Great film; a successful adaptation of the book. Its scenario, actors and humor make a strong mix that drives the message home. Immoral behavior spurred by wrong incentives and a lack of real understanding (with bankers as well as customers) of financials products laid the foundation of one of the biggest economic meltdowns ever.
Furthermore, the film shows how terribly difficult, bordering the impossible, it is to hold contrarian views – and act according to them.