<Li> Steve Carell as Mark Baum (based on Steve Eisman), the hot - headed head of Front Point Partners, a hedge fund which also invests millions of dollars into credit default swaps based on the advice of Jared Vennett . Baum is disgusted by the actions of his Wall Street compatriots, and is struggling to cope with his brother's suicide . </Li> <Li> Brad Pitt as Ben Rickert (based on Ben Hockett), a paranoid and germaphobic retired former trader who, like Baum, despises the financial world but goes back in as a favor to Jamie and Charlie . </Li> <Li> Hamish Linklater as Porter Collins, an employee of Baum's and the most objectively normal . </Li> <Li> Rafe Spall as Danny Moses, an employee of Baum's and a rampant optimist . </Li>

Who plays porter collins in the big short