Vietcombank sold the dollar at VND24,550, up 0.04% from Tuesday.
The State Bank of Vietnam (SBV) set its reference rate at VND24,088, up 0.02%.
The dollar rose 0.20% to VND24,450 on the black market.
It has increased over the dong by 3.46% since the beginning of the year.
Globally the dollar traded near a 10-month high against its major peers on Wednesday as Treasury yields stayed elevated on the prospect of higher-for-longer U.S. rates, while the yen stumbled towards a closely-watched intervention zone.
Sterling slid to a fresh six-month low of $1.2145 in early Asia trade, coming under pressure against a stronger greenback. It looked set for a quarterly decline of more than 4%, its worst in a year.
The U.S. dollar index last stood at 106.20, having peaked at a 10-month high of 106.26 in the previous session, while the euro languished near Tuesday's six-month low and last bought $1.0569.
"The U.S. dollar is stickier to the upside than the downside," said Tina Teng, market analyst at CMC Markets.