Vietcombank sold the dollar at VND24,000 Friday, up 0.04% from Thursday to the highest since Dec. 8.
Eximbank sold the greenback at VND23,970, same as Thursday.
The dollar remained stable at Techcombank at VND24,005.
The State Bank of Vietnam maintained its reference rate at VND23,642.
The dollar remained unchanged on the black market at VND23,830.
The greenback has gained over the dong by 1.14% since the beginning of the year.
Globally the dollar clung to modest gains against its major peers on Thursday, bolstered by strong economic data that continues to suggest the U.S. Federal Reserve's monetary policy tightening could be extended if it is to bring down the highest inflation in decades, Reuters reported.
The euro, down 0.09% in late New York trading, remained range bound at $1.0597. Sterling also eased 0.22% at $1.2017, shrugging off signals from a recent PMI survey for the likelihood of another Bank of England hike in March.
That left the dollar index, which tracks the greenback against six major peers, up 0.06% higher than its previous close at 104.57, but slightly off the day's high of 104.78.