S&P 500 index (google Finance), the US bench mark index used by many mutual fund managers, dropped 38.49%. Even the greatest investor guru of our time Warren Buffett could not escape the bear attack, his holding company Berkshire Hathaway (NYSE:BRK.B) dropped 32%.
(In 2008 S&P 500 index dropped 575.24 points or 38.91%, from 1478.49 to 903.25)