Vietcombank sold the greenback 0.016% higher at VND25,480.
The State Bank of Vietnam raised its reference rate by 0.016% to VND24,267.
The dollar gained 0.19% on the black market to VND25,7209.
It has increased against the dong by 4.23% since the beginning of the year.
Globally the U.S. dollar traded close to a four-month peak versus major peers on Tuesday, while bitcoin extended its record rally as investors continued to pile into trades seen as benefiting from the incoming Donald Trump administration, Reuters reported.
The euro languished near an almost seven-month trough reached overnight, while the yuan wallowed close to a more than three-month low with Europe and China both particular targets of potential Trump tariffs.
The U.S. dollar index, which measures the currency against six peers including the euro, rose 0.07% to 105.49, after reaching 105.70 on Monday for the first time since July 3.