i) Accrued interest. The amount of accrued interest, determined under paragraph (b)(2)(i) of this section, is translated into the taxpayer's functional currency at the average exchange rate, as described in § 1.988-2(b)(2)(iii)(A), or, at the taxpayer's election, at the appropriate spot rate, as described in § 1.988-2(b)(2)(iii)(B).
(ii) Net positive and negative adjustments— (A) Net positive adjustments. A net positive adjustment, as referenced in paragraph (b)(2)(ii) of this section, is translated into the taxpayer's functional currency at the spot rate on the last day of the taxable year in which the adjustment is taken into account under § 1.1275-4(b)(6), or, if earlier, the date the instrument is disposed of or otherwise terminated.
(B) Net negative adjustments. A net negative adjustment is treated and, where necessary, is translated from the denomination currency into the taxpayer's functional currency under the following rules:
(1) The amount of a net negative adjustment determined in the denomination currency that reduces the current year's interest in that currency shall first reduce the current year's accrued but unpaid interest, and then shall reduce the current year's interest which was accrued and paid. No translation is required.
(2) The amount of a net negative adjustment treated as ordinary income or loss under § 1.1275-4(b)(6)(iii)(B) first is attributable to accrued but unpaid interest accrued in prior taxable years. For this purpose, the net negative adjustment shall be treated as attributable to any unpaid interest accrued in the immediately preceding taxable year, and thereafter to unpaid interest accrued in each preceding taxable year. The amount of the net negative adjustment applied to accrued but unpaid interest is translated into functional currency at the same rate used, in each of the respective prior taxable years, to translate the accrued interest.
(3) Any amount of the net negative adjustment remaining after the application of paragraphs (b)(3)(ii)(B)(1) and (2) of this section is attributable to interest accrued and paid in prior taxable years. The amount of the net negative adjustment applied to such amounts is translated into functional currency at the spot rate on the date the debt instrument was issued or, if later, acquired.
(4) Any amount of the net negative adjustment remaining after application of paragraphs (b)(3)(ii)(B)(1 ), (2) and (3) of this section is a negative adjustment carryforward, within the meaning of § 1.1275-4(b)(6)(iii)(C). A negative adjustment carryforward is carried forward in the denomination currency and is applied to reduce interest accruals in subsequent years. In the year in which the instrument is sold, exchanged or retired, any negative adjustment carryforward not applied to interest reduces the holder's amount realized on the instrument (in the denomination currency). An issuer of a debt instrument described in paragraph (a)(1)(i) of this section who takes into income a negative adjustment carryforward (that is not applied to interest) in the year the instrument is retired, as described in § 1.1275-4(b)(6)(iii)(C), translates such income into functional currency at the spot rate on the date the instrument was issued.
(iii) Adjusted basis— (A) In general. Except as otherwise provided in this paragraph and paragraph (b)(7) or (8) of this section, a holder determines and maintains adjusted basis by translating the denomination currency amounts determined under § 1.1275-4(b)(7)(iii) into functional currency as follows:
(1) The holder's initial basis in the instrument is determined by translating the amount paid by the holder to acquire the instrument (in the denomination currency) into functional currency at the spot rate on the date the instrument was issued or, if later, acquired.
(2) An increase in basis attributable to interest accrued on the instrument is translated at the rate applicable to such interest under paragraph (b)(3)(i) of this section.
(3) Any noncontingent payment and the projected amount of any contingent payments determined in the denomination currency that decrease the holder's basis in the instrument under § 1.1275-4(b)(7)(iii) are translated as follows:
(i) The payment first is attributable to the most recently accrued interest to which prior amounts have not already been attributed. The payment is translated into functional currency at the rate at which the interest was accrued.
(ii) Any amount remaining after the application of paragraph (b)(3)(iii)(A)(3 )(i) of this section is attributable to principal. Such amounts are translated into functional currency at the spot rate on the date the instrument was issued or, if later, acquired.
(B) Exception for interest reduced by a negative adjustment carryforward. Solely for purposes of this § 1.988-6, any amounts of accrued interest income that are reduced as a result of a negative adjustment carryforward shall be treated as principal and translated at the spot rate on the date the instrument was issued or, if later, acquired.
