The document known as the World Factbook shows that Iran ranks 19 with $133.7 billion in forex and gold reserves until December 31, 2016. This comes as the US ranks 20 with $117.3 billion.
China tops the list with $3,098 billion worth of foreign exchange and gold reserves, followed by Japan with $1,127 billion.
Foreign-exchange reserves is money or other assets held by a central bank or other monetary authority so that it can pay if need be its liabilities, such as the currency issued by the central bank, as well as the various bank reserves deposited with the central bank by the government and other financial institutions.
Reserves are held in one or more reserve currencies, mostly the United States dollar and to a lesser extent the Japanese yen.