“…There is a paradox in equity valuations: new information is expected to have price impact (Fama, 1991), and yet decades of event studies have shown that abnormal returns following news of most corporate events average no more than a few percent and rarely last more than one day or two. This is true of a wide variety of events and settings, so that the small statistical signals of price impact disappear soon after CEO deaths (Borokhovich, Brunarski, Donahue, and Harman, 2006;Salas, 2010), industrial accidents (Barnett and King, 2008), earnings surprises (Greene and Watts, 1996), and "unanticipated events" (Brooks, Patel, and Su, 2003). There are few exceptions to this pattern, other than industry deregulation or similar "Schumpeterian shocks" (Pettus, Kor, and Mahoney, 2009), and targets of changes in control such as acquisitions (Moeller, Schlingemann, and Stulz, 2005), and initial public offerings (Ritter and Welch, 2002).…”