Alan Greenspan is an American economist and from 1987 to 2006 chairman of the Board of Governors of the Federal Reserve of the United States. He currently works as a private advisor, making speeches and providing consulting for firms through his company, Greenspan Associates LLC.

First appointed Fed chairman by President Ronald Reagan in August 1987, he was reappointed at successive four-year intervals until retiring after a record-setting tenure on January 31, 2006, at which time he relinquished the chairmanship to Ben Bernanke. Greenspan was lauded for his handling of the Black Monday stock market crash that occurred very shortly after he first became chairman, as well as for his stewardship of the Internet-driven, dot-com economic boom of the 1990s.[citation needed] This expansion culminated in a stock market bubble burst in March 2000 followed by a recession beginning in late 2000 and continuing through 2002.

From 2001 until his retirement from the Fed, he was increasingly criticized for some statements seen as overstepping the Feds traditional purview of monetary policy, and viewed by others as overly supportive of the policies of President George W. Bush, as well as for policies seen by Business Week Magazine and others as leading to a housing bubble. During his tenure Greenspan was considered to be the leading authority on American domestic economic and monetary policy, and his active influence continues to this day.