The decisions that companies make about how much to grow oil production are first and foremost going to be determined by market signals.”

Executive orders are regularly used by incoming presidents to kick off their administrations. The orders - the most formal type of “executive actions,” which derive their power from Article II of the Constitution - are official statements from the president about how US federal agencies are to use their resources,

Donald's Trump first day in office on Monday was marked by a huge list of executive orders. See some of the most talked about highlights.