Hull, John, "Assessing Credit Risk in a Financial Institution's Off-Balance Sheet Commitments", Journal of Financial and Quantitative Analysis, Vol. 24, No. 4, (December 1989), pp. 489-501.
Abstract: The first part of this paper presents a general approach to valuing a financial institution's contracts hen there is credit risk. The approach uses contingent claims pricing theory and is particularly appropriate for an off-balance sheet contract, such as a swap, that can have either a positive or a negative value to the counterparty. The second part of the paper extends the analysis by considering the problem, faced by bank supervisory authorities, of determining capital requirements for off-balance sheet contracts.