Alan Greenspan, former Federal Reserve chairman and president and founder of Greenspan Associates, listens to a question prior to a Bloomberg Television interview in Washington, D.C., U.S., on Wednesday, Nov. 27, 2013. Greenspan said the stock market is not in a bubble, even as the Dow Jones Industrial Average breached 16,000 and the Standard & Poor's 500 has climbed above 1,800, leaving both measures at record levels. Photographer: Andrew Harrer/Bloomberg *** Local Caption *** Alan Greenspan