That's one of the reasons it's moving up. Fully shorted, so squeezing, and no new shorts available to knock it down. It will fall, as fundamentals are poor. That's why everyone is shorting it. They are a money losing operation. Can't stay in business losing money.
Big squeeze @ BBY today. I was watching Level II before making my move, saw an imbalance on the sell side, and jumped in, only to be foiled by rising market. Might add a bit more here to bring my average up. This will not last.