This document discusses concerns about the use of big data in consumer credit scoring. It summarizes a study conducted by the National Consumer Law Center that found significant inaccuracies in consumer data reports from several big data brokers. The document also analyzes whether big data scoring complies with laws like the Fair Credit Reporting Act and could result in discriminatory impacts. Finally, it reviews loan products using big data underwriting and finds that they fail to provide genuinely affordable alternatives to payday loans. Overall, the document concludes that big data has not lived up to its promise to expand access to credit for underserved consumers in a fair, accurate and beneficial way.