Bloomberg View columnist Barry Ritholtz interviews Joel Greenblatt, co-chief investment officer and managing principal at Gotham Asset Management, LLC. He has also been a director of Pzena Investment Management Inc. since October 2007. An adjunct professor at Columbia Business School since 1996, he teaches classes on value and special situation investing. He is the author of “You Can Be A Stock Market Genius,” “The Little Book That Beats the Market,” “The Little Book That Still Beats the Market” and “The Big Secret for the Small Investor.”