Abstract: The system and methods disclosed herein are directed to valuing, comparing, and projecting mortgage loan portfolios based on residential real estate. The disclosed system enables portfolio managers to efficiently and accurately evaluate mortgage loan portfolios based on residential real estate. In one embodiment, a user can run detailed scenarios and then review comprehensive results of scenario runs using interactive tabs. The user can modify scenarios, assumptions, and individual parameters on the fly. The system provides aggregated information about a selected portfolio, as well as loan level information, from the same application.