Reference exchange rate at the State Bank of Vietnam Operations Center was kept unchanged at VND23,200 per dollar in buying price but went up VND6 per dollar over the previous day to VND23,693 per dollar.
Thus, the central bank has raised reference exchange rate by VND226 per dollar, or nearly 1 percent, since the beginning of this year. The prices of dollar at commercial banks were also sharply increased by VND40-45 per dollar.
On free market, dollars were sold at VND24,100 per dollar and bought at VND23,375 per dollar, an increase of VND30 per dollar over the previous day.
While domestic dollar price strongly climbed, the greenback weakened globally. The US Dollar Index fell to 97.75 points from 97.55 points on May 9.