It has dropped 2.2% since the peak of VND25,500 last month.
But the greenback’s value stayed unchanged at VND24,860 at Vietcombank, Eximbank and VIB.
The State Bank of Vietnam also maintained its reference rate at VND23,677.
The USD Index, which measures the greenback’s strength against major currencies, has lost 5% since its peak in early September.
But some analysts said that inflation remains a concern for the U.S. economy and that could drive the dollar up.
"Inflation is likely to remain elevated for some time ... because in the U.S., at least, it's services that are driving inflation, and that can have greater persistency," Salim Ramji, global head of ETFs and index investments at BlackRock, told Reuters Wednesday.