The greenback dropped 0.03% to around VND27,316 at unofficial exchange points. Vietcombank kept its rate unchanged at VND26,353.
The State Bank of Vietnam kept its reference rate stable at VND25,099.
Globally, the U.S. dollar weakened in early Asian trade on Wednesday, edging back from its highest level against the Japanese yen in a week, Reuters reported.
The euro was up 0.05% at $1.1607, while sterling edged 0.02% higher to $1.3377. The yen pared early gains and was last little changed at 151.77 per dollar after the stimulus report.
The dollar index, which measures the greenback's strength against a basket of six currencies, was last trading unchanged at 98.888, slipping 0.1% after three consecutive days of gains.
The Australian dollar was steady at $0.6491, while the kiwi dollar was flat at $0.5745.