(iv) Amount realized— (A) Instrument held to maturity— (1) In general. With respect to an instrument held to maturity, a holder translates the amount realized by separating such amount in the denomination currency into the component parts of interest and principal that make up adjusted basis prior to translation under paragraph (b)(3)(iii) of this section, and translating each of those component parts of the amount realized at the same rate used to translate the respective component parts of basis under paragraph (b)(3)(iii) of this section. The amount realized first shall be translated by reference to the component parts of basis consisting of accrued interest during the taxpayer's holding period as determined under paragraph (b)(3)(iii) of this section and ordering such amounts on a last in first out basis. Any remaining portion of the amount realized shall be translated by reference to the rate used to translate the component of basis consisting of principal as determined under paragraph (b)(3)(iii) of this section.
(2) Subsequent purchases at discount and fixed but deferred contingent payments. For purposes of this paragraph (b)(3)(iv) of this section, any amount which is required to be added to adjusted basis under paragraph (b)(7) or (8) of this section shall be treated as additional interest which was accrued on the date the amount was added to adjusted basis. To the extent included in amount realized, such amounts shall be translated into functional currency at the same rates at which they were translated for purposes of determining adjusted basis. See paragraphs (b)(7)(iv) and (b)(8) of this section for rules governing the rates at which the amounts are translated for purposes of determining adjusted basis.
(B) Sale, exchange, or unscheduled retirement— (1) Holder. In the case of a sale, exchange, or unscheduled retirement, application of the rule stated in paragraph (b)(3)(iv)(A) of this section shall be as follows. The holder's amount realized first shall be translated by reference to the principal component of basis as determined under paragraph (b)(3)(iii) of this section, and then to the component of basis consisting of accrued interest as determined under paragraph (b)(3)(iii) of this section and ordering such amounts on a first in first out basis. Any gain recognized by the holder (i.e., any excess of the sale price over the holder's basis, both expressed in the denomination currency) is translated into functional currency at the spot rate on the payment date.
(2) Issuer. In the case of an unscheduled retirement of the debt instrument, any excess of the adjusted issue price of the debt instrument over the amount paid by the issuer (expressed in denomination currency) shall first be attributable to accrued unpaid interest, to the extent the accrued unpaid interest had not been previously offset by a negative adjustment, on a last-in-first-out basis, and then to principal. The accrued unpaid interest shall be translated into functional currency at the rate at which the interest was accrued. The principal shall be translated at the spot rate on the date the debt instrument was issued.
(C) Effect of negative adjustment carryforward with respect to the issuer. Any amount of negative adjustment carryforward treated as ordinary income under § 1.1275-4(b)(6)(iii)(C) shall be translated at the exchange rate on the day the debt instrument was issued.
(4) Determination of gain or loss not attributable to foreign currency. A holder of a debt instrument described in paragraph (a)(1)(i) of this section shall recognize gain or loss upon sale, exchange, or retirement of the instrument equal to the difference between the amount realized with respect to the instrument, translated into functional currency as described in paragraph (b)(3)(iv) of this section, and the adjusted basis in the instrument, determined and maintained in functional currency as described in paragraph (b)(3)(iii) of this section. The amount of any gain or loss so determined is characterized as provided in § 1.1275-4(b)(8), and sourced as provided in paragraph (b)(6) of this section.
(5) Determination of foreign currency gain or loss— (i) In general. Other than in a taxable disposition of the debt instrument, foreign currency gain or loss is recognized with respect to a debt instrument described in paragraph (a)(1)(i) of this section only when payments are made or received. No foreign currency gain or loss is recognized with respect to a net positive or negative adjustment, as determined under paragraph (b)(2)(ii) of this section (except with respect to a positive adjustment described in paragraph (b)(8) of this section). As described in this paragraph (b)(5), foreign currency gain or loss is determined in accordance with the rules of § 1.988-2(b).
