Calculation of Capital Requirement Employing the Standard Supervisory Haircuts
CA-4.7.36
For a collateralised transaction, the exposure amount after risk mitigation is calculated as follows:
E* = max {0, [E x (1 + He) - C x (1 - Hc - Hfx)]}
where:
E* = the exposure value after risk mitigation
E = current value of the exposure
He = haircut appropriate to the exposure
C = the current value of the collateral received
Hc = haircut appropriate to the collateral
Hfx = haircut appropriate for currency mismatch between the collateral and exposureApr 08CA-4.7.37
The exposure amount after risk mitigation will be multiplied by the risk weight of the counterparty to obtain the risk-weighted asset amount for the collateralised transaction. The treatment for transactions where there is a mismatch between the maturity of the counterparty exposure and the collateral is given in paragraphs CA-4.7.47 to CA-4.7.50.
Apr 08CA-4.7.38
Where the collateral is a basket of assets, the haircut on the basket will be H = Σi ai Hi, where ai is the weight of the asset (as measured by units of currency) in the i basket and Hi the haircut applicable to that asset.
Apr 08