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%.
Formula
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 it matters
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 to interpret
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.
Thresholds
| 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?
Following the June publication, the SCB takes effect October 1 and remains in place through September 30 of the following year.
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
See SCB across 4,335 US banks
BankRegReports ranks every FDIC-insured institution by SCB, refreshed quarterly within 48 hours of FFIEC release.