Justin Fox is the editorial director of the Harvard Business Review Group and author of The Myth of the Rational Market: A History of Risk, Reward, and Delusion on Wall Street. Before his gig at HBR, he wrote a weekly column for Time magazine and created a popular blog at Time.com, The Curious Capitalist. At our recent Motley Fool 2011 Investing Conference, Fox was interviewed by the Fool's Tim Hanson.

You can watch the video of Fox's Q&A at the conference (running time is approximately 35 minutes), and we've included two camera angles. Or you can read the full, lightly edited transcript below. Note: This was recorded on Sept. 22, 2011.