HANOI, May 16 (Xinhua) -- Vietnam's central bank on Thursday slashed its reference exchange rate between Vietnamese dong and U.S. dollar by 8 Vietnamese dong to 23,056 Vietnamese dong per U.S. dollar.

With the current trading band of plus or minus 3 percent, the ceiling exchange rate is 23,747 Vietnamese dong per U.S. dollar, and the floor rate is 22,365 Vietnamese dong per U.S. dollar, said the State Bank of Vietnam.

Listed rates at big commercial banks remained unchanged from Wednesday. Both BIDV and Vietcombank maintained the rates at 23,250 Vietnamese dong per U.S. dollar for buying and 23,370 Vietnamese dong per U.S. dollar for selling.

This week, the reference exchange rates have seen two ups and two downs with total magnitude of 17 Vietnamese dong and 18 Vietnamese dong, respectively. Enditem