Vietcombank sold the dollar 0.004% lower at VND26,352.
The State Bank of Vietnam brought down its reference rate by 0.004% to VND25,098.
On the black market the dollar gained 0.15% to VND27,380.
Globally the dollar drifted higher against its major peers as traders waited on the delayed release of U.S. consumer inflation data on Friday, while digesting tariff threats between Washington and Beijing, Reuters reported.
The yen weakened to a one-week low against the dollar as the market awaited details of a big stimulus package from new Prime Minister Sanae Takaichi, widely viewed as favoring fiscal and monetary easing.
The U.S. dollar index, which measures the currency against the yen, sterling, euro and three other peers, edged up 0.05% to 98.979.
The dollar added 0.17% to 152.21 yen, and earlier touched 152.26 yen for the first time since October 14.