(ii) Foreign currency gain or loss attributable to accrued interest. The amount of foreign currency gain or loss recognized with respect to payments of interest previously accrued on the instrument is determined by translating the amount of interest paid or received into functional currency at the spot rate on the date of payment and subtracting from such amount the amount determined by translating the interest paid or received into functional currency at the rate at which such interest was accrued under the rules of paragraph (b)(3)(i) of this section. For purposes of this paragraph, the amount of any payment that is treated as accrued interest shall be reduced by the amount of any net negative adjustment treated as ordinary loss (to the holder) or ordinary income (to the issuer), as provided in paragraph (b)(2)(ii) of this section. For purposes of determining whether the payment consists of interest or principal, see the payment ordering rules in paragraph (b)(5)(iv) of this section.
(iii) Principal. The amount of foreign currency gain or loss recognized with respect to payment or receipt of principal is determined by translating the amount paid or received into functional currency at the spot rate on the date of payment or receipt and subtracting from such amount the amount determined by translating the principal into functional currency at the spot rate on the date the instrument was issued or, in case of the holder, if later, acquired. For purposes of determining whether the payment consists of interest or principal, see the payment ordering rules in paragraph (b)(5)(iv) of this section.
(iv) Payment ordering rules— (A) In general. Except as provided in paragraph (b)(5)(iv)(B) of this section, payments with respect to an instrument described in paragraph (a)(1)(i) of this section shall be treated as follows:
(1) A payment shall first be attributable to any net positive adjustment on the instrument that has not previously been taken into account.
(2) Any amount remaining after applying paragraph (b)(5)(iv)(A)(1) of this section shall be attributable to accrued but unpaid interest, remaining after reduction by any net negative adjustment, and shall be attributable to the most recent accrual period to the extent prior amounts have not already been attributed to such period.
(3) Any amount remaining after applying paragraphs (b)(5)(iv)(A)(1) and (2) of this section shall be attributable to principal. Any interest paid in the current year that is reduced by a net negative adjustment shall be considered a payment of principal for purposes of determining foreign currency gain or loss.
(B) Special rule for sale or exchange or unscheduled retirement. Payments made or received upon a sale or exchange or unscheduled retirement shall first be applied against the principal of the debt instrument (or in the case of a subsequent purchaser, the purchase price of the instrument in denomination currency) and then against accrued unpaid interest (in the case of a holder, accrued while the holder held the instrument).
(C) Subsequent purchaser that has a positive adjustment allocated to a daily portion of interest. A positive adjustment that is allocated to a daily portion of interest pursuant to paragraph (b)(7)(iv) of this section shall be treated as interest for purposes of applying the payment ordering rule of this paragraph (b)(5)(iv).
(6) Source of gain or loss. The source of foreign currency gain or loss recognized with respect to an instrument described in paragraph (a)(1)(i) of this section shall be determined pursuant to § 1.988-4. Consistent with the rules of § 1.1275-4(b)(8), all gain (other than foreign currency gain) on an instrument described in paragraph (a)(1)(i) of this section is treated as interest income for all purposes. The source of an ordinary loss (other than foreign currency loss) with respect to an instrument described in paragraph (a)(1)(i) of this section shall be determined pursuant to § 1.1275-4(b)(9)(iv). The source of a capital loss with respect to an instrument described in paragraph (a)(1)(i) of this section shall be determined pursuant to § 1.865-1(b)(2).
(7) Basis different from adjusted issue price— (i) In general. The rules of § 1.1275-4(b)(9)(i), except as set forth in this paragraph (b)(7), shall apply to an instrument described in paragraph (a)(1)(i) of this section purchased by a subsequent holder for more or less than the instrument's adjusted issue price.
(ii) Determination of basis. If an instrument described in paragraph (a)(1)(i) of this section is purchased by a subsequent holder, the subsequent holder's initial basis in the instrument shall equal the amount paid by the holder to acquire the instrument, translated into functional currency at the spot rate on the date of acquisition.
(iii) Purchase price greater than adjusted issue price. If the purchase price of the instrument (determined in the denomination currency) exceeds the adjusted issue price of the instrument, the holder shall, consistent with the rules of § 1.1275-4(b)(9)(i)(B), reasonably allocate such excess to the daily portions of interest accrued on the instrument or to a projected payment on the instrument. To the extent attributable to interest, the excess shall be reasonably allocated over the remaining term of the instrument to the daily portions of interest accrued and shall be a negative adjustment on the dates the daily portions accrue. On the date of such adjustment, the holder's adjusted basis in the instrument is reduced by the amount treated as a negative adjustment under this paragraph (b)(7)(iii), translated into functional currency at the rate used to translate the interest which is offset by the negative adjustment. To the extent related to a projected payment, such excess shall be treated as a negative adjustment on the date the payment is made. On the date of such adjustment, the holder's adjusted basis in the instrument is reduced by the amount treated as a negative adjustment under this paragraph (b)(7)(iii), translated into functional currency at the spot rate on the date the instrument was acquired.
