Negative interest rates and bank credit risk-taking

Key findings from this study

This research indicates that:

• Banks in countries adopting NIRP contracted loan loss provisioning, indicating reduced perceived credit risk or changed risk assessment practices.
• The NIRP effect on provisioning behavior depends critically on inflation levels, bank size, and lending specialization.
• Robustness checks across multiple econometric specifications confirm the primary finding that NIRP influences bank credit risk-taking behavior.

Overview

This study investigates how negative interest rate policy affects bank risk-taking behavior, specifically examining loan loss provisioning practices among banks in OECD member countries between 2011 and 2017. The research analyzes 1958 banks across 29 countries to isolate NIRP effects from confounding factors.

Methods and approach

The analysis employs triple difference methodology as the primary approach, comparing banks across countries that adopted NIRP versus those that did not, over time periods before and after policy adoption. Robustness checks include quadruple difference models and propensity score matching to validate findings.

Results

Banks in countries implementing NIRP reduced loan loss provisioning, suggesting decreased risk-taking caution. This contraction in provisioning did not occur uniformly across all institutions. Instead, the magnitude and direction of NIRP effects varied significantly depending on country-level inflation conditions, individual bank size, and specialization in lending activities. Smaller institutions and those with particular lending focuses exhibited different provisioning responses compared to larger diversified banks.

Implications

The findings suggest NIRP transmission to credit markets operates through risk-perception channels rather than uniform credit expansion. Policymakers implementing negative rates must account for heterogeneous bank responses when evaluating financial stability implications. Banking regulation may require differentiated monitoring frameworks based on bank-specific characteristics that modulate NIRP exposure.

Scope and limitations

This summary is based on the study abstract and available metadata. It does not include a full analysis of the complete paper, supplementary materials, or underlying datasets unless explicitly stated. Findings should be interpreted in the context of the original publication.