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.

You’re telling me that they found a power law governing the distribution of something created by the independent actions of human beings? I’m shocked…