The potential future exposure (PFE) for derivative exposures must be calculated mathematically as follows:

For the purposes of the leverage ratio framework, the multiplier is fixed at one. Moreover, when calculating the add-on component, for all margined transactions the maturity factor set out in CA-15.3.29 below may be used. Further, as written options create an exposure to the underlying, they must be included in the leverage ratio exposure measure by applying the treatment described herein, even if certain written options are permitted the zero exposure at default (EAD) treatment allowed in the risk-based framework.