Short interest in ProShares UltraShort S&P500 (ARCA:SDS) decreased during the last reporting period, falling from 689.53K to 623.25K. This put -% of the company's publicly available shares short.

Based on the recent average volume of 3.39M 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.