re: Born Suckers – The greatest Wall Street danger of all: you by Henry Blodget.
Henry Blodget mentions two profoundly (though simple) important factors that lead to poor investment decisions: Prospect Theory and Outcome Bias. He lists 7 factors, I find two profound.
Prospect Theory (more details) essentially states people are eager to “lock in gains” (sell positions with profits to realize gains) and hold losses (deffer selling positions in which they have losses so as not to “realize” the loss). Like many profound ideas the simplicity of the idea undermines the importance. This factor can make a huge difference in investment results. Many of the most successful investors understand the importance of this idea. And they repeat the importance of taking action to avoid falling into the patterns prospect theory predicts.
William O’Neil (founder of Investors Business Daily) – “Remember, 7% to 8% is your absolute loss limit. You must sell without hesitation – no waiting a few days to see what might happen or hoping the stock rallies back; no need to wait for the day’s market close” page 90, How to Make Money in Stocks: a winning system in good times or bad, 3rd Edition, 2002.
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