Starting in the 1970's the U.S. government prohibited the export of its oil. However, U.S. shale oil reserves have since changed the structure of the oil market and now there is talk that the export ban may be lifted.
The export of U.S. shale oil would change the pricing structure of oil. Investors' expectations for how price activity would develop if the export ban is lifted are already reflected in the weekly NYMEX oil chart.
(Read more: Energy industry voices decry move to export US oil)