Markets are at their most exciting when they're in a bubble. Spectacular fortunes can be made and lost in the blink of an eye. So how do bubbles form and end? On this week's episode of the Odd Lots podcast we talk to Scott Nations, the president and chief investment officer of NationsShares, and the author of "A History of The United States in Five Crashes." We discuss with him various stock market crashes and bubbles in U.S history, and what they all have in common.