问题描述：
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As you flip through The Wall Street Journal you notice advertisements by invertment firms wanting to sell you their products.Common among all of the ads is the claim that the firm has a track record of performing above average.Explain hou they can all be above average .Is this inconsistent with the efficient markets theory?
As you flip through The Wall Street Journal you notice advertisements by invertment firms wanting to sell you their products.Common among all of the ads is the claim that the firm has a track record of performing above average.Explain hou they can all be above average .Is this inconsistent with the efficient markets theory?
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