Thus, the U. S. effectively controls the world oil-market as the dollar has become the "fiat" international trading currency. Today U.S. currency accounts for approximately two-thirds of all official exchange reserves. More than four-fifths of all foreign exchange transactions and half of all the world exports are denominated in dollars and U.S. currency accounts for about two-thirds of all official exchange reserves. The fact that billions of dollars worth of oil is priced in dollars ensures the world domination of the dollar. It allows the U.S. to act as the world's central bank, printing currency acceptable everywhere. The dollar has become an oil-backed, not gold-backed, currency.
If OPEC oil could be sold in other currencies, e.g. the euro, then U.S. economic dominance-dollar imperialism or hegemony-would be seriously challenged. More and more oil importing countries would acquire the euro as their "reserve," its value would increase, and a larger amount of trade would be transacted and denominated in euros. In such circumstances, the value of the dollar would most likely go down, some speculate between 20-40 percent.
In November 2000, Iraq began selling its oil in euros. Iraq's oil for food account at the UN was also in euros and Iraq later converted its $10 billion reserve fund at the UN to euros. Several other oil producing countries have also agreed to sell oil in euros-Iran, Libya, Venezuela, Russia, Indonesia, and Malaysia (soon to join this group). In July 2003, China announced that it would switch part of its dollar reserves into the world's emerging "reserve currency" (the euro).