Short interest in Invesco National AMT-Free Municipal Bond ETFo (ARCA:PZA) increased during the last reporting period, rising from 191.51K to 598.50K. This put -% of the company's publicly available shares short.

Short interest for Invesco National AMT-Free Municipal Bond ETFo gives investors a sense of the degree to which investors are betting on the decline of Invesco National AMT-Free Municipal Bond ETFo's stock. Short interest data is updated every two weeks.

Based on the recent average volume of 471.69K shares traded per day, it would take 1.27 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.