제 목    UJKGUULtkGpcXSD 이 름    Hershel 날 짜    2018/06/28 조 회    1 Special Delivery femara patent expiration date The data tells a pretty good story for the activists. In the 20 days either side of an SEC filing revealing that an activist had taken a position in a stock, the shares get more than 6 percent abnormal, or extra, return. That effect has been known for a while, but where the study really is compelling is in upending claims that activists somehow achieve short-term gains at the expense of longer-term underperformance.