At times of irrational exuberance stock valuations become stretched.
Times, Sunday Times (2013)
Imagine if we could have identified this irrational exuberance at the time by means of a rigorous test.
Times, Sunday Times (2012)
Where's the line between irrational exuberance and fraud?
Mike Daisey 21 DOG YEARS (2002)
There's no sign of irrational exuberance.
Times, Sunday Times (2009)