Short interest in Pioneer Municipal High Income Opportunities Fund Inc. (NYSE:MIO) decreased during the last reporting period, falling from 19.94K to 17.19K. This put -% of the company's publicly available shares short.

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

Based on the recent average volume of 36.81K 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.