Devil Take The Hindmost by Edward Chancellor (pg. 53)

Charles Kindleberger, in his book Manias, Panics and Crashes, suggests that speculative manias typically commence with a displacement which excites speculative interest. The displacement may come either from an entirely new object of investment or from the increased profitability of established investments. It is followed by positive feedback as rising share prices induce inexperienced investors to enter the stock market, and results in euphoria–a sign that investors’ rationality is weakened.