Every investor knows that you can’t look to a stock’s past performance as predictor of future gains. It’s become axiom, even, one of the stock phrases that we all learn about in Econ 101: ‘Past performance does not guarantee future returns’ is common formulation. But that simple phrase, while true, raises a tough question: How should an investor judge a stock?
The truth is, past is prologue, not prophet, and investors can profit by taking past performance as one of many factors in…
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