Risk management is an important strategy in investing. On today's show, Professor Lewis Mandell, financial economist, author, and former Dean of Business at the State University of New York at Buffalo, discusses risk management and explains why he thinks the popular tactic of portfolio rebalancing may be a mistake. Read Professor Mandell's book What to Do When I Get Stupid , and visit his website http://lewismandell.com/ Follow him on Twitter: @lewmandell. Doug answers a listener's question on today's show when he tells you what you need to know about opening a U.S. brokerage account in Israel. Click here for a free interactive tool that will guide you in what you need to know when opening a U.S. brokerage account.