Andrew W. Lo is the Charles E. and Susan T. Harris Professor at the MIT Sloan School of Management, director of the MIT Laboratory for Financial Engineering, a principal investigator at the MIT Computer Science and Artificial Intelligence Laboratory, and an external faculty member at the Santa Fe Institute. His many books include Adaptive Markets and Hedge Funds (both Princeton). Twitter @AndrewWLo Stephen R. Foerster is professor of finance at Ivey Business School, Western University. He is the author of Financial Management: Concepts and Applications and Financial Management: A Primer. Twitter @ProfSFoerster