Vietcombank sold the greenback at VND26,380, a 0.02% drop from Tuesday. On the black market, the currency rose 0.15% to around VND26,712.
The State Bank of Vietnam lowered its reference rate by 0.02% to VND25,124.
Globally, the dollar languished near three-week lows against the euro and Swiss franc on Wednesday after White House threats over Greenland triggered a broad selloff in U.S. assets, from the currency to Wall Street stocks and Treasury bonds, Reuters reported.
Declines in the dollar accelerated sharply overnight with a 0.53% slide in the dollar index - which measures the currency against six major peers - marking its worst single-day performance in six weeks. On Wednesday, it was flat at 98.541.
The greenback tumbled more than 1% against Europe's shared currency at one point on Tuesday to reach the lowest since December 30 at $1.1770 per euro. It was last changing hands at $1.1720.
The dollar plunged nearly 1.2% to reach 0.78795 Swiss franc on Tuesday, also the lowest since December 30, before recovering slightly to last trade at 0.78965 franc.
The dollar was steady against the yen, however, with the Japanese currency suffering its own selloff after Takaichi on Monday called snap elections and pledged a wave of measures to loosen fiscal policy.
Investors dumped dollar assets on "fears of prolonged uncertainty, strained alliances, a loss of confidence in U.S. leadership, potential retaliation and an acceleration of de-dollarisation trends," said Tony Sycamore, market analyst at IG in Sydney.