The central bank said the growth in reserves in May, as in the previous months, was mainly due to a favourable situation for domestic exports in the world commodity markets, which allowed the NBU to buy currency in the interbank foreign exchange market without opposing the tendency to strengthen the hryvnia. According to the NBU, the level of reserves as of June 1 covers 3.7 months of future imports and is sufficient to fulfil the obligations of Ukraine and the current operations of the government and the National Bank.