Short interest in iShares Russell 1000 ETF (ARCA:IWB) increased during the last reporting period, rising from 1.42M to 1.55M. This put -% of the company's publicly available shares short.

Based on the recent average volume of 546.01K shares traded per day, it would take 2.85 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.