3.6—Minimum capital ratios.
(a) Risk-based capital ratio.
All national banks must have and maintain the minimum risk-based capital ratio as set forth in appendix A (and, for certain banks, in appendix B).
(b) Total assets leverage ratio.
All national banks must have and maintain Tier 1 capital in an amount equal to at least 3.0 percent of adjusted total assets.
(c) Additional leverage ratio requirement.
An institution operating at or near the level in paragraph (b) of this section should have well-diversified risks, including no undue interest rate risk exposure; excellent control systems; good earnings; high asset quality; high liquidity; and well managed on-and off-balance sheet activities; and in general be considered a strong banking organization, rated composite 1 under the Uniform Financial Institutions Rating System (CAMELS) rating system of banks. For all but the most highly-rated banks meeting the conditions set forth in this paragraph (c), the minimum Tier 1 leverage ratio is 4 percent. In all cases, banking institutions should hold capital commensurate with the level and nature of all risks.