The bonds, with a coupon rate of 1.875% and a maturity date of 23 October 2018, were priced at 99.837% to yield 27.15 basis points over the 1.375% US Treasury bond due September 2018.

The transaction was lead-managed by Daiwa Capital Markets, Deutsche Bank, JPMorgan Chase and UBS.

The deal marks ADB's third issue in the US dollar global bond market in 2011. In February, ADB raised $2.75 billion through a five-year bond and in June, it sold another $1.5 billion in three-year bonds.

The deal reached broad demand in the primary market with 56% of the bonds placed in Asia, 27% in the Americas and 17% in Europe, Middle East, and Africa. By investor type, 72% were central banks and official institutions, 16% were banks, 8% were fund managers, and 4% were other types of investors.

ADB plans to raise $13 billion to $14 billion from the bond markets in 2011.