JP Morgan Chase, Bank of America, Goldman Sachs, Citigroup, and Morgan Stanley.

Concentrated, in fact, among a mere handful of financial-services giants. About 80% of the derivative assets and liabilities carried on the balance sheets of 100 companies reviewed by Fitch were held by five banks: JP Morgan Chase, Bank of America, Goldman Sachs, Citigroup, and Morgan Stanley. Those five banks also account for more than 96% of the companies' exposure to credit derivatives.