In recent days Iranians all over the country have been rushing to dealers to change their rials into hard currency. The result has been a spectacular plunge in the rial which has lost a third of its value against the dollar in the past week. Traders in Teheran estimate in fact that it has lost two-thirds of its value since June 2011 as U.S and European economic sanctions bite hard into the country’s oil exports. The government blames the rout on speculators.