The United States Natural Gas Fund LP is an exchange-traded security that is designed to track in percentage terms the movements of natural gas prices. UNG issues shares that may be purchased and sold on the NYSE Arca. The investment objective of UNG is for the daily changes in percentage terms of its shares' net NAV to reflect the daily changes in percentage terms of the price of natural gas delivered at the Henry Hub, Louisiana, as measured by the daily changes in the Benchmark Futures Contract, less UNG's expenses. The Benchmark is the futures contract on natural gas as traded on the NYMEX. If the near month contract is within two weeks of expiration, the Benchmark will be the next month contract to expire. The natural gas contract is natural gas delivered at the Henry Hub, Louisiana.