Short interest in State Street SPDR Portfolio S&P 400 Mid Cap ETF (ARCA:SPMD) increased during the last reporting period, rising from 723.41K to 759.98K. This put -% of the company's publicly available shares short.

Based on the recent average volume of 1.37M 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.