USA - ECONOMY - BANKS - ATM

A man doing a banking transaction at a Citibank ATM fast cash machine. Moody's Investors Service has lowered the credit ratings on some of the world's biggest banks, including Bank of America, JPMorgan Chase, HSBC, Citigroup and Barclays, reflecting concern over their exposure to the violent swings in global financial markets. The downgrades late yesterday ultimately are a measure of Moody's view on the ability of the banks to repay their debts. Moody's didn't treat all large banks alike. It so (Photo by Viviane Moos/Corbis via Getty Images)