Wall Street Bubbles
Wall Street bubbles of over evaluation occur every few years for the same reason; people get greedy.
There is a list of reasons people get greedy and cause the bubbles.
We see an excessive amount of enthusiasm of big bubbles occurring after there has been great economic growth (railroads in the 1870s, cars and electricity in the 1920s and since 2000, internet/ technology). Bubbles create extreme amounts of enthusiasm, debt, corruption, hope, and speculation.
