Random walk; short run changes in stock prices are unpredictable.
Investing theory; firm foundation(firm value)/ castle in the air theory(psychological-behavioral finance, mass psychology
2.madness of crowds
Tulip-bulb craze/ the South Sea bubble(England)/Black Thursday (10/24/1929)-Wall Street lays an egg,95% drop
Everything’s got a moral if only you can find it.-Alice;s adventures in wonderland
4.explosive bubbles of the early 2000s
Internet bubble/ housing bubble
