Shares of Invesco National AMT-Free Municipal Bond ETF (NYSEARCA:PZA – Get Free Report) saw an uptick in trading volume on Wednesday . 1,898,173 shares were traded during trading, an increase of 222% from the previous session’s volume of 589,272 shares.The stock last traded at $23.83 and had previously closed at $23.77. Invesco National AMT-Free Municipal […]