The Federal Reserve Board finalized two rules Wednesday to enhance the transparency of its supervisory stress test 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 targeting transparency and ~50% reduction in SCB volatility.
- Annual public input on scenarios and model changes now required; 2027 test models adopted.
- Global market shock component expanded to two scenarios annually for large trading books.
- SCB requirements will average two most recent stress test results starting in 2028.
- Proposal issued to revise noninterest income model; 60-day comment period after Federal Register publication.
Executive Intelligence Brief
Transparency Mandate and Model Governance
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 formally adopts the models that will be used for the 2027 stress test cycle. The rule also adjusts the stress test calendar and overhauls the global market shock component: banks with large trading books will now face two distinct shock scenarios each year, with the Board applying the shock that produces the largest losses for each firm.
Stress Capital Buffer Averaging Mechanism
The second final rule introduces a two-year averaging mechanism for stress capital buffer (SCB) requirements. Starting in 2028, the Board will average the results from the two most recent annual supervisory stress tests for firms subject to the test in both years. The delay to 2028 ensures that only models incorporating public input feed into the averaged calculation, aligning the smoothing mechanism with the new transparency framework.
Transmission to Bank Capital Planning
The changes target a structural source of uncertainty for large bank capital planning. By halving the year-over-year volatility of SCB requirements, the rules reduce the risk of abrupt shifts in required capital buffers that can constrain lending capacity or trigger unexpected shareholder distribution cuts. The Board emphasized that aggregate capital requirements are not expected to change materially, preserving the overall loss-absorbing capacity of the banking system while improving predictability.
Noninterest Income Model Revision Proposed
Separately, the Board requested comment on a proposal to revise its noninterest income model to better capture differences in banks' business models for generating fee income. If adopted, the adjustments would replace the current model that projects each bank's fee income under stress. Comments are due 60 days after publication in the Federal Register.
Implementation Timeline and Next Milestones
The 2027 stress test will be the first to incorporate the newly adopted models and the dual global market shock framework. SCB averaging takes effect for 2028 capital requirements. Market participants should monitor the Federal Register publication date to track the 60-day comment window for the noninterest income model proposal, which could further refine how revenue diversity is stress-tested across firms.
