The Fund is a passively managed Exchange-Traded Fund (ETF), which seeks to track the price and yield performance, before fees and expenses, of the Alerian Midstream Energy Corporation Dividend IndexTM (the Index). The Index is a dividend-weighted index based on the dividend-paying portion of the North American energy infrastructure market. The Index measures the performance of companies domiciled in the US or Canada that earn the majority of cashflows from the qualifying midstream activities involving energy commodities.