First Trust Exchange-Traded AlphaDEX Fund - First Trust Mid Cap Growth AlphaDEX Fund is an exchange traded fund launched and managed by First Trust Advisors LP. The fund invests in public equity markets of the United States. The fund invests in stocks of companies operating across diversified sectors. The fund invests in growth stocks of mid-cap companies. It seeks to track the performance of the Nasdaq AlphaDEX Mid Cap Growth Index, by using full replication technique. First Trust Exchange-Traded AlphaDEX Fund - First Trust Mid Cap Growth AlphaDEX Fund was formed on April 19, 2011 and is domiciled in the United States.