The auction had planned to sell VND6 trillion (US$264.3 million) worth of G-bonds with a 5-year, 7-year, 10-year, 15-year, 20-year, and 30-year maturity.
As much as VND200 billion (US$8.8 million) was mobilised from five-year bonds with an annual interest rate of 3.45%, 0.35% higher than that of the previous auction on June 20.
Ten-year bonds were sold for VND1 trillion (US$44 million) with an annual yield rate of 4.4%, up 0.03% from that of the previous auction on June 27.
As for 15-year bonds, VND110 billion (US$4.88 million) was raised at an interest rate of 4.7% per annum, equivalent to that of an auction on June 27.
Meanwhile, 20-year bonds raised VND300 billion (US$13.2 million) at a yearly rate of 5.22%, marking a 0.02% increase from that of an auction on June 27.
Last year, Vietnam sold some VND159.9 trillion, or US$7.03 billion, worth of G-bonds with an average maturity of 13.52 years and annual interest averaging 6.07%, down 0.2 percentage points against 2016.
The interest rates of Government bonds have been on the rise lately, after a long period of decline throughout 2017 and the first four months of 2018.