Brandt, Michael W.; Brav, Alon; Graham, John R.; Kumar, Alok - In: Review of Financial Studies 23 (2010) 2, pp. 863-899
Campbell, Lettau, Malkiel, and Xu (2001) document a positive trend in idiosyncratic volatility during the 1962--1997 period. We show that by 2003 volatility falls back to pre-1990s levels. Furthermore, we show that the increase and subsequent reversal is concentrated among firms with low stock...