Market size and liquidity


The foreign exchange market is the largest and most liquid financial market in the world. Traders include large banks, central banks, institutional investors, currency speculators, corporations, governments, other financial institutions, and retail investors. The average daily turnover in the global foreign exchange and related markets is continuously growing. According to the 2010 Triennial Central Bank Survey, coordinated by the Bank for International Settlements, average daily turnover was US$3.98 trillion in April 2010 (vs $1.7 trillion in 1998). Of this $3.98 trillion, $1.5 trillion was spot foreign exchange transactions and $2.5 trillion was traded in outright forwards, FX swaps and other currency derivatives.
Trading in London accounted for 36.7% of the total, making London by far the most important global center for foreign exchange trading. In second and third places respectively, trading in New York City accounted for 17.9%, and Tokyo accounted for 6.2%.
Turnover of exchange-traded foreign exchange futures and options have grown rapidly in recent years, reaching $166 billion in April 2010 (double the turnover recorded in April 2007). Exchange-traded currency derivatives represent 4% of OTC foreign exchange turnover. FX futures contracts were introduced in 1972 at the Chicago Mercantile Exchange and are actively traded relative to most other futures contracts.

Main foreign exchange market turnover, 1988–2007, measured in billions of USD.

Most developed countries 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. A number of emerging countries do not permit FX derivative products on their exchanges in view of controls on the capital accounts. The use of foreign exchange derivatives is growing in many emerging economies. Countries such as Korea, South Africa, and India have established currency futures exchanges, despite having some controls on the capital account.
 
Foreign exchange trading increased by 20% between April 2007 and April 2010 and has more than doubled since 2004. The increase in turnover is due to a number of factors: the growing importance of foreign exchange as an asset class, the increased trading activity of high-frequency traders, and the emergence of retail investors as an important market segment. The growth of electronic execution methods and the diverse selection of execution venues have lowered transaction costs, increased market liquidity, and attracted greater participation from many customer types. In particular, electronic trading via online portals has made it easier for retail traders to trade in the foreign exchange market. By 2010, retail trading is estimated to account for up to 10% of spot FX turnover, or $150 billion per day (see retail trading platforms).

Top 10 currency traders % of overall volume, May 2010
Rank Name Market share
1 Germany Deutsche Bank 18.06%
2 Switzerland UBS AG 11.30%
3 United Kingdom Barclays Capital 11.08%
4 United States Citi 7.69%
5 United Kingdom Royal Bank of Scotland 6.50%
6 United States JPMorgan 6.35%
7 United Kingdom HSBC 4.55%
8 Switzerland Credit Suisse 4.44%
9 United States Goldman Sachs 4.28%
10 United States Morgan Stanley 2.91



















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.