Two decades after Alan Greenspan’s famous “irrational exuberance” speech at AEI in 1996, Dr. Greenspan spoke at AEI again, addressing record-high global stock and bond market prices following unprecedented central bank balance sheet expansions.  Following Greenspan’s keynote address, R Street’s Alex J. Pollock led an expert panel that discussed whether the world economy is now experiencing an asset market price bubble and what might be done about it.