U.S. Bank Regulatory Proposed Changes to the Residential Loan Risk-Weight Scheme: Measuring the Impact on Capital
In March 2026, the U.S. bank regulatory agencies requested comments on a framework to modernize the regulatory capital framework of the banking system (Basel III Endgame Proposal). The agencies outlined three proposals that would impact capital requirements. The first and third capital proposals are tailored for large global systemically important banks (G-SIB), or Category I and II banks.
The second proposal—which would generally apply to all but the largest banks—seeks to recalibrate risk-weighting factors for certain loan risk categories, while maintaining the framework’s simplicity. A key element within the proposal is to change the risk weighting on residential mortgage loans, which represent a moderate portion of the loan portfolios for banks rated by KBRA. This KBRA report focuses on the second proposal, given its applicability to our rated universe.1
Key Takeaways
We expected this research to show that most banks would receive…
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