Even if your own answer to these questions is no, it’s a fact that individuals tend to sell winning investments too quickly and keep losing ones too long. It was verified in 1997 by two researchers, Terrance Odean and Brad Barber. They analyzed the trading records of ten thousand accounts at a large national discount brokerage firm over a seven-year period beginning in 1987 and ending in 1993. Among other findings, their gargantuan research effort highlighted a pair of remarkable facts. First, investors were in fact more likely to sell stocks that had risen in price rather than those that had
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