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Of the $3.98 trillion daily global turnover, trading in London accounted for around $1.85 trillion, or 36.7% of the total, making London by far the global center for foreign exchange. In second and third places respectively, trading in New York City accounted for 17.9%, and Tokyo accounted for 6.2%. In addition to "traditional" turnover, $2.1 trillion was traded in derivatives.
Exchange-traded FX futures contracts were introduced in 1972 at the Chicago Mercantile Exchange and are actively traded relative to most other futures contracts.
Several other developed countries also permit the trading of FX derivative products (like currency futures and options on currency futures) on their exchanges. All these developed countries already have fully convertible capital accounts. Most emerging countries do not permit FX derivative products on their exchanges in view of prevalent controls on the capital accounts. However, a few select emerging countries (e.g., Korea, South Africa, India) have already successfully experimented with the currency futures exchanges, despite having some controls on the capital account.
FX futures volume has grown rapidly in recent years, and accounts for about 7% of the total foreign exchange market volume, according to The Wall Street Journal Europe.
Foreign exchange trading increased by over a third in the 12 months to April 2010 and has more than doubled since 2001. This is largely due to the growing importance of foreign exchange as an asset class and an increase in fund management assets, particularly of hedge funds and pension funds. The diverse selection of execution venues have made it easier for retail traders to trade in the foreign exchange market. In 2009, retail traders constituted over 5% of the whole FX market volumes (see retail trading platforms).
Because foreign exchange is an OTC market where brokers/dealers negotiate directly with one another, there is no central exchange or clearing house. The biggest geographic trading centre is the UK, primarily London, which according to TheCityUK estimates has increased its share of global turnover in traditional transactions from 34.6% in April 2007 to 36.7% in April 2010. Due to London's dominance in the market, a particular currency's quoted price is usually the London market price. For instance, when the IMF calculates the value of its SDRs every day, they use the London market prices at noon that day.
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 primary purpose of the foreign exchange is to assist international trade and investment, by allowing businesses to convert one currency to another currency. For example, it permits a US business to import British goods and pay Pound Sterling, even though the business's income is in US dollars. It also supports speculation, and facilitates the carry trade, in which investors borrow low-yielding currencies and lend (invest in) high-yielding currencies, and which (it has been claimed) may lead to loss of competitiveness in some countries.
In a typical foreign exchange transaction, a party purchases a quantity of one currency by paying a quantity of another currency. The modern foreign exchange market began forming during the 1970s when countries gradually switched to floating exchange rates from the previous exchange rate regime, which remained fixed as per the Bretton Woods system.
The foreign exchange market is unique because of
* its huge trading volume, leading to high liquidity;
* its geographical dispersion;
* its continuous operation: 24 hours a day except weekends, i.e. trading from 20:15 GMT on Sunday until 22:00 GMT Friday;
* the variety of factors that affect exchange rates;
* the low margins of relative profit compared with other markets of fixed income; and
* the use of leverage to enhance profit margins with respect to account size.
As such, it has been referred to as the market closest to the ideal of perfect competition, notwithstanding market manipulation by central banks.[citation needed] According to the Bank for International Settlements, as of April 2010, average daily turnover in global foreign exchange markets is estimated at $3.98 trillion, a growth of approximately 20% over the $3.21 trillion daily volume as of April 2007.
The $3.98 trillion break-down is as follows:
* $1.490 trillion in spot transactions
* $475 billion in outright forwards
* $1.765 trillion in foreign exchange swaps
* $43 billion currency swaps
* $207 billion in options and other products

