Short interest in ProShares UltraShort Lehman 7-10 Year Treasury (ARCA:PST) increased during the last reporting period, rising from 1.37K to 2.17K. This put -% of the company's publicly available shares short.

Based on the recent average volume of 6.51K shares traded per day, it would take 1 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.