sentences:  The index was introduced on December 29, 2006 and consists of local currency denominated fixed-rate Federal Government of Nigeria Bonds.In order to qualify for the index, a bond must be publicly issued through the Debt Management Office and traded under the Primary Dealer/Market Maker Trading Guidelines—as these are the liquid bonds that can be readily bought and sold in the secondary market.The selection of the index constituents reflects the FGN Bonds available.