The Big Short is a 2015 biographical drama film adapted from Michael Lewis's nonfiction book of the same name. It chronicles the events leading up to the 2008 financial crisis, focusing on a group of investors who identified the instability in the U.S. housing market and bet against mortgage-backed securities. The film explores complex financial instruments, systemic risk, and the failures of regulatory oversight, offering a dramatized yet informative portrayal of one of the most significant economic downturns in modern history.