Stock moved from 6 in January to almost 28 in October. Everyone has profits and is looking them in, just look what is going on across biotech, best performing group of the year now getting hammered. Look at AAPL and GOOG huge profits down over 20 % in the last month. Better hope they have some positive news in the earnings conference call.
Oct 23-24th there were large blocks that got sold. It is always known by the big guys what news is coming. We are always left to hold the bag. I have options and they are down significantly because of the 10 point drop in 3 weeks.