Nouriel Roubini, nicknamed Dr Doom for accurately predicting the housing market crash, on Monday said he was pessimistic about the economic future He said the Federal Reserve should double the fed funds rate - their guidelines for lending for banks - even though doing so will create a severe slowdown But not doing so, he argued, would create 'unhinged' inflation, running out of control His comments came as it emerged hedge fund manager Michael Burry, portrayed by Christian Bale in The Big Short, sold almost all his stock Burry's firm in the second quarter dumped shares worth $165 million, and he only kept one stock - in a Florida-based private prison company