Are prices in financial markets fair and accurate? Or do they reflect human biases? These questions, and variations on them, represent one of the most divisive topics in finance: just how efficient markets really are. To explore this subject at the highest level, on this episode of the Chicago Booth Review Podcast we revisit a conversation from 2016 with two of Booth's Nobel laureates in economics: Eugene F. Fama and Richard H. Thaler.