A system and method are disclosed for managing collateral allocation and substitution in general collateral repurchase agreements. In a preferred embodiment, an intermediary computer system facilitates the execution of anonymous general collateral repurchase agreements between buyers and sellers. The...http://www.google.com/patents/US7917427?utm_source=gb-gplus-sharePatent US7917427 - Method and system for providing rule-based collateral allocation and substitution