The S&P 500 is off its June lows, and a handful of heavily shorted stocks are poised to break out if the market sees a meaningful rebound. A short squeeze occurs when investors borrow shares of a company, hoping the price will fall, but the price will rise instead. In this case, these short sellers are forced to buy stocks to avoid larger losses. On Friday, CNBC Pro compiled a list of the best-selling stocks within the S&P 1500, using data from FactSet. Each stock is down from its double-digit highs. Names are sorted by those with the highest short interest as a percentage of their total “float” or the number of shares available for public investors to trade. Retailer Big Lots tops the list, with short interest at 41.8% of its float. The stock is down more than 60% from its 52-week high. Several other retail names are behind him on the list, including furniture chain Conn’s (41.3% short stake), Bed Bath & Beyond (36.8% short stake), Dick’s Sporting Goods ( 26.9%), American Eagle Outfitters (22.1%), Guess? Inc (21.8%) and PetMed Express (25%). Of the top 10 stocks with the highest short interest, Bed Bath & Beyond fell the most from its 52-week high, falling more than 80%.