The Foreign Exchange market, also referred to as the "Forex" or "FX"
market is the largest financial market in the world, with a daily
average turnover of US$1.9 trillion.
"Foreign Exchange" is the simultaneous buying of one currency and
selling of another. Currencies are traded in pairs, for example Euro/US
Dollar (EUR/USD) or US Dollar/Japanese Yen (USD/JPY).
There are two reasons to buy and sell currencies. About 5% of daily
turnover is from companies and governments that buy or sell products and
services in a foreign country or must convert profits made in foreign
currencies into their domestic currency. The other 95% is trading for
profit, or speculation.
For speculators, we believe the best trading opportunities are with
the most commonly traded (and therefore most liquid) currencies, called
"the Majors." Today, more than 85% of all daily transactions involve
trading of the Majors, which include the US Dollar, Japanese Yen, Euro,
British Pound, Swiss Franc, Canadian Dollar and Australian Dollar.
A true 24-hour market from Sunday 5:00 PM ET to Friday 5:00PM ET,
Forex trading begins each day in Sydney, and moves around the globe as
the business day begins in each financial center, first to Tokyo,
London, and New York. Unlike any other financial market, investors can
respond to currency fluctuations caused by economic, social and
political events at the time they occur - day or night.
The FX market is considered an Over The Counter (OTC) or 'interbank/interdealer'
market, due to the fact that transactions are conducted between two
counterparts over the telephone or via an electronic network. Trading is
not centralized on an exchange, as with the stock and futures markets.
More information

For more background about the Foreign Exchange market, review the
Federal Reserve Banks'
"All About the Foreign Exchange Markets in the United States".