This one comes from Jon Taplin. Go to him for the details, including this great reminder of something Warren Buffet said back in 2003:
In his letter to Berkshire Hathaway shareholders in 2003, Warren Buffet warned that the growth of financial derivatives posed a "mega-catastrophic risk" to the economy. Derivatives like those that have caused the Sub Prime credit crisis are like "hell... easy to enter and almost impossible to exit"


