A Global Systemically Important Bank (G-SIB) is a large, internationally active bank whose failure would, in the judgment of regulators, threaten the stability of the global financial system. The designation was developed by the Basel Committee on Banking Supervision (BCBS) and the Financial Stability Board (FSB) after the 2008 financial crisis to address the "too big to fail" problem exposed by the collapse of Lehman Brothers and the bailouts of institutions like Citigroup and RBS.
The FSB publishes an updated list of G-SIBs each November, in consultation with the BCBS and national authorities. Banks are scored using an indicator-based methodology across five categories: size, interconnectedness, substitutability, complexity, and cross-jurisdictional activity. Based on their score, banks are sorted into "buckets" that determine the size of their additional capital surcharge.
Consequences of G-SIB designation include:
- Higher loss-absorbency requirements: an additional Common Equity Tier 1 (CET1) capital surcharge, typically ranging from 1% to 3.5% of risk-weighted assets depending on bucket.
- Total Loss-Absorbing Capacity (TLAC) requirements, finalized by the FSB in November 2015, ensuring sufficient bail-in-able debt is available in resolution.
- Enhanced supervision and resolution planning, including "living wills."
- Cross-border crisis management groups coordinated among home and host regulators.
The list typically contains around 29–30 banks, including institutions such as JPMorgan Chase, HSBC, BNP Paribas, Deutsche Bank, Mitsubishi UFJ, and the four major Chinese state banks. JPMorgan Chase has consistently occupied the highest-populated bucket, carrying the steepest surcharge.
The G-SIB framework operates alongside a parallel domestic regime for D-SIBs (Domestic Systemically Important Banks), set by national regulators, and the insurance-sector analogue G-SIIs. Critics argue the methodology under-weights interconnectedness and that designation creates moral hazard by implicitly confirming "too big to fail" status; supporters point to materially higher capital buffers across the largest banks since 2011.
Example
In November 2023, the Financial Stability Board's updated G-SIB list moved JPMorgan Chase into the highest occupied bucket, requiring a 2.5% CET1 capital surcharge above standard Basel III minimums.