Return Reversals, Idiosyncratic Risk, and Expected Returns

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  • Return Reversals, Idiosyncratic Risk, and Expected Returns Book Detail

  • Author : Wei Huang
  • Release Date : 2009
  • Publisher :
  • Genre :
  • Pages : 37
  • ISBN 13 :
  • File Size : 17,17 MB

Return Reversals, Idiosyncratic Risk, and Expected Returns by Wei Huang PDF Summary

Book Description: The empirical evidence on the cross-sectional relation between idiosyncratic risk and expected stock returns is mixed. We demonstrate that the omission of the previous month's stock returns can lead to a negatively biased estimate of the relation. The magnitude of the omitted variable bias depends on the approach to estimating the conditional idiosyncratic volatility. Although a negative relation exists when the estimate is based on daily returns, it disappears after return reversals are controlled for. Return reversals can explain both the negative relation between value-weighted portfolio returns and idiosyncratic volatility and the insignificant relation between equal-weighted portfolio returns and idiosyncratic volatility. In contrast, there is a significantly positive relation between the conditional idiosyncratic volatility estimated from monthly data and expected returns. This relation remains robust after controlling for return reversals.

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