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ProShares UltraShort Materials (NYSEARCA:SMN - Get Free Report) was the target of a large decrease in short interest in March. As of March 31st, there was short interest totaling 1,333 shares, a decrease of 38.2% from the March 15th total of 2,156 shares. Approximately 0.4% of the company's shares are short sold. Based on an

ProShares UltraShort Materials (NYSEARCA:SMN - Get Free Report) saw a large increase in short interest in the month of February. As of February 13th, there was short interest totaling 4,388 shares, an increase of 90.0% from the January 29th total of 2,310 shares. Based on an average trading volume of 25,839 shares, the short-interest ratio