(iv) Purchase price less than adjusted issue price. If the purchase price of the instrument (determined in the denomination currency) is less than the adjusted issue price of the instrument, the holder shall, consistent with the rules of § 1.1275-4(b)(9)(i)(C), reasonably allocate the difference to the daily portions of interest accrued on the instrument or to a projected payment on the instrument. To the extent attributable to interest, the difference shall be reasonably allocated over the remaining term of the instrument to the daily portions of interest accrued and shall be a positive adjustment on the dates the daily portions accrue. On the date of such adjustment, the holder's adjusted basis in the instrument is increased by the amount treated as a positive adjustment under this paragraph (b)(7)(iv), translated into functional currency at the rate used to translate the interest to which it relates. For purposes of determining adjusted basis under paragraph (b)(3)(iii) of this section, such increase in adjusted basis shall be treated as an additional accrual of interest during the period to which the positive adjustment relates. To the extent related to a projected payment, such difference shall be treated as a positive adjustment on the date the payment is made. On the date of such adjustment, the holder's adjusted basis in the instrument is increased by the amount treated as a positive adjustment under this paragraph (b)(7)(iv), translated into functional currency at the spot rate on the date the adjustment is taken into account. For purposes of determining the amount realized on the instrument in functional currency under paragraph (b)(3)(iv) of this section, amounts attributable to the excess of the adjusted issue price of the instrument over the purchase price of the instrument shall be translated into functional currency at the same rate at which the corresponding adjustments are taken into account under this paragraph (b)(7)(iv) for purposes of determining the adjusted basis of the instrument.
(8) Fixed but deferred contingent payments. In the case of an instrument with a contingent payment that becomes fixed as to amount before the payment is due, the rules of § 1.1275-4(b)(9)(ii) shall be applied in the denomination currency of the instrument. For this purpose, foreign currency gain or loss shall be recognized on the date payment is made or received with respect to the instrument under the principles of paragraph (b)(5) of this section. Any increase or decrease in basis required under § 1.1275-4(b)(9)(ii)(D) shall be taken into account at the same exchange rate as the corresponding net positive or negative adjustment is taken into account.
(c) Examples. The provisions of paragraph (b) of this section may be illustrated by the following examples. In each example, assume that the instrument described is a debt instrument for federal income tax purposes. No inference is intended, however, as to whether the instrument is a debt instrument for federal income tax purposes. The examples are as follows:

Code of Federal Regulations

Example 1. Treatment of net positive adjustment—(i) Facts. On December 31, 2004, Z, a calendar year U.S. resident taxpayer whose functional currency is the U.S. dollar, purchases from a foreign corporation, at original issue, a zero-coupon debt instrument with a non-currency contingency for £1000. All payments of principal and interest with respect to the instrument are denominated in, or determined by reference to, a single nonfunctional currency (the British pound). The debt instrument would be subject to § 1.1275-4(b) if it were denominated in dollars. The debt instrument's comparable yield, determined in British pounds under paragraph (b)(2)(i) of this section and § 1.1275-4(b) , is 10 percent, compounded annually, and the projected payment schedule, as constructed under the rules of § 1.1275-4(b) , provides for a single payment of £1210 on December 31, 2006 (consisting of a noncontingent payment of £975 and a projected payment of £235). The debt instrument is a capital asset in the hands of Z. Z does not elect to use the spot-rate convention described in § 1.988-2(b)(2)(iii)(B) . The payment actually made on December 31, 2006, is £1300. The relevant pound/dollar spot rates over the term of the instrument are as follows:
Code of Federal Regulations 666
Date Spot rate(pounds to dollars)
Dec. 31, 2004 £1.00 = $1.00
Dec. 31, 2005 £1.00 = $1.10
Dec. 31, 2006 £1.00 = $1.20
Accrual period Average rate(pounds to dollars)
2005 £1.00 = $1.05
2006 £1.00 = $1.15
