BUENOS AIRES (Reuters) - Argentina’s central bank governor unexpectedly resigned on Tuesday in the midst of negotiations with the International Monetary Fund, upsetting President Mauricio Macri’s efforts to restore investor confidence and sending the peso sliding. Former governor of Argentina's central bank, Luis Caputo, speaks alongside Economy Minister Nicolas Dujovne during a news conference in Buenos Aires, Argentina May 4, 2018. Picture taken May 4, 2018. REUTERS/Marcos Brindicci Luis...

BUENOS AIRES, May 23 (Reuters) - Argentina’s central bank moved on Wednesday to improve its debt profile by offering to swap some of its one-month Lebac securities for paper of longer duration, the bank said in a statement. If the swaps succeed in extending payments, which have obliged the bank to take a hard once-a-month blow to its reserves, the bond market may take the move as a needed financing improvement for a country ailing from high inflation and uncertainty about the stability of its...