BUENOS AIRES: Credit rater Moody’s raised Argentina’s sovereign rating on Friday as the country prepared to return to international debt markets after 15 years in the cold. The US agency raised its key rating for Argentina’s sovereign debt to B3 from Caa1, meaning it still ranks as a speculative investment with a ‘high credit risk’, but less high-risk than before. Argentina is preparing to issue its first sovereign bonds since its default in 2001 in a step toward settling its debts from that period.