Top 5 U.S. banks

AssetsTotal equityTier 1

in billions ratio*

Bank of America$2.3 trillion $233 11%

Charlotte, N.C.

J.P. Morgan Chase$2.0 trillion $171 12%

New York

Citigroup$1.9 trillion $155 12%

Wells Fargo & Co.$1.2 trillion $121 10%

San Francisco

U.S. Bancorp$283 billion $29 10%

Minneapolis

*Compares bank capital to risk of its assets. Well-capitalized banks have a Tier 1 Capital Ratio of 6 percent or more.