“…Therefore, if an event will impact the future profitability of a firm, its firm stock price will adjust immediately in response. While there are critics of event studies and the efficient market hypothesis (Banerjee, 1992;Bikhchandani et al, 1991), most scholars who have investigated the subject of market efficiency in detail provide evidence in support of the concept (Gilson and Kraakman, 2006;Malkiel, 2003), and many researchers have demonstrated that legislation affects the anticipated future profitability of firms (Ramiah et al, 2015;Chandy et al, 1995;Hackl and Testani, 1988;Conner, 1989;Romano, 1987).…”