The Federal Deposit Insurance Corporation is a federal company created to insure commercial banks in the Glass-Steagall Act of 1933. Member banks pay a percentage of their deposits into the fund in exchange for the backing of the "full faith and credit" of the United States Government. Seemingly, this means that any bank failures which drive the fund to undercapitalization would trigger the backing of the United States general fund. It also means that when the trust fund is low, as it is now, the FDIC should make moves to ensure the banks it serves don't 'bankrupt' the trust! In that vein, new FDIC rules which started January 1st limit the amount of interest 'problem' banks can charge to 75 basic points above the national average rate (weighted by bank capitalization).