Short interest in Pioneer Muni High Income Advantage Tr (NYSE:MAV) increased during the last reporting period, rising from 37.07K to 51.52K. This put -% of the company's publicly available shares short.

Short interest for Pioneer Muni High gives investors a sense of the degree to which investors are betting on the decline of Pioneer Muni High's stock. Short interest data is updated every two weeks.

Based on the recent average volume of 57.20K 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.