(ii) Treatment in 2005—(A) Determination of accrued interest. Under paragraph (b)(2)(i) of this section, and based on the comparable yield, Z accrues £100 of interest on the debt instrument for 2005 (issue price of £1000 × 10 percent). Under paragraph (b)(3)(i) of this section, Z translates the £100 at the average exchange rate for the accrual period ($1.05 × £100 = $105). Accordingly, Z has interest income in 2005 of $105. (B) Adjusted issue price and basis. Under paragraphs (b)(2)(iii) and (iv) of this section, the adjusted issue price of the debt instrument determined in pounds and Z's adjusted basis in dollars in the debt instrument are increased by the interest accrued in 2005. Thus, on January 1, 2006, the adjusted issue price of the debt instrument is £1100. For purposes of determining Z's dollar basis in the debt instrument, the $1000 basis ($1.00 × £1000 original cost basis) is increased by the £100 of accrued interest, translated at the rate at which interest was accrued for 2005. See paragraph (b)(3)(iii) of this section. Accordingly, Z's adjusted basis in the debt instrument as of January 1, 2006, is $1105. (iii) Treatment in 2006—(A) Determination of accrued interest. Under paragraph (b)(2)(i) of this section, and based on the comparable yield, Z accrues £110 of interest on the debt instrument for 2006 (adjusted issue price of £1100 × 10 percent). Under paragraph (b)(3)(i) of this section, Z translates the £110 at the average exchange rate for the accrual period ($1.15 × £110 = $126.50). Accordingly, Z has interest income in 2006 of $126.50. (B) Effect of net positive adjustment. The payment actually made on December 31, 2006, is £1300, rather than the projected £1210. Under paragraph (b)(2)(ii) of this section, Z has a net positive adjustment of £90 on December 31, 2006, attributable to the difference between the amount of the actual payment and the amount of the projected payment. Under paragraph (b)(3)(ii)(A) of this section, the £90 net positive adjustment is treated as additional interest income and is translated into dollars at the spot rate on the last day of the year ($1.20 × £90 = $108). Accordingly, Z has a net positive adjustment of $108 resulting in a total interest inclusion for 2006 of $234.50 ($126.50 $108 = $234.50). (C) Adjusted issue price and basis. Based on the projected payment schedule, the adjusted issue price of the debt instrument immediately before the payment at maturity is £1210 (£1100 plus £110 of accrued interest for 2006). Z's adjusted basis in dollars, based only on the noncontingent payment and the projected amount of the contingent payment to be received, is $1231.50 ($1105 plus $126.50 of accrued interest for 2006). (D) Amount realized. Even though Z receives £1300 at maturity, for purposes of determining the amount realized, Z is treated under paragraph (b)(2)(v) of this section as receiving the projected amount of the contingent payment on December 31, 2006. Therefore, Z is treated as receiving £1210 on December 31, 2006. Under paragraph (b)(3)(iv) of this section, Z translates its amount realized into dollars and computes its gain or loss on the instrument (other than foreign currency gain or loss) by breaking the amount realized into its component parts. Accordingly, £100 of the £1210 (representing the interest accrued in 2005) is translated at the rate at which it was accrued (£1 = $1.05), resulting in an amount realized of $105; £110 of the £1210 (representing the interest accrued in 2006) is translated into dollars at the rate at which it was accrued (£1 = $1.15), resulting in an amount realized of $126.50; and £1000 of the £1210 (representing a return of principal) is translated into dollars at the spot rate on the date the instrument was purchased (£1 = $1), resulting in an amount realized of $1000. Z's total amount realized is $1231.50, the same as its basis, and Z recognizes no gain or loss (before consideration of foreign currency gain or loss) on retirement of the instrument. (E) Foreign currency gain or loss. Under paragraph (b)(5) of this section Z recognizes foreign currency gain under section 988 on the instrument with respect to the consideration actually received at maturity (except for the net positive adjustment), £1210. The amount of recognized foreign currency gain is determined based on the difference between the spot rate on the date the instrument matures and the rates at which the principal and interest were taken into account. With respect to the portion of the payment attributable to interest accrued in 2005, the foreign currency gain is $15 [£100 × ($1.20−$1.05)]. With respect to interest accrued in 2006, the foreign currency gain equals $5.50 [£110 × ($1.20−$1.15)]. With respect to principal, the foreign currency gain is $200 [£1000 × ($1.20−$1.00)]. Thus, Z recognizes a total foreign currency gain on December 31, 2006, of $220.50. (F) Source. Z has interest income of $105 in 2005, interest income of $234.50 in 2006 (attributable to £110 of accrued interest and the £90 net positive adjustment), and a foreign currency gain of $220.50 in 2006. Under paragraph (b)(6) of this section and section 862(a)(1), the interest income is sourced by reference to the residence of the payor and is therefore from sources without the United States. Under paragraph (b)(6) of this section and § 1.988-4 , Z's foreign currency gain of $220.50 is sourced by reference to Z's residence and is therefore from sources within the United States.
