Unofficial exchange points sold the greenback 0.07% higher at VND27,200.
Vietcombank kept its rate steady at VND26.405.
Globally the U.S. dollar rose against major currencies on Friday after falling in recent sessions, but was still on track for its third straight weekly drop amid the prospect of interest rate cuts by the Federal Reserve next year, Reuters reported.
The dollar index, which measures the U.S. currency against six others, rose 0.1% to 98.44, rallying from a two-month low hit on Thursday but still on track for its third weekly decline with a 0.6% fall.
For the month of December, the greenback has been 1.1% weaker so far.
The index was also down more than 9% this year, on pace for its steepest annual drop since 2017.