The foreign exchange market (forex, FX, or currency market) is a worldwide decentralized over-the-counter financial market for the trading of currencies. Financial centers around the world function as anchors of trading between a wide range of different types of buyers and sellers around the clock, with the exception of weekends. The foreign exchange market determines the relative values of different currencies.The University of Oxford (informally Oxford University, or simply Oxford) is a university located in Oxford, United Kingdom. It is the second oldest surviving university in the world and the oldest university in the English-speaking world. Although the exact date of foundation remains unclear, there is evidence of teaching there as far back as the 11th century. The University grew rapidly from 1167 when Henry II banned English students from attending the University of Paris. In post-nominals the University of Oxford was historically abbreviated as Oxon. (from the Latin Oxoniensis), although Oxf is nowadays used in official University publications.