Despite the restoration of sanctions on Iran's energy, banking and shipping industries on Monday,... crude oil prices keep falling.<br />Prices of West Texas Intermediate crude dropped for the 9th consecutive day, its longest plunge since July 2014.<br />Brent crude also fell to 71-point-56 U.S. dollars a barrel which is down 17-point-5 percent from last month's high.<br />U.S. sanctions against Iran had boosted international oil prices ahead of the enforcement of sanctions.<br />But the U.S. decision to allow eight countries to continue importing oil from Iran has eased the supply burden.<br />The increase of U.S. crude production and signs of falling demand have also contributed to the price plunge over the last five weeks. <br />
