The Ugg boots put out by Deckers (NASDAQ: DECK ) took the top spot in Amazon's shoe category this year. News that the wool-lined shoes may have been a popular pick with shoppers this holiday sparked a mini rally in shares for the company, which are down big for the year. Still popular with short-sellers, the stock jumped 10% on Dec. 27. Deckers took the sales crown from another volatile investment over the last couple of years, Crocs, whose classic clog led Amazon's shoe category last year. Shorts trying to create panic selling. A common desperate more, their final chance to cover.