Tags vietnam US dollar Central bank’s exchange rate hits highest level in months Tuesday, Dec 04, 2018 The central bank’s daily reference exchange rate of the US dollar against the Vietnamese dong has been adjusted up slightly in recent sessions, pushing it to the highest level since early this year. Bank warns on USD speculation Tuesday, Oct 06, 2015 The State Bank of Viet Nam has issued an urgent circular to curb speculation and hoarding of US dollars by enterprises.