The fund invests at least 80% of its net assets, plus the amount of borrowings for investment purposes, if any, in securities issued by companies that are engaged in the infrastructure business and other investments with similar economic characteristics. It invests primarily in income paying equity and equity-related securities of exchange-traded infrastructure companies, which may include common stocks, preferred stocks, convertible stocks and other securities convertible into equity securities, publicly-traded units of MLPs, and securities of other investment companies, ETFs and REITs.