The greenback gained 0.1% from Tuesday to VND27,100 at unofficial exchange points. Vietcombank kept its exchange rate stable at VND26,369.
The State Bank of Vietnam maintained its reference rate at VND25,114.
Globally, the dollar was weighed down on Wednesday by the Fed cut bets, falling 0.4% against the yen to 151.23 and 0.16% against the Swiss franc to 0.8000.
The euro was last a touch higher at $1.1611, though it has largely been insulated from the ongoing political turmoil in France. Sterling rose 0.22% to $1.3349.
Federal Reserve Chair Jerome Powell left the door open to cutting rates at the Fed's policy meeting on October 28-29 by saying the labor market remains mired in its low-hiring, low-firing doldrums, and that the absence of official economic data due to the government shutdown has not prevented policymakers from being able to assess the economic outlook, at least for now.