Quote from jsmooth:
A quote from Greenspan's book pretty much sums up this thread:
p. 466
"How do we know when irrational exuberance has unduly escalated asset values, which then become subject to unexpected and prolonged contractions? It is often suggested that the richest investors are those best at gauging shifts in human psychology rather than at forecasting earnings per shareâ¦.A whole school of stock market psychologists has arisen around this thesis. They call themselves contrarians. They trade on the view that irrational exuberance eventually ends up in fallings stock prices, as shares get bid up for no plausible reason, and then, when that becomes evident, fear grips the market and prices unravel. Contrarians pride themselves on trading against crowd psychologyâ¦..but you rarely hear about those who try this approach and lose their shirts....<B>If a stock market bulge is perceived to be the precursor of a crash, speculators and investors will try to sell out earlier. That defuses the nascent bubble and a crash is avoided. <U>The sudden eruptions of fear or euphoria are phenomena that nobody anticipates.</U> The horrendous decline in stocks on "Black Monday" came out of the dark.</B>"