The Big Short is a 2015 American biographical crime comedy-drama film directed and co-written by Adam McKay. Co-written by Charles Randolph, it is based on the 2010 book The Big Short: Inside the Doomsday Machine by Michael Lewis showing how the 2007–2008 financial crisis was triggered by the United States housing bubble. The film stars Christian Bale, Steve Carell, Ryan Gosling and Brad Pitt, with John Magaro, Finn Wittrock, Hamish Linklater, Rafe Spall, Jeremy Strong, and Marisa Tomei in supporting roles.

The Big Short: Inside the Doomsday Machine is a nonfiction book by Michael Lewis about the build-up of the United States housing bubble during the 2000s. It was released on March 15, 2010, by W. W. Norton & Company. It spent 28 weeks on The New York Times best-seller list, and was the basis for the 2015 film of the same name.