Shares are leaping higher today, which would be almost inexplicable if not for the huge short interest in the stock. According to the latest short interest figures from the Nasdaq, more than 2 million shares were held short at the end of September. That's more than two weeks' worth of average trading volume.
I don't know what the shorts were thinking here. Metabolix, which has successfully defended its intellectual property against no less than Procter & Gamble