The fund aims to provide 2x the daily returns of an index that holds futures contracts on natural gas. The fund`s underlying index, the Horizons Natural Gas Rolling Futures Index, provides exposure to the performance of front month natural gas futures contracts. HNU is a leveraged product that resets daily. As such, this is not a buy-and-hold ETF, it is best designed for short-term tactical trading purposes. Returns can vary significantly from 2x exposure to its underlying index if holding shares of HNU longer than a day.