Abstract: Some embodiments disclosed herein are directed to systems and methods for assessing mortgage lender and broker compliance. The systems and methods may receive loan pricing data, underwriting data, and/or borrower data from mortgage brokers and/or lenders, reconstruct the underwriting processes performed by lenders and brokers, and monitor many aspects of these processes. The reconstructed results may then be compared to the actual results to detect potential non-compliance of laws and/or regulations, including the practice of upstreaming and/or downstreaming. Because some embodiments of the invention greatly enhance the monitoring capability of mortgage regulators, they would motivate mortgage lenders and brokers to better conform their underwriting practice to existing laws and regulations.