The discovery of increased reserves of crude oil in Namibia has sparked interest in Namibian assets, with an index fund tracking local government bonds poised for its biggest annual jump on record.The Exchange Traded Fund tracking local government bonds is listed on the Namibian Stock Exchange and in South Africa and has jumped over 20% in U.S. dollar terms since Portugal-based Galp's discovery in April that the Mopane field could hold at least 10 billion barrels of oil…