How Should Stress Tests Reflect Real-World Bank Runs?
Michelle Bowman, Federal Reserve Vice Chair for Supervision, detailed three potential adjustments to bank stress-test calculations and shared insights from a review of the Fed’s response to the 2023 Silicon Valley Bank collapse. Speaking on September 18, 2026, she emphasized the need for more accurate modeling of interest rate shocks and liquidity risks in future assessments. The remarks came as regulators seek to strengthen oversight following the largest U. S. bank failure since 2008.
Breaking news
Premium Card Evolution: Experiential Value Takes Center Stage
Rising U.S. Treasury Yields Spark Debt Concerns, But Crisis Remains Unlikely
Russia Tests Digital Ruble for Government Salary Payments
Zilch Expands Financial Services with New Membership Tiers and Credit ToolsBowman explained that current stress tests may underestimate how quickly depositors can withdraw funds during periods of market stress, particularly for banks with concentrated client bases. She proposed incorporating behavioral assumptions about customer flight patterns and improving data granularity on uninsured deposits. The Fed’s internal review of its SVB supervision found gaps in communication between regional and national offices, which delayed recognition of rising risks. Bowman noted that examiners had access to relevant information but did not fully connect the dots regarding interest rate exposure and liquidity mismatches.
What Lessons Apply to Other Banks with Similar Profiles?
Bowman argued that stress scenarios must evolve beyond static balance sheet shocks to include dynamic feedback loops between asset sales, market prices, and depositor behavior. She cited SVB’s rapid deposit outflow—over $40 billion in a single day—as evidence that traditional models fail to capture contagion risks. The Fed is exploring agent-based simulations to better predict how rumors and social media might accelerate withdrawals. Industry representatives have expressed concern that overly conservative assumptions could restrict lending, but Bowman stressed that accuracy trumps convenience in safeguarding financial stability.
The review identified several regional banks with business models resembling SVB’s, particularly those reliant on tech sector deposits and long-duration bond portfolios. Bowman said the Fed is increasing targeted examinations of institutions with high uninsured deposit ratios and significant interest rate risk in their banking books. She acknowledged that supervision must be more proactive, pointing to the need for earlier intervention when red flags emerge. The Fed plans to update its guidance on concentration risk and liquidity coverage ratios by early 2027.
How will the proposed stress test changes affect community banks? Bowman indicated that smaller institutions with simple balance sheets would see minimal impact, as the adjustments primarily target complex, large banks with significant trading or maturity mismatch risks. Community banks may benefit from clearer benchmarks derived from improved modeling techniques.
Frequently Asked Questions
Did the SVB review find evidence of intentional misconduct by Fed staff? No, the review concluded that shortcomings were due to procedural and analytical gaps, not misconduct. Bowman emphasized that the findings were used to improve training and inter-office coordination, not to assign blame.
When will banks see the new stress test framework in practice? The Fed aims to pilot updated scenarios in the 2027 stress test cycle, with full implementation expected by 2028. Bowman noted that feedback from banks and external experts will be sought during the development phase.
