n Investment Analysts Journal - Myths about fundamental indexing

Volume 47 Number 4
  • ISSN : 1029-3523
  • E-ISSN: 2077-0227
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Fundamental indexing starts from the observation that in a value-weighted portfolio, any overpricing affects the stock’s portfolio weight upward and its typical return downward, and vice versa; but on average the ‘drag’ on the portfolio’s expected return caused by this negative interaction is avoided if weights are based instead on accounting-based instruments for true value. We find that the drag effect is statistically and economically unimportant. Our empirical work avoids regression-based alphas, which are flawed by demonstrable instabilities in the exposures.

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