An enormous literature emphasizes the ability of idiosyncratic risks to predict subsequent returns. On the theoretical side, previous studies suggest that investors with loss aversion utility are concerned by idiosyncratic risk (Barberis and Huang, 2001), which would explain why investors hold under-diversified portfolios. This line of argument is used to explain the role of idiosyncratic volatility (Merton, 1987) and, more recently, the role of idiosyncratic skewness (Barberis, Huang, 2008, Kumar, 2009, Boyer, Mitton, Vorkink, 2010). Mitton and Vorkink (2007) show that investors with a preference for skewness under-diversify their portfolio to invest more in assets with positive idiosyncratic skewness. As a consequence, at equilibrium, stocks with high idiosyncratic skewness pay a premium.The importance of skewness has been confirmed at the individual level in a number of empirical studies. It has a substantial predictive power with respect to future individual stock returns and equity option returns (Boyer, Mitton, Vorkink, 2010, Bali, Murray, 2013, Conrad, Dittmar, Ghysels, 2013, Boyer, Vorkink, 2014, Amaya, Christoffersen, Jacobs, Vasquez, 2015, Byun, Kim, 2016). So far, no paper has reported on the ability of market skewness or average skewness to predict subsequent market returns. Although the three-moment CAPM implies that market skewness should be a predictor of market return, this implication is not supported by the data (Chang et al., 2011). Also, to date, no paper has investigated the ability of average individual skewness to predict subsequent market returns.
An enormous literature emphasizes the ability of idiosyncratic risks to predict subsequent returns. On the theoretical side, previous studies suggest that investors with loss aversion utility are concerned by idiosyncratic risk (Barberis and Huang, 2001), which would explain why investors hold under-diversified portfolios. This line of argument is used to explain the role of idiosyncratic volatility (Merton, 1987) and, more recently, the role of idiosyncratic skewness (Barberis, Huang, 2008, Kumar, 2009, Boyer, Mitton, Vorkink, 2010). Mitton and Vorkink (2007) show that investors with a preference for skewness under-diversify their portfolio to invest more in assets with positive idiosyncratic skewness. As a consequence, at equilibrium, stocks with high idiosyncratic skewness pay a premium.<br><br>偏度的重要性已經在許多實證研究的各個層面得到確認。它對於未來個人股票收益與股票期權收益(博耶,米通,Vorkink,2010年,巴厘島,穆雷,2013年,康拉德,迪特馬,Ghysels,2013,博耶,Vorkink,2014年,阿馬亞,克里斯托弗大幅的預測能力,雅各布·巴斯克斯,2015年,卞金,2016)。到目前為止,還沒有紙報告對市場的偏度或平均偏度預測後續的市場回報的能力。儘管三一刻CAPM意味著市場的偏度應該是市場收益的預測,這暗示不支持的數據(Chang等,2011)。此外,迄今為止,無紙調查了個人平均偏度預測後續的市場回報的能力。
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