Reference exchange rate down 10 VND on June 28. (Photo: VNA)

With the current trading band of +/-3 percent, the ceiling rate applicable to commercial banks during the day is 23,789 VND/USD and the floor rate is 22,399 VND/USD.

The opening-hour rates at some commercial banks remained stable.

At 8:26 am, BIDV listed the buying rate at 23,110 VND/USD and the selling rate at 23,390 VND/USD, both unchanged on June 27.

Similarly, Vietcombank also kept both rates unchanged, listing at 23,080 VND/USD (buying) and 23,390 VND/USD (selling).