Vietcombank sold the dollar at VND24,540 Friday, up 0.04% from Thursday.
The State Bank of Vietnam raised its reference rate by 0.05% to VND24,014.
The greenback was unchanged at VND24,550 on the black market.
It has increased against the dong by 3.41% since the beginning of the year.
The dollar was headed for its best week against the yen in three months on Friday, after Federal Reserve Chair Jerome Powell and a chorus of Fed officials poured cold water on market expectations of a peak in U.S. rates, Reuters reported.
The dollar stood near a one-year high at 151.38 yen on Friday and touched one-week highs against the Australian and New Zealand dollars.
Elsewhere, the euro steadied at $1.0668, while sterling slipped 0.02% to $1.2218. They were both on track to lose 0.56% and 1.3% for the week, respectively.