Unofficial exchange points sold the dollar 0.02% higher at VND23,625.
Vietcombank maintained the greenback at VND23,745.
The rate at Eximbank was stable at VND23,710.
The State Bank of Vietnam (SBV) kept its reference rate unchanged at VND23,626.
The USD/VND exchange rate has increased by 0.06% since the beginning of the year.
Globally the dollar firmed and equity markets fell on Friday as rising interest rates unsettled investors amid a growing chorus of central bank officials insisting monetary policy needs to remain tight for some time to lick inflation, Reuters reported.
MSCI's U.S. central index of stock market performance in 47 countries shed 0.34%, while the dollar index rose 0.37%. Stocks on Wall Street ended mixed as many investors held out hope for a rate cut later this year and rising oil prices lifted energy shares.