Currency War of 2009–11 dollar, with Goldman Sachs saying the real is the most over valued currency in the world. In October 2010, Brazil began increasing her capital controls, doubling a tax on foreign purchases of fixed-income assets to 4 percent so as to curb the real's appreciation to a two-year. On 18 October, Brazil sought to curb the real's gains by raising taxed capital inflow on fixed-income assets by 2% to 6% and taxed inflows for margin deposits on futures to 6% from 0.38%. Chile said it would implement capital controls to curb gains in the Chilean peso, which had strengthened the most
Reserve currency and long-term international objectives when a national currency also serves as a world reserve currency. The IMF regularly publishes the aggregated "Currency Composition of Foreign Exchange Reserves" (COFER). The reserves of the individual reporting countries and institutions are confidential. Thus the following table is a limited view about the global currency reserves that only deals with allocated reserves: Economists debate whether a single reserve currency will always dominate the global economy. Many have recently argued that one currency will almost always dominate due to network externalities (sometimes called "the network effect"), especially in the field of invoicing trade and denominating