Too Big To Fail? 5 Biggest Banks Are 'Dead Men Walking'

America's five largest banks, which already have received $145 billion in taxpayer bailout dollars, still face potentially catastrophic losses from exotic investments if economic conditions substantially worsen, their latest financial reports show.

Citibank, Bank of America, HSBC Bank USA, Wells Fargo Bank and J.P. Morgan Chase reported that their "current" net loss risks from derivatives — insurance-like bets tied to a loan or other underlying asset — surged to $587 billion as of Dec. 31. Buried in end-of-the-year regulatory reports that McClatchy has reviewed, the figures reflect a jump of 49 percent in just 90 days.

The disclosures underscore the challenges that the banks face as they struggle to navigate through a deepening recession in which all types of loan defaults are soaring.