The United States Natural Gas Fund is an exchange traded security that is designed to track in percentage terms the movements of natural gas prices. UNG issues units that may be purchased and sold on the NYSE Arca. The investment objective of UNG is for the changes in percentage terms of the units’ net asset value to reflect the changes in percentage terms of the price of natural gas delivered at the Henry Hub, Louisiana, as measured by the changes in the price of the futures contract on natural gas traded on the New York Mercantile Exchange that is the near month contract to expire, except when the near month contract is within two weeks of expiration, in which case it will be measured by the futures contract that is the next month contract to expire, less UNG’s expenses