I must say, I never expected to see the day where I would be talking about anything other than reducing the debt, I'm running into the tyranny of zero, which is where you can't reduce (the debt) any more
Alan GreenspanBut how do we know when irrational exuberance has unduly escalated asset values, which then become subject to unexpected and prolonged contractions as they have in Japan over the past decade?
Alan Greenspan