The paper introduces a connection between the needs of exchanges to respond to the immediacy needs of their clientele and the need to manage the credit risks faced by exchange members. Queueing theory is used to represent the opportunity loss suffered by brokers engaging in multiple activities:...

Defining futures contracts as substitutes for associated cash transactions enables a discussion of the evolution of controls over contract nonperformance risk. These controls are incorporated into exchange methods for clearing contracts. Three clearing methods are discussed: direct, ringing and...