President Hassan Rouhani's chief of staff has called upon people, in the current economic situation, to avoid buying more goods than they require. He urged merchants and shopkeepers to respect fairness in pricing commodities. Since the USA re-imposed sanctions, Iran is experiencing skyrocketing prices and shortages of essential commodities. People are hoarding medicines, foodstuffs, and baby nappies in large quantities, even in warehouses. Iran's currency fell to a record low (140% drop), and Iranians are now using money-changers in fear of further drops. The second stage of US sanctions, targeting oil exports and banking, will begin on 4 November. Experts believe ongoing political and economic challenges are fuelling widespread anger against the regime. But as the regime’s popularity decreases, the influence of the gospel increases. World Mission reported that Iran’s underground church is one of the fastest-growing in the world.