Short interest in Calamos S&P 500 Structured Alt Protection ETF May (ARCA:CPSM) decreased during the last reporting period, falling from 4.40K to 1.02K. This put -% of the company's publicly available shares short.

Based on the recent average volume of 2.79K 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.