“…2 The long list of candidate explanations includes those based on expected idiosyncratic skewness (Boyer, Mitton, and Vorkink (2010)), coskewness (Chabi-Yo and Yang (2009)), maximum daily return (Bali, Cakici, and Whitelaw (2011)), retail trading proportion (Han and Kumar (2013)), one-month return reversal (Fu (2009) and Huang, Liu, Rhee, and Zhang (2009)), illiquidity (Bali and Cakici (2008) and Han and Lesmond (2011)), uncertainty (Johnson (2004)), average variance beta (Chen and Petkova (2012)), and earnings surprises (Jiang, Xu, and Yao (2009) and Wong (2011)). In addition, several papers show that the idiosyncratic volatility puzzle is stronger among stocks that are short-constrained (Boehme, Danielsen, Kumar, and Sorescu (2009) and George and Hwang (2011)), in financial distress (Avramov, Chordia, Jostova, and Philipov (2013)), have low investor attention (George and Hwang (2011)), have prices greater than five dollars (George and Hwang (2011)), and in non-January months (George and Hwang (2011) and Doran, Jiang, and Peterson (2012)). …”