Vietcombank lowered its rate by 0.004% to VND26,409.
On the black market the greenback declined by 0.51% to VND27,380.
Globally the U.S. dollar was soft on Thursday after lackluster economic data cemented the case for a rate cut from the Federal Reserve next week, providing relief to the yen and pushing the euro to its highest level in nearly seven weeks, Reuters reported.
Thomas Mathews, head of markets for the Asia-Pacific region at Capital Economics, said given the strength of the U.S. economy, investors may be overestimating how far the Fed will cut in the medium-term, regardless of what it does next week.
"That, I think, will keep the dollar from falling too far," he said.
Still, the dollar index, which measures the U.S. currency against six rivals, was at 98.919, languishing near a five-week low. The index is down nearly 9% for the year.