Risk Components for Corporate, Sovereign and Bank Exposures

A bank relying on own-estimates of LGD has the option to adopt the treatment outlined in paragraphs 12.23 to 12.26 above for banks under the F-IRB approach, or to make an adjustment to its LGD estimate of the exposure to reflect the presence of the guarantee or credit derivative. Under this option, there are no limits to the range of eligible guarantors although the set of minimum requirements provided in paragraphs 16.103 to 16.104 the type of guarantee must be satisfied. For credit derivatives, the requirements of paragraphs 16.109 to 16.110 must be satisfied 57 . For exposures for which a bank has permission to use its own estimates of LGD, the bank may recognize the risk mitigating effects of first-to-default credit derivatives, but may not recognize the risk mitigating effects of second-to-default or more generally nth-to-default credit derivatives. Exposure at default (EAD) 12.29 The following sections apply to both on and off-balance sheet positions. All exposures are measured gross of specific provisions or partial write-offs. The EAD on drawn amounts should not be less than the sum of: (i) the amount by which a bank’s regulatory capital would be reduced if the exposure were written-off fully; and (ii) any specific provisions and partial write-offs. When the difference between the instrument’s EAD and the sum of (i) and (ii) is positive, this amount is termed a discount. The calculation of risk-weighted assets is independent of any discounts. Under the limited circumstances described in paragraph 15.4 , discounts may be included in the measurement of total eligible provisions for purposes of the EL-provision calculation set out in chapter 15 . Exposure measurement for on-balance sheet items 12.30 On-balance sheet netting of loans and deposits will be recognized subject to the same conditions as under paragraph 9.67 of the standardized approach. Where currency or maturity mismatched on-balance sheet netting exists, the treatment follows the standardized approach, as set out in paragraphs 9.10 and 9.12 to 9.15 Exposure measurement for off-balance sheet items (with the exception of derivatives) 12.31 For off-balance sheet items there are two approaches for the estimation of EAD: a foundation approach and an advanced approach. When only the drawn balances of revolving facilities have been securitized, banks must ensure that they continue to hold required capital against the undrawn balances associated with the securitized exposures. 12.32 In the foundation approach, EAD is calculated as the committed but undrawn amount multiplied by a credit conversion factor (CCF). In the advanced approach, EAD for undrawn commitments may be calculated as the committed but undrawn amount multiplied by a CCF or derived from direct estimates of total facility EAD. In both the foundation approach and advanced approaches, the definition of commitments is the same as in the standardized approach, as set out in paragraph 7.86 . EAD under the foundation approach 12.33 The types of instruments and the CCFs applied to them under the F-IRB approach are the same as those in the standardized approach, as set out in paragraphs 7.86 to 7.93 . 12.34 The amount to which the CCF is applied is the lower of the value of the unused committed credit line, and the value that reflects any possible constraining of the availability of the facility, such as the existence of a ceiling on the potential lending amount which is related to a borrower’s reported cash flow. If the facility is constrained in this way, the bank must have sufficient line monitoring and management procedures to support this contention. 12.35 Where a commitment is obtained on another off-balance sheet exposure, banks under the foundation approach are to apply the lower of the applicable CCFs. EAD under the advanced approach