“…These returns then reverse over the next several months. Although 1 Some notable contributions to the recent and growing literature on learning dynamics in finance are (Agarwal, Driscoll, Gabaix, and Laibson, 2008;Chiang, Hirshleifer, Qian, and Sherman, 2011;Choi, Laibson, Madrian, and Metrick, 2009;Greenwood and Nagel, 2009;Kaustia, Alho, and Puttonen, 2008;List, 2003;Mahani and Bernhardt, 2007;Nicolosi, Peng, and Zhu, 2009;Seru, Shumway, and Stoffman, 2009), and (Linnainmaa, 2011). Barber, Odean and Zhu (2009) interpret their results as evidence of noise trading, their findings are also consistent with individual investors providing liquidity to institutional investors.…”