In various embodiments, a computerized system and method manages custody and mitigates counterparty credit risk exposure associated with a trade of a financial instrument. A custodian computer system is established that receives an initial margin payment from a pledgor and electronically posts the initial margin payment in a custody account record maintained in the database. A control agreement is established between the pledgor and a secured party with agreement details stored in the database. The dual-custody control agreement gives control of the custody account to the pledgor if the secured party defaults on trade obligations, and gives control of the custody account to the secured party if the pledgor defaults on trade obligations. During the life of the trade, the custodian may invest a current margin deposit in the custody account directly through the network into one or more investment vehicles to achieve a greater return.