Members of the Brics group of emerging markets took steps to trade their currencies more freely and to establish a joint development bank, seeking to counter the influence that developed countries exert over the global economy.

Brazil and China agreed Tuesday at a summit of Brics leaders in Durban, South Africa, to use their central banks to swap up to $30 billion in Brazilian real and Chinese yuan over the next three years, allowing businesses to trade between the two countries without converting earnings and investments to U.S. dollars, the standard conduit of global trade.

Brazil's finance minister, Guido Mantega, said the arrangement, which the countries have been working toward since this past June, would give them a means to exchange currencies 'independent of the conditions of financial markets.' He also said the Brics countries