Vietcombank sold the greenback at VND25,491, a 0.03% increase from Tuesday. The greenback inched down by 0.02% to VND25,720 on the black market.
The State Bank of Vietnam hiked its reference rate by 0.03% to VND24,278. The dollar has risen against the dong by 4.39% in the year to date.
Globally, the U.S. dollar held steady against the yen and other major rivals on Wednesday as investors waited to see whether the Federal Reserve will deliver a hawkish cut before the Bank of Japan and other central banks meet this week, Reuters reported.
The U.S. dollar index, which measures the greenback against six rivals, was little changed, down 0.04% at 106.89 after hitting its highest since Nov. 26 at 107.18 on Monday.
The euro was under pressure at $1.0502 and the yen dipped slightly to 153.6 per dollar.
The Australian dollar edging to a one-year low on the U.S. dollar at $0.6325 and the New Zealand dollar at a two-year low of $0.5748.