Capital
Stress Capital Buffer
Also known as SCB
The Stress Capital Buffer (SCB) is a bank-specific CET1 buffer derived from the Federal Reserve's annual stress test. It replaces the static 2.5% capital conservation buffer for the largest banks and floors at 2.5%.
How is SCB calculated?
Each year the Fed runs the bank's balance sheet through a severely adverse macroeconomic scenario. The peak-to-trough CET1 decline, plus four quarters of planned dividend payouts as a share of RWA, sets the bank's SCB. The floor is 2.5%.
Why does SCB matter?
The SCB lets capital requirements respond to a bank's specific risk profile. A bank with concentrated credit exposure that stress-tests poorly will face a larger buffer; a bank with a diversified, low-volatility book faces the floor. It is the single most consequential output of the annual CCAR exercise.
How do you interpret SCB?
Typical US large-bank SCBs run 2.5-5.0%. A bank whose SCB jumps from the floor is a meaningful signal. Usually it means stress-test losses came in worse than the bank's own internal models projected. The June SCB publication is one of the most-watched events for large-bank equity investors.
What is a good SCB?
| Range | Label | Interpretation |
|---|---|---|
| 2.5% | Floored | Minimum buffer; strong stress-test result. |
| 2.5–3.5% | Moderate | Typical for diversified universal banks. |
| 3.5–5% | Elevated | Above-average stress losses or high payout assumption. |
| > 5% | High | Sustained or large stress-test capital depletion. |
Worked example
Frequently asked
Who is subject to the Stress Capital Buffer?
Category I-IV bank holding companies (roughly $100B+ in assets). G-SIBs receive the SCB plus their G-SIB surcharge; non-SCB banks use the standard 2.5% capital conservation buffer.
When does each year's SCB take effect?
Under the current rule, the SCB set after each June stress test takes effect October 1 and stays in place for a year. In February 2026 the Federal Reserve voted to keep the requirements set in 2025 in place until 2027 while it revises its stress test models. A final rule announced September 30, 2026 moves the effective date to January 1, starting with the buffer effective January 1, 2028, and sets each buffer from the average of the two most recent stress tests, starting with the buffer effective January 1, 2029.
Can a bank reduce its SCB?
Indirectly: by reducing trading and credit concentrations, raising risk modeling quality, or reducing planned dividends. The next year's stress test will reflect the changed risk profile.
Sources
- 12 CFR §225.8: Federal Reserve capital plan rule
- Annual DFAST (Dodd-Frank Act Stress Test) results
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