This sharp down move is not about Ariad. However, Ariad was over due for a drop like this in this kind of market. So here it is. If you area believer and still have a few buck left, the price is looking more and more attractive.
The short sellers and algos are really smashing all biotechs and have been doing so for a few days. It will pass and rationality will eventually prevail again. The only question is when.