My theory is that apart from the few who are hedging, the shorts are motivated almost entirely by AMD's historical volatility. They don't follow or understand the fundamentals. That is why they do not cover en masse when AMD has good fundamental news. Until good fundamentals translate into exceptionally good earnings, together with strong Buy recommendations from leading analysts and large upward price movements on heavy volume shorts will not cover. And when they do, they will wait for the next price plateau and short again.
In the end they loose when a stock surges strongly over a prolonged period to progressively higher plateaus.
Expecting shorts to give the stock a lift is a waste of time. Blow-out earnings is what we need. I still think we won't get the lift off from 14-18 until second half of September.