Vietcombank and VIB sold the dollar at VND24,858, down 0.008% from Thursday.
Eximbank let the dollar slide 0.02% to VND24,855.
Unofficial exchange points sold the dollar at around VND24,938, unchanged from Thursday.
The dollar has risen against the dong by 8.45% since the beginning of the year.
The USD Index, which measures the greenback’s strength against major currencies, hovers around the same level Thursday at 106 points.