Robert Shiller. Although Alan Greenspan made the phrase famous, he took the phrase originally from Robert Shiller, as stated in Greenspan's biography, "The Age of Turbulence."
Irrational Exuberance - book - was created in 2000.
Extreme happiness and excitement for no apparent reason.
Irrational exuberance
Alan Greenspan
Who coined the phrase, One in a million””
"How do we know when irrational exuberance has unduly escalated asset values?" (Alan Greenspan, chairman of the US Federal Reserve, in a speech during the stock market boom of the 1990s. Translation: How do we know when stocks are too expensive?)
Economies go into a recession after a decline in the Gross Domestic Product growth rate following a period of irrational exuberance. This exuberance can often be felt in housing or high technology areas.
A coined expression is a phrase that is very popular or one that is used often. A coined expression can also be a new phrase or an existing phrase or word that is used in a new sense.
Nam June Paik coined the phrase "Information Highway" in 1974. :)
Bill Engvall is the comedian who coined the phrase, "Here's your sign".
Neologism
No. At least, not for his work in the bank. Ans 2. Alan Greenspan said that the numbers that bankers used to cobble together investment products were based on "irrational exuberance". The numbers on which toxic mortgages were based were irrational by any standards.