 AllianceBernstein Holding LP NYSE:AB saw a significant growth in short interest in the month of September. As of September 30th, there was short interest totalling 312,000 shares, a growth of 17.1 from the September 15th total of 266,500 shares. Based on an average trading volume of 337,800 shares, the short-interest ratio is currently 0.9 days. ... 