Orion Energy Systems, Inc. (NASDAQ:OESX - Get Free Report) was the target of a significant increase in short interest during the month of September. As of September 15th, there was short interest totaling 168,300 shares, an increase of 52.0% from the August 31st total of 110,735 shares. Based on an average trading volume of 99,685 shares, the days-to-cover ratio is presently 1.7 days. Currently, 4.3% of the company's stock are sold short.