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G-SIB and O-SII (systemically important banks)

Global systemically important banks (G-SIBs) are banks whose failure would threaten the world financial system, listed yearly by the FSB. Other systemically important institutions (O-SIIs) are identified nationally in the EU. Both carry extra capital buffers, and G-SIBs must also meet TLAC.

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Updated 31 Oct 2026.