Abstract: A system for creating and managing securities that evaluates the cash flows of mortgage securities that are to be restructured into new securities. The securities to be restructured can be either mortgage securities that qualify as collateral for a CMO/REMIC or securities that were issued by an existing CMO/REMIC. Based upon the original mortgage securities, the system may create four new securities: two each that have principal-only cash flows and two each that have interest-only cash flows.