"Overall, the results from statistical tests indicate that individual investors who use technical analysis to make investment decisions are disproportionately prone to speculate on short-term stock-market trends, hold more concentrated portfolios, turn over those securities at a higher rate than people who do not use charts, and earn lower returns."
"Buffett reportedly joked about this dilemma with an audience at Vanderbilt University in 2005, "I realized that technical analysis didn't work when I turned the chart upside down and didn't get a different answer.”
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