Short interest in State Street SPDR S&P 500 ETF Trust (ARCA:SPY) increased during the last reporting period, rising from 81.72M to 99.30M. This put -% of the company's publicly available shares short.

Based on the recent average volume of 40.43M shares traded per day, it would take 2.46 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.