The Federal Reserve Board finalized two rules Wednesday to make its supervisory stress tests more transparent and reduce year-over-year volatility in large banks' stress capital buffer requirements by approximately 50 percent, without materially changing aggregate capital levels.
Key Takeaways
- Fed finalizes two stress test rules: one enhancing transparency with annual public input on scenarios/models, another cutting capital buffer volatility ~50% via two-year averaging starting 2028.
- Global market shock component updated: large trading-book banks tested against two shocks annually; worst-case loss applied per firm.
- Noninterest income model revision proposed to capture business model diversity; 60-day comment period after Federal Register publication.
- Aggregate capital requirements not materially affected; changes aim at predictability and risk sensitivity, not loosening standards.
- Key dates: 2027 stress test uses new models with public input; 2028 buffer averaging begins.
Executive Intelligence Brief
Two Final Rules Target Transparency and Volatility
The first final rule requires the Board to invite public input annually on stress test scenarios and any material model changes. It updates the framework guiding hypothetical scenario design and adopts the models that will be used for the 2027 stress test. The rule also adjusts the stress test calendar and revises the global market shock component: banks with large trading books will now face two global market shock components each year, with the Board applying the shock that produces the largest losses for each firm.
The second final rule mandates that, when calculating stress capital buffer requirements, the Board average the results from the two most recent annual supervisory stress tests for firms subject to the test in both years. This averaging mechanism takes effect in 2028, ensuring only models incorporating public input are used in the calculation.
Regulatory Context and Precedent
The move follows a December 2024 announcement that the Board would modify the test to improve resilience. The final rules are largely consistent with proposals issued in 2025. Vice Chair for Supervision Michelle W. Bowman said the changes preserve the test's resilience by ensuring it is "transparent, granular, and risk-sensitive," giving the public greater assurance that bank risks are appropriately reflected in stress losses and capital requirements.
Transmission to Bank Capital Planning
By averaging two years of stress test results, the new buffer calculation smooths the impact of annual scenario and model changes, directly addressing industry concerns about cliff effects in capital requirements. The 50 percent volatility reduction estimate applies to year-over-year swings in the stress capital buffer, a key determinant of distribution capacity for large banks. Aggregate capital requirements are not expected to shift materially, preserving the overall loss-absorbing capacity of the system.
For trading-book firms, the dual global market shock approach introduces a more conservative tail-risk calibration, potentially increasing peak loss projections for market-sensitive portfolios while aligning with the Board's risk-sensitivity objective.
Noninterest Income Model Revision Under Consultation
Separately, the Board requested comment on a proposal to revise its noninterest income model to better capture business model diversity across firms. The current model projects each bank's fee income under stress; the revision would replace it with a more granular approach. Comments are due 60 days after publication in the Federal Register.
Implementation Timeline and Next Milestones
Models incorporating public input will be adopted for the 2027 stress test cycle. Stress capital buffer averaging begins with the 2028 calculation. Market participants should monitor the Federal Register publication date for the noninterest income model comment deadline and the annual scenario consultation process, which will now precede each stress test cycle.
