Photo from UNIAN The National Bank of Ukraine (NBU) spent US$526.6 million in the past three weeks, from July 30 to August 17, on interventions on the interbank forex market to smooth out excessive fluctuations. The regulator sold US$311.6 million on the market from July 30 to August 10, the NBU said on its website. Read alsoRussia&#39;s weaker ruble not affecting Ukraine – expert This week alone, from August 13 to August 17, it sold $215 million. Given these figures, the purchase of foreign currency by the NBU has so far exceeded its sale by $702.1 million since the beginning of the year. UNIAN memo. Ukraine&#39;s international reserves as of August 1, 2018, amounted to US$17.749 billion, which is 5.6% lower than the figure at the beginning of the year. The National Bank in 2017 bought $1.3 billion more on the interbank foreign exchange market than it sold.