The Federal Reserve Board on Wednesday, September 30, 2026, announced the finalization of significant changes aimed at bolstering the transparency and public accountability of its annual stress test while simultaneously reducing the year-over-year volatility in related capital requirements for large banks. These two final rules, largely consistent with proposals introduced in 2025, represent a strategic refinement of a critical component of the U.S. financial regulatory framework. Concurrently, the Board initiated a new public comment period for a proposal to refine its noninterest income model, seeking to better differentiate between banks’ diverse business models for generating fee income under stressful economic conditions.

The Federal Reserve’s stress tests are foundational to the post-2008 financial crisis regulatory architecture, mandated by the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010. Their primary objective is to ensure that large, systemically important financial institutions maintain sufficient capital reserves to continue lending to households and businesses even amidst severe economic downturns, thereby mitigating the risk of future financial crises. This commitment to resilience was further underscored in December 2024, when the Board initially announced its intention to modify the stress test framework to enhance its robustness and adaptability.

Evolution and Purpose of the Federal Reserve’s Stress Tests

The concept of stress testing in the U.S. financial system gained prominence during the depths of the 2008 financial crisis. The Supervisory Capital Assessment Program (SCAP) in 2009 was an unprecedented exercise that forced banks to quantify potential losses under adverse scenarios, leading to significant capital raises and restoring market confidence. Building on this experience, the Dodd-Frank Act codified annual stress tests, requiring the largest banks to demonstrate their ability to withstand severe hypothetical recessions. These tests, formally known as Comprehensive Capital Analysis and Review (CCAR) and Dodd-Frank Act Stress Tests (DFAST), have evolved over the years, becoming increasingly sophisticated and integral to bank capital planning.

The central premise is simple: by simulating extreme adverse economic conditions – such as sharp increases in unemployment, severe declines in asset values, and significant market dislocations – regulators can assess whether banks have enough capital to absorb potential losses and continue their vital function of credit provision. This proactive approach aims to prevent taxpayer bailouts and protect the broader economy from the ripple effects of bank failures. Over time, the framework has been refined to incorporate a broader range of risks, from credit and market risks to operational and idiosyncratic risks specific to individual firms.

A Commitment to Resilience and Transparency

Vice Chair for Supervision Michelle W. Bowman articulated the strategic importance of these finalized changes, stating, "The stress test is an essential component of our regulatory capital framework. Today’s changes preserve its resilience by ensuring that it is transparent, granular, and risk-sensitive. The public will now have greater assurance that the risks banks take will be reflected appropriately in their stress test losses and their capital requirements." This statement underscores a dual objective: maintaining the rigor of the stress test as a supervisory tool while simultaneously enhancing its predictability and comprehensibility for both financial institutions and the public.

The changes address long-standing feedback from the industry regarding the often-unpredictable year-to-year fluctuations in stress capital buffer (SCB) requirements, which are a direct output of the stress test results. Such volatility can complicate banks’ long-term capital planning, potentially leading to suboptimal allocation of resources or unexpected demands for capital raises. By introducing greater transparency and reducing this volatility, the Federal Reserve aims to foster a more stable and efficient capital planning environment without compromising the stringency of the tests.

Enhancing Transparency and Scenario Design: Details of the First Final Rule

The first of the two finalized rules introduces several pivotal adjustments to the stress test framework, primarily focusing on public engagement and scenario development. A cornerstone of this rule is the requirement for the Board to invite public input annually on the design of the hypothetical stress test scenarios and any material changes to the models used in the test. This marks a significant step towards greater public accountability, allowing external stakeholders – including academics, industry experts, and advocacy groups – to contribute to the robustness and relevance of the scenarios. This annual consultation process is expected to commence with the development of the 2028 stress test scenarios, providing ample time for feedback to be incorporated.

Furthermore, this rule updates the overarching framework that guides the design of these hypothetical scenarios. This framework outlines the economic variables and severity levels that characterize a "severely adverse" scenario, ensuring consistency and methodological rigor. The rule also formally adopts the specific models that will be employed for the 2027 stress test, providing clarity to banks about the analytical tools regulators will use to project their losses and revenues under stress. This pre-disclosure of models allows banks to better understand the methodologies and assumptions underlying the stress test projections, facilitating more informed internal risk management and capital planning.

Several adjustments to the stress test calendar are also part of this final rule. While the precise details of these calendar changes were not fully elaborated in the announcement, they are generally aimed at optimizing the timeline for scenario publication, data submission, and results dissemination, ensuring a more streamlined and predictable process for all involved parties. A well-defined calendar aids banks in allocating resources for data collection and submission, and provides market participants with a clear schedule for anticipating results.

