Vietcombank hiked its rate by 0.02% to VND26,409.
On the black market the dollar fell 0.11% to VND27,750.
Globally the dollar was on the back foot on Thursday, with trade thinned ahead of the U.S. Thanksgiving holiday and investors turning to the coming year where a series of U.S. interest rate cuts are priced in, Reuters reported.
The yen drifted 0.4% higher to 155.87 per dollar and the euro clambered above $1.16 in morning trade.
The U.S. dollar index was flat at 99.433, having retreated from a six-month high hit a week ago to head for its largest weekly drop since July.
"The market will soon be thinking about the big trades for 2026, and I strongly doubt that 'long USD' will be one of them," said Spectra Markets' President Brent Donnelly.
He said if White House economic adviser Kevin Hassett - an advocate for rate cuts - were appointed the next Federal Reserve chair it ought to be negative for the dollar.
"Once we get past Friday, all the corporate and real money USD demand is done."