Short interest in iShares MBS ETF (NASDAQ:MBB) increased during the last reporting period, rising from 1.56M to 2.43M. This put -% of the company's publicly available shares short.

Based on the recent average volume of 6.60M 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.