Perhaps one of the most impactful changes within this rule concerns the global market shock component. This component applies to banks with substantial trading books and involves a set of instantaneous, severe shocks to specific market factors, such as interest rates, credit spreads, foreign exchange rates, and commodity prices. Previously, these banks were tested against a single global market shock. The new rule mandates that these institutions will now be tested against two distinct global market shock components each year. The Board will then utilize the shock that generates the largest aggregate losses for each individual firm when calculating that firm’s overall stress test results. This "maximum loss" approach for global market shocks is designed to capture a broader spectrum of market risk exposures and ensure that banks are adequately capitalized against a wider range of extreme market dislocations, reflecting the complex and interconnected nature of global financial markets. It adds a layer of conservatism and adaptability, forcing banks to consider multiple severe market disruptions simultaneously.

Reducing Volatility: The Stress Capital Buffer Averaging Mechanism

The second final rule addresses a key industry concern by introducing a mechanism to reduce the year-over-year volatility in stress capital buffer (SCB) requirements. The SCB, established in 2020, is a bank-specific capital requirement that sits atop the existing common equity tier 1 (CET1) minimum. It is determined by the difference between a bank’s projected common equity tier 1 capital ratio at the beginning of the stress test and its projected minimum common equity tier 1 capital ratio under the severely adverse scenario, plus four quarters of planned dividends. A higher SCB means a bank must hold more capital.

Under the new rule, when calculating a firm’s SCB requirement, the Board will average the results from the two most recent annual supervisory stress tests. This averaging mechanism will apply to firms that have been subject to the stress test in both of those years. The implementation of this averaging mechanism is slated to begin in 2028. The delayed implementation is crucial, as it ensures that only stress test results derived from models that have incorporated public input (as mandated by the first final rule) are used in the calculation. This thoughtful sequencing aligns the transparency enhancements with the volatility reduction strategy, reinforcing the Board’s commitment to a well-considered and publicly informed regulatory framework.

The averaging approach is expected to smooth out the impact of idiosyncratic fluctuations in scenarios or model outputs from one year to the next. For instance, a particularly severe scenario in one year, or a significant model adjustment, might lead to a sharp increase in a bank’s SCB. Averaging that result with the prior year’s outcome provides a more stable and predictable capital target, aiding banks in their long-term capital planning and resource allocation.

Proposed Revision to the Noninterest Income Model

In addition to finalizing these two rules, the Federal Reserve Board simultaneously requested public comment on a proposal to revise its noninterest income model. This model is a critical component of the stress test, as it projects each bank’s fee income (e.g., from wealth management, investment banking, service charges) under stressed economic conditions. The current model, while effective, may not fully capture the nuanced differences in business models across the diverse landscape of large financial institutions, particularly regarding their fee-generating activities.

The proposed adjustments aim to improve the stress test’s ability to account for this business model diversity. For example, a bank heavily reliant on investment banking fees might experience a different trajectory of noninterest income during a recession compared to a bank with a large base of stable wealth management fees. By refining the model, the Board seeks to ensure that the projected impact of stress on noninterest income is more accurately tailored to each firm’s specific revenue mix and operational characteristics. If adopted, these adjustments would replace the current noninterest income model. Comments on this proposal are due 60 days after its publication in the Federal Register, indicating a commitment to iterative refinement based on expert input.

Expected Impact and Broader Implications

The combined effect of these changes is anticipated to significantly reduce year-over-year volatility in capital requirements, with the Federal Reserve estimating a reduction of approximately 50 percent. This substantial reduction in volatility is expected to provide greater certainty for financial institutions, facilitating more stable capital planning and potentially leading to more consistent lending activity, even during periods of economic uncertainty. Crucially, the Board emphasizes that these changes are "not expected to materially affect aggregate capital requirements." This implies that while the path to meeting capital requirements will be smoother, the overall level of capital held by the banking system is expected to remain robust, safeguarding financial stability without imposing undue additional burdens.

For the banking industry, the reduction in volatility is likely to be a welcome development. Financial institutions often cite the unpredictability of stress test outcomes as a challenge in optimizing their capital structure and allocating resources efficiently. Greater predictability can enable banks to better manage their balance sheets, potentially freeing up capital for productive lending and investment, provided overall capital levels remain consistent.

From a regulatory perspective, these changes reflect an ongoing commitment by the Federal Reserve to evolve its supervisory tools in response to experience and feedback. Enhancing transparency through annual public input on scenarios and models builds greater public trust and allows for continuous improvement of the stress test methodology. The global market shock refinement further strengthens the test’s ability to capture complex market risks, ensuring that banks with significant trading operations are adequately prepared for extreme market events.

These modifications underscore a mature approach to financial regulation, where the foundational principles of resilience and capital adequacy are upheld, while the practical implementation is refined to improve efficiency, transparency, and predictability. As the financial landscape continues to evolve, the Federal Reserve’s iterative approach to its stress test framework remains critical to maintaining a stable and robust banking system capable of supporting the U.S. economy through any future challenges. The continued emphasis on public engagement signals a collaborative and adaptive regulatory philosophy, seeking to harness collective expertise in the pursuit of financial stability.