If you are a bank credit analyst comparing large banking organizations, a G-SIB score helps answer one decision question: how much system-wide impact sits behind this institution, and what extra diligence should follow before you rely on its capital, funding, or resolution profile? Fintech founders, financial journalists, and small-bank directors can use the same lens, but the primary use case is bank-risk triage.<\/p>\n\n\n\n
A G-SIB score measures a bank’s systemic footprint: size, interconnectedness, substitutability, cross-border activity, and complexity. It does not measure default probability, management quality, or whether a specific insured-bank subsidiary is a good counterparty. It matters because the score maps into a bucket, and the bucket maps into an additional Common Equity Tier 1 requirement, TLAC expectations, resolution planning, and supervisory attention.<\/p>\n\n\n\n
Last reviewed:<\/strong> April 23, 2026. Author\/reviewer:<\/strong> Deep Digital Ventures Research, bank-regulatory analysis covering Call Reports, enforcement actions, prudential-capital rules, and public bank-supervision materials. Source references appear at the end; verify the latest filings and enforcement updates before citing this in a credit memo or investor document.<\/p>\n\n\n\n The Financial Stability Board’s 2025 G-SIB list, published on November 27, 2025, identifies 29 global systemically important banks using end-2024 data.[1]<\/sup> On that list, JPMorgan Chase is in bucket 4, tied to a 2.5% additional Common Equity Tier 1 requirement. Bank of America, Citigroup, HSBC, and Industrial and Commercial Bank of China are in bucket 3, tied to 2.0%. Bank of America and Industrial and Commercial Bank of China moved up from bucket 2 to bucket 3, while Deutsche Bank moved down from bucket 2 to bucket 1.<\/p>\n\n\n\n That is not a management grade. It is a systemic-footprint measure. The score is the underlying measure, the bucket is the public range, and the additional CET1 requirement is the capital consequence. A high score does not mean a bank is poorly run, and a lower score does not mean a bank is safe for every credit, funding, sponsor-bank, or counterparty decision.<\/p>\n\n\n\n The Basel Committee’s G-SIB cutoff thresholds set the designation cutoff at 130 basis points and bucket sizes at 100 basis points.[2]<\/sup> Bucket 1 runs from 130 to 229 basis points and carries a 1.0% additional CET1 requirement. Bucket 2 carries 1.5%, bucket 3 carries 2.0%, bucket 4 carries 2.5%, and bucket 5 carries 3.5%. The 2025 FSB list leaves bucket 5 empty.<\/p>\n\n\n\n Size matters, but it is only one of five 20% categories in the Basel framework. The Basel Committee methodology describes a score built from five category subscores: size, cross-jurisdictional activity, interconnectedness, substitutability or financial institution infrastructure, and complexity.[3]<\/sup> Total exposures are important, but they do not settle the analysis.<\/p>\n\n\n\n That is why Bank of New York Mellon and State Street appear in bucket 1 on the FSB’s 2025 list even though a reader may think first about custody, payments, and market infrastructure rather than branch lending. The framework includes assets under custody, payment activity, underwriting, and trading volume because a service can be hard to replace even when it is not the largest loan book in the market.<\/p>\n\n\n\n A useful comparison is JPMorgan Chase versus Bank of New York Mellon or State Street. JPMorgan Chase’s bucket 4 label points first to capital planning, TLAC, liquidity, and resolution capacity across a very large global franchise. Bank of New York Mellon and State Street in bucket 1 point a different way: custody, payments, settlement, and market-infrastructure substitutability. The next diligence step should follow the category driver, not the bank name alone.<\/p>\n\n\n\n For U.S. banking organizations, the Federal Reserve’s FR Y-15 Systemic Risk Report is the domestic reporting path for systemic indicators.[4]<\/sup> The Federal Reserve says FR Y-15 data are used to monitor systemic risk and help implement the U.S. G-SIB surcharge. U.S. Method 2 also replaces substitutability with short-term wholesale funding, so funding structure can change the surcharge answer even when the international bucket looks familiar.<\/p>\n\n\n\n In the Basel method, complexity is not a vague label. It is a 20% category built from three indicators: notional amount of over-the-counter derivatives, Level 3 assets, and trading and available-for-sale securities. Each indicator carries about 6.67% of the total score. Substitutability and financial institution infrastructure are separate, and that category has a 500-basis-point cap.<\/p>\n\n\n\n Those indicators matter in a stress scenario. Supervisors and management need to know which legal entity booked a trade, where collateral sits, which securities can be sold without large loss, which client services must stay live, and whether overseas supervisors can restrict liquidity movement. A simple balance sheet can be large. A complex balance sheet can be slow to understand.<\/p>\n\n\n\n The score does not catch every bank-risk question. It will not tell you whether a specific insured-bank subsidiary has local credit concentration, whether a sponsor-bank program has clean ledger reconciliation, or whether an enforcement order will slow onboarding. Those belong in the next layer of due diligence, especially when the decision is about a bank subsidiary rather than the parent holding company.<\/p>\n\n\n\n Synapse Financial Technologies filed for chapter 11 bankruptcy protection on April 22, 2024, and the CFPB later alleged recordkeeping failures tied to the location and reconciliation of consumer funds.[5]<\/sup> Synapse was not a G-SIB. The point is narrower: operational complexity can sit in ledgers, APIs, program managers, processors, and reconciliation files, not only in derivatives portfolios.<\/p>\n\n\n\n Commercial real estate concentration is another miss. The December 2006 Interagency CRE Concentration Guidance identifies two supervisory screens: construction, land development, and other land loans at 100% or more of total risk-based capital; or total CRE loans at 300% or more of total risk-based capital plus 50% or more CRE growth during the prior 36 months.[6]<\/sup> A non-G-SIB bank can clear the global systemic screen and still deserve hard local-credit review.<\/p>\n\n\n\n One concrete sponsor-bank example: Cross River Bank is not a G-SIB, but the FDIC’s March 8, 2023 consent order, docket FDIC-22-0040b, addressed fair-lending compliance, internal controls, information systems, and prudent credit underwriting practices.[7]<\/sup> For a fintech founder, that kind of order can matter more to launch timing than whether the bank appears on the FSB list.<\/p>\n\n\n\n Treat the G-SIB score as a triage label. For a depository bank, the next evidence should come from the right legal entity, the few Call Report schedules that match the question, and public supervisory records.<\/p>\n\n\n\nSize is only one component<\/h2>\n\n\n\n
Complexity changes resolution difficulty<\/h2>\n\n\n\n
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What G-SIB scores miss<\/h2>\n\n\n\n
How analysts should use the score<\/h2>\n\n\n\n
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