LAGOS (Reuters) - Nigeria issued 50 billion naira in 20-year, 5-year and 3-year sovereign bonds at par on Thursday at its fifth debt auction of the year, the Debt Management Office (DMO) said on Friday. Africa's issued 10 billion naira in 20-year bonds, 20 billion naira in 5-year bonds, and 20 billion naira in 3-year papers, the DMO said. Demand totalled 117.61 billion naira, but the debt office stuck to its initial 50 billion naira offer. The bonds attracted marginal rates of 12.49 percent for the 20-year paper, 11.20 percent for the 5-year instrument and 10.50 percent for the 3-year paper. "The coupon rates for the 3-year and the 20-year were set at 10.50 percent and 12.49 percent, while the original coupon rate for the 5-year would be maintained at 10.50 percent," the DMO said. "In addition, 34.56 billion naira of 20-year bonds was alloted on a non-competitive basis at the set coupon of 12.49 percent," it said. The 3-year and 20-year instruments are fresh issues, while the 5-year paper is a re-opening of previous issues. The 20-year bond is the highest tenor debt instrument in sub-Saharan Africa's second biggest economy. It was introduced in November in a bid to deepen the country's debt market. Nigeria has raised a total of 270 billion naira from bonds this year. | 
