ARRY -The stock had come so far so fast that it was looking for a reason to pullback. IMHO there were a lot of people ready to lock in profits -even from far off the highs. And like you say, I don't think many -myself included- thought 797 was that big of deal. Now, the selumetinib data update has got me thinking.. If 797 could do this to the stock price, what could a negative selumetinib update do to the stock price? A lot. I am sure I am not the only one thinking this.
Now I know why someone got all those puts> which also makes me nervous.