Bloomberg Opinion columnist Barry Ritholtz interviews Ed Yardeni, the president of Yardeni Research Inc., a provider of independent global investment strategy research. Dr. Yardeni previously served as chief investment strategist for Oak Associates; chief investment strategist and managing director of Prudential Equity Group; chief investment strategist for Deutsche Bank; and chief economist for C.J. Lawrence, Prudential Securities and E.F. Hutton. Yardeni recently published the book "Predicting the Markets: A Professional Autobiography."