"Many have already given up, that's for sure. Short interest was 16-23 million shares going into QE2 at half what AMZN sells for today, now it's down to just 8.7 million shares." --SeekingAlpha
Even on this board it seems nearly all the perma-bears who have harassed other posters here for several years or more have suddenly vanished recently, their positions utterly crushed. Only the naive newbies remain. Shorting a stock because you insist it is "overvalued" can be a suicide mission for the stubborn valuation obsessed short-seller.
You sell when you need the cash. If you don't need it, why sell too early and miss the upside?
I know a poster who thought $130 was a good time to sell. He did but the stock pulled back for so short a time he was never able to repurchase shares at that level and missed the run from $130 to $260. Some of the brain challenged shorts try to say that was a great move, and what's really funny is that some of the dumb longs here believe that.
As the article I quoted mentioned, over 60% or 70% of the shorts are gone now. That is simply a fact. Also, nearly all of the long-time short trolls who used to be obsessed with posting dozens of times daily have stopped posting. I would say about 95-99% of them are now gone.
Whether or not they are forced out by brokers or by setting foolish stops ("oh, no way could it go over $230, because then the PE would be blah, blah, blah...") doesn't change this observation.