Code of Federal Regulations 667

Code of Federal Regulations

Example 2. Treatment of net negative adjustment. (i) Facts. Assume the same facts as in Example 1, except that Z receives £975 at maturity instead of £1300. (ii) Treatment in 2005. The treatment of the debt instrument in 2005 is the same as in Example 1. Thus, Z has interest income in 2005 of $105. On January 1, 2006, the adjusted issue price of the debt instrument is £1100, and Z's adjusted basis in the instrument is $1105. (iii) Treatment in 2006—(A) Determination of accrued interest. Under paragraph (b)(2)(i) of this section and based on the comparable yield, Z's accrued interest for 2006 is £110 (adjusted issue price of £1100 × 10 percent). Under paragraph (b)(3)(i) of this section, the £110 of accrued interest is translated at the average exchange rate for the accrual period ($1.15 × £110 = $126.50). (B) Effect of net negative adjustment. The payment actually made on December 31, 2006, is £975, rather than the projected £1210. Under paragraph (b)(2)(ii) of this section, Z has a net negative adjustment of £235 on December 31, 2006, attributable to the difference between the amount of the actual payment and the amount of the projected payment. Z's accrued interest income of £110 in 2006 is reduced to zero by the net negative adjustment. Under paragraph (b)(3)(ii)(B)(1) of this section the net negative adjustment which reduces the current year's interest is not translated into functional currency. Under paragraph (b)(2)(ii) of this section, Z treats the remaining £125 net negative adjustment as an ordinary loss to the extent of the £100 previously accrued interest in 2005. This £100 ordinary loss is attributable to interest accrued but not paid in the preceding year. Therefore, under paragraph (b)(3)(ii)(B)(2) of this section, Z translates the loss into dollars at the average rate for such year (£1 = $1.05). Accordingly, Z has an ordinary loss of $105 in 2006. The remaining £25 of net negative adjustment is a negative adjustment carryforward under paragraph (b)(2)(ii) of this section. (C) Adjusted issue price and basis. Based on the projected payment schedule, the adjusted issue price of the debt instrument immediately before the payment at maturity is £1210 (£1100 plus £110 of accrued interest for 2006). Z's adjusted basis in dollars, based only on the noncontingent payments and the projected amount of the contingent payments to be received, is $1231.50 ($1105 plus $126.50 of accrued interest for 2006). (D) Amount realized. Even though Z receives £975 at maturity, for purposes of determining the amount realized, Z is treated under paragraph (b)(2)(v) of this section as receiving the projected amount of the contingent payment on December 31, 2006, reduced by the amount of Z's negative adjustment carryforward of £25. Therefore, Z is treated as receiving £1185 (£1210−£25) on December 31, 2006. Under paragraph (b)(3)(iv) of this section, Z translates its amount realized into dollars and computes its gain or loss on the instrument (other than foreign currency gain or loss) by breaking the amount realized into its component parts. Accordingly, £100 of the £1185 (representing the interest accrued in 2005) is translated at the rate at which it was accrued (£1 = $1.05), resulting in an amount realized of $105; £110 of the £1185 (representing the interest accrued in 2006) is translated into dollars at the rate at which it was accrued (£1 = $1.15), resulting in an amount realized of $126.50; and £975 of the £1185 (representing a return of principal) is translated into dollars at the spot rate on the date the instrument was purchased (£1 = $1), resulting in an amount realized of $975. Z's amount realized is $1206.50 ($105 $126.50 $975 = $1206.50), and Z recognizes a capital loss (before consideration of foreign currency gain or loss) of $25 on retirement of the instrument ($1206.50−$1231.50 = −$25). (E) Foreign