Ambac Financial Group, Inc. (NYSE:AMBC – Get Free Report) saw a large drop in short interest in November. As of November 15th, there was short interest totalling 1,770,000 shares, a drop of 8.3% from the October 31st total of 1,930,000 shares. Based on an average trading volume of 418,200 shares, the short-interest ratio is presently […]