It seems that 10 banks in London do 47% of world derivatives. Sixteen banks based in the United States do another 25% of world derivatives ($290 trillion in nominal value), and those 16 have 99.5% of the derivatives exposure of U.S. banks. Six of them — JPMorgan Chase, Citigroup, Bank of America, Goldman Sachs, Morgan Stanley, and Wells Fargo — have 75% of that exposure.


тут: http://oko-planet.su/finances/financescrisis/113663-vizualizaciya-globalnogo-rynka-derivativov.html визуализация текущего состояния.