Riskless contingent order matching

摘要

A computer-implemented method of matching orders comprising: defining a first order for a first item; defining a second order for a second item; defining at least one condition applicable to combined execution of the first and second orders; wherein the at least one condition sets forth a required proportionality measure as between the first order and the second orders; defining a prioritization of first and second orders; and submitting to an electronic marketplace at most one at a time of a new order of only an item of the first order or only an item of the second order: wherein execution of both the first order and the second order meets the conditions applicable to the execution of the first and second orders; and wherein execution of both the first order and the and second order is contingent upon the execution of the at least one order submitted over the electronic marketplace.