Argentina is Brazil's third largest trading partner after China and the United States.
"We are trying to find a mediated solution," he said, adding that it "necessarily" involves the granting of collaterals by Argentina, which are being currently studied. Haddad will take part in a meeting between Brazilian President Luiz Inacio Lula da Silva and Argentine Alberto Fernandez later on Tuesday. In January, the two countries announced their intention to advance discussions on a common South American currency to be used in clearing houses to execute trade payments between the two countries, helping in part to trim reliance on the dollar. Brazil also decided to recently simplify procedures of the local currency payment system (SML), an infrastructure that brings together the central banks of Brazil, Argentina, Paraguay and Uruguay. (Reporting by Marcela Ayres; Editing by Steven Grattan and Sandra Maler)