Institutionalizing explainability in credit scoring

Machine learning credit scoring expands the informational frontier of retail lending, particularly for thin file borrowers, yet it also erodes the practical meaning of disclosure duties that anchor consumer protection and prudential oversight. The central financial implication is that explainability is no longer a peripheral communication task. It is a market structuring variable that can reshape access, pricing efficiency, competition, and the distribution of compliance burdens across incumbents and challengers. The central regulatory gap is that current regimes articulate rights and obligations but remain under specified on what constitutes a sufficient explanation, how fidelity can be verified, and how opportunistic framing can be prevented when explanation techniques permit multiple plausible narratives. The most effective policy response is institutional rather than purely technical, achieved by creating a governed intermediary layer that can translate proprietary model behavior into standardized consumer facing and supervisor facing disclosures while preserving legitimate confidentiality.