I don't blame you. Look at NPSP..similar pattern..I think the downtrend is mostly to do with capital gain tax going up next year (likely) and investors want to lock on to their gains..I am looking for biotechs that will do well not only going into 2013 but over 6 to 9 month horizon. I plan to average down barring any unexpected bad news which I don't see happening with DVAX..