The International Monetary Fund (IMF) holds an imaginary currency called Special Drawing Rights (SDR) that acts as a currency reserve for other countries. A reserve currency is held by foreign countries to purchase or sell their national currency in order to manipulate its value. Recently, the dollar and Euro fill the role of reserve currency for 90 percent of global reserves. The SDRs currently represent the value of the Euro, pound, dollar, and yen. The basket of currencies is intended, in the rhetoric anyway, to stabilize the value of the reserve currency rather than putting control in the hands of a single government or central bank. Russia and China are now pursuing the expansion of the program to include their currency and to increase the amount of SDRs available.