(2) Applicability. This section applies to exposures for which:

1. (i) Credit risk is fully covered by an eligible guarantee or eligible credit derivative; or
2. (ii) Credit risk is covered on a pro rata basis (that is, on a basis in which the Enterprise and the protection provider share losses proportionately) by an eligible guarantee or eligible credit derivative.

(b) Rules of recognition.

1. (1) An Enterprise may only recognize the credit risk mitigation benefits of eligible guarantees and eligible credit derivatives.

2. (2) An Enterprise may only recognize the credit risk mitigation benefits of an eligible credit derivative to hedge an exposure that is different from the credit derivative's reference exposure used for determining the derivative's cash settlement value, deliverable obligation, or occurrence of a credit event if:

   1. (i) The reference exposure ranks pari passu with, or is subordinated to, the hedged exposure; and
   2. (ii) The reference exposure and the hedged exposure are to the same legal entity, and legally enforceable cross-default or cross-acceleration clauses are in place to ensure payments under the credit derivative are triggered when the obligated party of the hedged exposure fails to pay under the terms of the hedged exposure.

(2) Partial coverage. If an eligible guarantee or eligible credit derivative meets the conditions in paragraphs (a) and (b) of this section and the protection amount (P) of the guarantee or credit derivative is less than the exposure amount of the hedged exposure, the Enterprise must treat the hedged exposure as two separate exposures (protected and unprotected) in order to recognize the credit risk mitigation benefit of the guarantee or credit derivative.

1. (i) The Enterprise may calculate the risk-weighted asset amount for the protected exposure under this subpart D, where the applicable risk weight is the risk weight applicable to the guarantor or credit derivative protection provider.
2. (ii) The Enterprise must calculate the risk-weighted asset amount for the unprotected exposure under this subpart D, where the applicable risk weight is that of the unprotected portion of the hedged exposure.
3. (iii) The treatment provided in this section is applicable when the credit risk of an exposure is covered on a partial pro rata basis and may be applicable when an adjustment is made to the effective notional amount of the guarantee or credit derivative under paragraph (d), (e), or (f) of this section.
4. (d) Maturity mismatch adjustment.
5. (1) An Enterprise that recognizes an eligible guarantee or eligible credit derivative in determining the risk-weighted asset amount for a hedged exposure must adjust the effective notional amount of the credit risk mitigant to reflect any maturity mismatch between the hedged exposure and the credit risk mitigant.
6. (2) A maturity mismatch occurs when the residual maturity of a credit risk mitigant is less than that of the hedged exposure(s).
7. (3) The residual maturity of a hedged exposure is the longest possible remaining time before the obligated party of the hedged exposure is scheduled to fulfil its obligation on the hedged exposure. If a credit risk mitigant has embedded options that may reduce its term, the Enterprise (protection purchaser) must use the shortest possible residual maturity for the credit risk mitigant. If a call is at the discretion of the protection provider, the residual maturity of the credit risk mitigant is at the first call date. If the call is at the discretion of the Enterprise (protection purchaser), but the terms of the arrangement at origination of the credit risk mitigant contain a positive incentive for the Enterprise to call the transaction before contractual maturity, the remaining time to the first call date is the residual maturity of the credit risk mitigant.
8. (4) A credit risk mitigant with a maturity mismatch may be recognized only if its original maturity is greater than or equal to one year and its residual maturity is greater than three months.

9. (5) When a maturity mismatch exists, the Enterprise must apply the following adjustment to reduce the effective notional amount of the credit risk mitigant: Pm = E × (t−0.25)/(T−0.25), where:

   1. (i) Pm = effective notional amount of the credit risk mitigant, adjusted for maturity mismatch;
   2. (ii) E = effective notional amount of the credit risk mitigant;
   3. (iii) t = the lesser of T or the residual maturity of the credit risk mitigant, expressed in years; and
   4. (iv) T = the lesser of five or the residual maturity of the hedged exposure, expressed in years.

   5. (e) Adjustment for credit derivatives without restructuring as a credit event. If an Enterprise recognizes an eligible credit derivative that does not include as a credit event a restructuring of the hedged exposure involving forgiveness or postponement of principal, interest, or fees that results in a credit loss event (that is, a charge-off, specific provision, or other similar debit to the profit and loss account), the Enterprise must apply the following adjustment to reduce the effective notional amount of the credit derivative: Pr = Pm × 0.60, where:

      1. (1) Pr = effective notional amount of the credit risk mitigant, adjusted for lack of restructuring event (and maturity mismatch, if applicable); and
      2. (2) Pm = effective notional amount of the credit risk mitigant (adjusted for maturity mismatch, if applicable).

   6. (f) Currency mismatch adjustment.

      1. (1) If an Enterprise recognizes an eligible guarantee or eligible credit derivative that is denominated in a currency different from that in which the hedged exposure is denominated, the Enterprise must apply the following formula to the effective notional amount of the guarantee or credit derivative: Pc = Pr × (1−HFX), where:

         1. (i) Pc = effective notional amount of the credit risk mitigant, adjusted for currency mismatch (and maturity mismatch and lack of restructuring event, if applicable);
         2. (ii) Pr = effective notional amount of the credit risk mitigant (adjusted for maturity mismatch and lack of restructuring event, if applicable); and
         3. (iii) HFX = haircut appropriate for the currency mismatch between the credit risk mitigant and the hedged exposure.
      2. (2) An Enterprise must set HFX equal to eight percent unless it qualifies for the use of and uses its own internal estimates of foreign exchange volatility based on a ten-business-day holding period. An Enterprise qualifies for the use of its own internal estimates of foreign exchange volatility if it qualifies for the use of its own-estimates haircuts in § 1240.39(c)(4).

      3. (3) An Enterprise must adjust HFX calculated in paragraph (f)(2) of this section upward if the Enterprise revalues the guarantee or credit derivative less frequently than once every 10 business days using the following square root of time formula:

         

         where TM equals the greater of 10 or the number of days between revaluation.