Oil dollar is a kind of Liquidity Fund, its investment pattern is the oil reverse route. Oil reverse, refers to the OPEC oil revenue flows back to the oil importer phenomenon. The huge increase in oil dollar began in 1973 in the fourth Middle East War, in twentieth Century 70 ~ 80 years of oil reverse, mainly to the international balance of payments deficit countries. After low oil prices in 1990s, oil prices began to rebound in 1999, and with the rapid development of the world's economy and the sharp rise in oil demand, the rapid increase in oil. The oil dollar is a pivotal force in the international financial market, on the current international economy, international financial market impact should not be underestimated. Investment security, liquidity, yield and controllability of the assets, decides the oil dollar investment model. <<