is by hedge funds that do not have large or any positions in ARNA who have been guaranteed some profit by the hedgies with large ARNA positions who will supply the sellers with stock to cover. The supplying hedgies will profit by being able to buy more ARNA at a lower cost than the amount they have to supply the sellers.
So if no one sells but the short hedge and the other hedge is trying to buy the short shares that the other hedge is selling. Not much traction and everyone knows by now that the short int keep reflecting on the loss of shares they keep having trying to get shares on the cheap. And now you know the 250,000 share hand off was for to manipulate shares down.