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Supplementary leverage ratio (SLR)
The supplementary leverage ratio is the US implementation of the Basel III Tier 1 leverage ratio, with which banks calculate the amount of common equity capital they must hold relative to their total leverage exposure. Large US banks must hold 3%. Top-tier bank holding companies must also hold an extra 2% buffer, for a total of 5%. The SLR, which does not distinguish between assets based on risk, is conceived as a backstop to risk-weighted capital requirements.
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