Mehdi Karroubi, an Iranian Cleric who has been under house arrest since 2011 for his role in the Green movement, resigned from his party, the National Trust Party. Iranian President Hassan Rouhani issued a warning during a speech at the University of Tehran saying he would not allow United States (US) President-elect Donald Trump to dismiss the long-term nuclear deal Iran signed with six global powers. Iranian general Abbas Farajpour announced that Iran’s air defences had warned off 12 fighter jets and drones during an ongoing military drill. Russia’s Energy Minister Alexander Novak announced that Russia and Iran plan to establish a joint Islamic bank. Iran's President Hassan Rouhani declared that Tehran and Moscow will continue to cooperate in the Syrian war until terrorism was eradicated and peace in the region is achieved. The European aircraft manufacturer Airbus completed a deal on 22 December to sell 100 jetliners to Iran. Turkmenistan managed to avert the loss of one of its only two buyers of natural gas with a last-minute deal with Iran. The National Iranian Oil Company and South Korea's construction conglomerate Daelim Industrial Company reached an agreement to cooperate on improving oil refining facilities in Isfahan Province. Iran’s currency, the rial, hit a record low against the US dollar. The number of automobiles manufactured in Iran during the first nine months of the past Iranian calendar year registered a 39.1 per cent increase compared to the same period last year.