Before the crash.many buyers bought this stock based on hope....

Before the crash.many buyers bought this stock based on hope. Hope for another great result.
After the disappointed result, the sp almost halfed. Maybe it's a good chance to buy some shares of this stock. But I can't work out the real value of this biotech business, and I don't know how much hopes are still left at the current sp? I just don't want to pay other people's hope.