Its a movie based on facts of the bubble burst that happened in the international economy during 2009, all thanks to the futures market of America being one of the main reasons, in which banks invested long with the clients monies in the government regulated home mortagage loan instruments assuming that the instruments can only go up but not down as they were government regulated but when bubble bursted, the instruments went short ending up evaporating billions of dollars of the banks ( which were actually of their clients) just like that in thin air.