One way that really pisses me off, that they can get out of a short by buying shares direct from the company. The problem is that most likely it's the same guys who did funding before. I don't have any doubt that you're right about that's the only way they can cover.
Just take a look at some of the buying that went through an aftermarket 10,000 20,000 All above 28. No doubt we'd be 35 to 40 if they had to cover normally.
As I replied to stoneroad last week an event like and acquisition (or reliable rumors thereof) would force shorts to balance the books and close their positions as there can only be 100% of the shares acquired.
Entering the S&P is another such event (that is the #101 that one doesn't think of we you name the first 100 :). I forgot that those funds must adapt to the new S&P composition and that this would raise demand. And there is no offer!
I had an happy smile when I saw your questions:
If yesterday afternoon and then After Hours are a beginning of panic, then we are in for a treat.
QUESTION: Could our dip to 19$ have been part of this upcoming S&P event? Did Market Makers know and fill to serve what is coming?