CHICAGO - APRIL 08:  Former Chairman of the Federal Reserve Board of Governors Alan Greenspan addresses the annual Healthcare Information and Management Systems Society conference at McCormick Place April 8, 2009 in Chicago, Illinois. During his speech Greenspan said the current economic crisis would end when housing prices stabilize. Getty Images logo Getty Images 7 months ago

CHICAGO - APRIL 08: Former Chairman of the Federal Reserve Board of Governors Alan Greenspan addresses the annual Healthcare Information and Management Systems Society conference at McCormick Place April 8, 2009 in Chicago, Illinois. During his speech Greenspan said the current economic crisis would end when housing prices stabilize.