It is not the maths that causes the crisis - FT.com

http://www.ft.com/intl/cms/s/0/30fc4ece-760b-11e2-9891-00144feabdc0.html?ftcamp=published_links%2Frss%2Fcomment%2Ffeed%2F%2Fproduct#axzz2KxYBOV00