currency gain or loss. Z recognizes foreign currency gain with respect to the consideration actually received at maturity, £975. Under paragraph (b)(5)(ii) of this section, no foreign currency gain or loss is recognized with respect to unpaid accrued interest reduced to zero by the net negative adjustment resulting in 2006. In addition, no foreign currency gain or loss is recognized with respect to unpaid accrued interest from 2005, also reduced to zero by the ordinary loss. Accordingly, Z recognizes foreign currency gain with respect to principal only. Thus, Z recognizes a total foreign currency gain on December 31, 2006, of $195 [£975 × ($1.20−$1.00)]. (F) Source. In 2006, Z has an ordinary loss of $105, a capital loss of $25, and a foreign currency gain of $195. Under paragraph (b)(6) of this section and § 1.1275-4(b)(9)(iv) , the $105 ordinary loss generally reduces Z's foreign source passive income under section 904(d) and the regulations thereunder. Under paragraph (b)(6) of this section and § 1.865-1(b)(2) , the $25 capital loss is sourced by reference to how interest income on the instrument would have been sourced. Therefore, the $25 capital loss generally reduces Z's foreign source passive income under section 904(d) and the regulations thereunder. Under paragraph (b)(6) of this section and § 1.988-4 , Z's foreign currency gain of $195 is sourced by reference to Z's residence and is therefore from sources within the United States.

Code of Federal Regulations

Example 3. Negative adjustment and periodic interest payments—(i) Facts. On December 31, 2004, Z, a calendar year U.S. resident taxpayer whose functional currency is the U.S. dollar, purchases from a foreign corporation, at original issue, a two-year debt instrument with a non-currency contingency for £1000. All payments of principal and interest with respect to the instrument are denominated in, or determined by reference to, a single nonfunctional currency (the British pound). The debt instrument would be subject to § 1.1275-4(b) if it were denominated in dollars. The debt instrument's comparable yield, determined in British pounds under §§ 1.988-2(b)(2) and 1.1275-4(b) , is 10 percent, compounded semiannually. The debt instrument provides for semiannual interest payments of £30 payable each June 30, and December 31, and a contingent payment at maturity on December 31, 2006, which is projected to equal £1086.20 (consisting of a noncontingent payment of £980 and a projected payment of £106.20) in addition to the interest payable at maturity. The debt instrument is a capital asset in the hands of Z. Z does not elect to use the spot-rate convention described in § 1.988-2(b)(2)(iii)(B) . The payment actually made on December 31, 2006, is £981.00. The relevant pound/dollar spot rates over the term of the instrument are as follows:
Code of Federal Regulations 668
Date Spot rate(pounds to dollars)
Dec. 31, 2004 £1.00 = $1.00
June 30, 2005 £1.00 = $1.20
Dec. 31, 2005 £1.00 = $1.40
June 30, 2006 £1.00 = $1.60
Dec. 31, 2006 £1.00 = $1.80
Accrual period Average rate(pounds to dollars)
Jan.-June 2005 £1.00 = $1.10
July-Dec. 2005 £1.00 = $1.30
Jan.-June 2006 £1.00 = $1.50
July-Dec. 2006 £1.00 = $1.70
(ii) Treatment in 2005—(A) Determination of accrued interest. Under paragraph (b)(2)(i) of this section, and based on the comparable yield, Z accrues £50 of interest on the debt instrument for the January-June accrual period (issue price of £1000 × 10 percent/2). Under paragraph (b)(3)(i) of this section, Z translates the £50 at the average exchange rate for the accrual period ($1.10 × £50 = $55.00). Similarly, Z accrues £51 of interest in the July-December accrual period [(£1000 £50−£30) × 10 percent/2], which is translated at the average exchange rate for the accrual period ($1.30 × £51 = $66.30). Accordingly, Z accrues $121.30 of interest income in 2005. (B) Adjusted issue price and basis—(1) January-June accrua