银行监管的约束作用_来自监管科技的证据_79页_2mb

The Disciplining Effect of Bank Supervision: Evidence from SupTech

Introduction

This study examines the impact of bank supervision, specifically through Supervisory Technology (SupTech), on bank behavior using unique data from Brazil's Central Bank. SupTech tools aim to identify and address early risk exposures, but their role in disciplining bank risk-taking remains unclear. The research fills this gap by analyzing how supervisory scrutiny through SupTech influences lending practices and risk reporting.

Key Findings

• Effect on Risk Reporting: After SupTech events, banks reclassify more loans as non-performing and increase provisions for expected loan losses, revealing inconsistencies in risk reporting without adversely affecting financial stability or lending.
• Lending Behavior: Treated banks reduce credit supply to less creditworthy borrowers and tighten credit terms (e.g., increasing interest rates and reducing maturities for high-risk loans).
• Real-World Effects: These changes have small spillovers on the real economy, with less creditworthy firms experiencing minor reductions in employment and revenues. Non-targeted banks in the same municipality also show improved risk reporting, suggesting deterrence effects.
• Economic Mechanism: The results are primarily driven by a moral suasion channel, where supervisory scrutiny enhances banks' understanding of regulatory views, leading to more conservative risk management.

Methodology

• Data: Uses unique administrative data from Brazil's Central Bank SupTech application and granular loan and balance sheet data.
• Approach: Employs difference-in-differences regressions with controls for bank and time fixed effects. Robustness tests confirm findings across various specifications, including dynamic effects, placebo tests, and alternative estimators.

Policy Implications

SupTech and moral suasion channels are not merely for compliance but can effectively discipline risky bank behavior. This suggests that SupTech tools should be integrated into supervisory frameworks to improve financial stability, with further research exploring optimal risk-based supervision.

Conclusion

Risk-based supervisory actions via SupTech can enhance bank risk-taking discipline through moral suasion, with limited negative spillovers on the economy. These findings support the use of innovative technologies in banking supervision and offer policy insights for enhancing financial oversight.