Short interest in SPDR Portfolio S&P 400 Mid Cap ETF (ARCA:SPMD) increased during the last reporting period, rising from 403.71K to 548.92K. This put -% of the company's publicly available shares short.

Short interest for SPDR Portfolio S&P 400 Mid Cap ETF gives investors a sense of the degree to which investors are betting on the decline of SPDR Portfolio S&P 400 Mid Cap ETF's stock. Short interest data is updated every two weeks.

Based on the recent average volume of 1.00M 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.