Bloomberg Opinion columnist Barry Ritholtz speaks with Jeremy Siegel, who is the Russell E. Palmer professor of finance at the University of Pennsylvania's Wharton School and senior investment strategy adviser at WisdomTree Asset Management. His book "Stocks for the Long Run: The Definitive Guide to Financial Market Returns & Long-Term Investment Strategies" was named by The Washington Post as one of the 10 best investment books of all time. He is also the author of "The Future for Investors: Why the Tried and the True Triumph Over the Bold and the New."