The dollar was sold VND24,985 at unofficial exchange points, up VND47 from Sunday.
But Vietcombank let the greenback slide by 0.004% to VND24,857. So far this year the dollar has gained 8.45% over the dong at the state-owned bank.
TPBank let the dollar fall by the same rate, while Eximbank kept it unchanged at VND24,855.
The State Bank of Vietnam continued to let the dollar slide. It dropped 0.004% to VND23,674.
The USD Index, which measures the greenback’s strength against major currencies, climbed to the highest in over a week at 107.4 points.