Short interest in iShares Mortgage Real Estate ETF (BATS:REM) increased during the last reporting period, rising from 343.20K to 905.81K. This put -% of the company's publicly available shares short.

Based on the recent average volume of 555.22K shares traded per day, it would take 1.63 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.