Bloomberg Opinion columnist Barry Ritholtz interviews Joe Ricketts, who founded the company now known as TD Ameritrade, a securities-industry leader that empowers investors with innovative tools and training. Since 2008, Ricketts has devoted himself to a variety of entrepreneurial ventures. He has also actively engaged in philanthropy through the Opportunity Education Foundation, the Cloisters on the Platte Foundation, the Ricketts Conservation Foundation and the Ricketts Art Foundation. See omnystudio.com/listener for privacy information.

Bloomberg Opinion columnist Barry Ritholtz interviews former U.S. Secretary of Defense Ash Carter, who led the department from 2015 to 2017 and now serves as the director of Harvard University’s Belfer Center for Science and International Affairs. His latest book, “Inside the Five-Sided Box: Lessons From a Lifetime of Leadership in the Pentagon,” was released this year.  See omnystudio.com/listener for privacy information.