Basel III capital hit on G-Sibs jumps sixfold in H2 2025
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Estimated increase in Tier 1 requirements rises to 1.8% – highest since 2023
The estimated impact of the final Basel III reforms on Tier 1 minimum required capital (MRC) for global systemically important banks (G-Sibs) rebounded sharply in the second half of 2025, reaching its highest level in two-and-a-half years.
Full implementation of the final Basel III standards would increase G-Sibs’ Tier 1 MRC by an average 1.8% relative to the current framework baseline, according
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