The greenback was sold at VND25,750 at unofficial exchange points, down 0.39% from Friday.
Vietcombank kept its rate stable at VND25,509.
The State Bank of Vietnam’s reference rate was unchanged at VND24,295.
The dollar has risen 4.37% against the dong since the beginning of the year.
Globally the euro slumped to a two-year low while the dollar gained on Friday after gauges of business activity were released in each region, while bitcoin again hit a record high as it continued its march toward the $100,000 mark, Reuters reported.
The dollar index, which measures the greenback against a basket of currencies, rose 0.41% to 107.50, with the euro down 0.54% at $1.0416 after falling to $1.0333, its lowest since Nov. 30, 2022. The greenback was on track for its third straight weekly advance.