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Return dispersion and active management
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DOI：10.2469/faj.v57.n5.2479.png)
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Abstract
En 中文
The cross-sectional variation of U.S. stock returns has been unusually high in the past few years, The wide dispersion in security returns has led to correspondingly wide dispersion in fund returns. For example, the cross-sectional standard deviation of returns on actively managed domestic equity mutual funds was 24 percent in 1999, compared with only 5 percent in 1996, We argue that the wide dispersion in fund performance is a natural result of increased security return dispersion and has little to do with changes in the informational efficiency of the market or the range of managerial talent. The dramatic increase in return dispersion warrants a reexamination of traditional methodologies for measuring fund performance that implicitly assume constant dispersion. We show how performance benchmarking can be extended to incorporate the information embedded in return dispersion, as well as the benchmark mean return, by correcting fund alphas with a period- and asset-class-specific measure of security return dispersion.
Keywords:
performance measurement and evaluation : manager selection
financial markets : other
investment theory : efficient market theory
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