Vietcombank sold the greenback 0.05% lower at VND26,389.

On the black market the dollar inched up 0.04% to VND26,870.

Globally the Japanese yen gained modestly against the U.S. dollar on Wednesday as traders focused on whether weakness in the Japanese currency will prompt officials in the country to intervene, Reuters reported.

U.S. and many international markets are closed Thursday for Christmas Day.

The Japanese currency was last up 0.25% on the day against the U.S. dollar at 155.84 per dollar.

The yen has weakened despite the Bank of Japan delivering a long-anticipated rate hike last Friday. The increase had been well-telegraphed and comments from Governor Kazuo Ueda disappointed some in the market who had bet on a more hawkish tone.