First Trust Exchange-Traded AlphaDEX Fund - First Trust Mid Cap Core AlphaDEX Fund Declares Quarterly Distribution, Payable on September 30, 2013

First Trust Exchange-Traded AlphaDEX Fund - First Trust Mid Cap Core AlphaDEX Fund declared a quarterly distribution of $0.1192 per share payable on September 30, 2013 to the shareholders of recorded on September 24, 2013. Expected Ex-Dividend date is on September 20, 2013.