Introduction to the Forex Market
The Foreign Exchange market is the world's largest and most liquid financial market. In this chapter we explore how it evolved from the Bretton Woods system to the modern floating-rate era, its staggering daily trading volumes, and the major participant groups.
What Is the Forex Market?
The Forex (Foreign Exchange) market is a global, decentralised market where currencies are bought and sold. Unlike stock exchanges, it has no central physical location — it operates 24 hours a day through a network of banks, broker dealers, corporations, and central banks spanning every time zone.
Forex trading is fundamentally the act of simultaneously buying one currency while selling another. Prices are quoted as currency pairs, such as EUR/USD (Euro against the US Dollar). The first currency is the base currency; the second is the quote currency. If EUR/USD = 1.1050, one euro buys 1.1050 US dollars.
The market is driven by international trade and investment flows, central bank policy, geopolitical events, and speculative positioning by institutional and retail traders.
- No single central exchange — fully decentralised, OTC (over-the-counter)
- Operates 24 hours, five days a week across global financial centres
- Currencies always traded in pairs (base / quote)
- Market participants: central banks, commercial banks, hedge funds, corporations, retail traders
| Session | Major Centres | Time (UTC) | Characteristics |
|---|---|---|---|
| Sydney | ASX, ANZ Bank | 21:00 – 06:00 | Lowest volume; AUD/NZD active |
| Tokyo | BoJ, Japanese banks | 00:00 – 09:00 | JPY pairs active |
| London | ECB, Barclays, HSBC | 07:00 – 16:00 | Highest volume; EUR/GBP active |
| New York | Federal Reserve, Citi | 12:00 – 21:00 | USD pairs peak; London overlap |
QIn the currency pair EUR/USD, which currency is the base currency?
QWhat does it mean for Forex to be an OTC market?
History and Evolution
Modern Forex as we know it was shaped by a series of international monetary agreements and crises.
Bretton Woods (1944–1971): After World War II, major currencies were pegged to the US dollar, which was itself convertible to gold at $35 per ounce. Exchange rates were fixed within narrow bands.
The Nixon Shock (1971): US President Nixon ended dollar-gold convertibility, collapsing the Bretton Woods system. Currencies began to float freely against one another.
Plaza Accord (1985): G5 nations agreed to intervene in FX markets to depreciate the USD, which had become severely overvalued. This demonstrated that coordinated central bank action can move exchange rates significantly.
European Monetary Union (1999): The euro replaced 11 national currencies on Jan 1, 1999 (physical coins/notes in 2002), creating the world's second most traded currency.
The daily trading volume has grown from roughly $5 billion in 1977 to over $7 trillion by 2022.
- Bretton Woods fixed exchange rates to USD, USD linked to gold
- 1971 Nixon Shock ended gold convertibility — free-floating era began
- ERM (European Rate Mechanism) attempted to stabilise EU currencies before the euro
- Daily Forex volumes grew 1,400-fold between 1977 and 2022
| Year | Event | Impact on Forex |
|---|---|---|
| 1944 | Bretton Woods Agreement | Fixed rates; USD as world reserve currency |
| 1971 | Nixon Shock | Floating rates; Forex market born |
| 1985 | Plaza Accord | Coordinated USD devaluation by G5 |
| 1992 | ERM Crisis | GBP and ITL forced out; Soros trade |
| 1999 | Euro Launch | EUR becomes dominant global pair |
| 2008 | Global Financial Crisis | Extreme volatility; CHF safe-haven surges |
Bar chart showing BIS survey data on daily Forex turnover from 1977 to 2007, illustrating the explosive growth of the market.
QWhat agreement established the fixed exchange rate system after World War II?
QWhy did the Bretton Woods system collapse in 1971?
Market Structure and Participants
The Forex market operates as a tiered structure. At the top, major international banks trade directly with each other on the interbank market, setting the benchmark rates the rest of the market follows.
Spot Market (37% of volume): Immediate settlement (T+2 convention). The most straightforward form of Forex transaction.
Forward/Swap Market (57% of volume): Contracts to exchange currencies at a future date and pre-agreed rate. Used extensively by corporations hedging future cash flows.
Futures (4%): Standardised exchange-traded contracts. CME Group's EUR/USD futures are the most actively traded.
Options (2%): Right but not obligation to buy/sell at a set rate. Used for structured hedging strategies.
Key participants include central banks (policy intervention), commercial banks (market-making), hedge funds (speculative positioning), multinational corporations (hedging), and broker dealers connecting retail participants to institutional liquidity.
- Interbank market sets benchmark rates — top tier of Forex hierarchy
- Spot (T+2) is the most common trade type at 37% of daily volume
- Forwards/Swaps dominate at 57% — corporate hedging drives this segment
- Futures and options are standardised exchange-traded products
| Participant | Primary Role | Typical Instrument |
|---|---|---|
| Central Banks | Monetary policy, FX intervention | Spot, swaps |
| Commercial Banks | Market-making, proprietary trading | Spot, forwards, options |
| Hedge Funds | Speculative positioning | Spot, NDF, futures, options |
| Corporations | Hedging trade flows | Forwards, swaps |
| Retail Brokers | Aggregating retail flow | Spot (CFD / margin) |
Donut chart illustrating the relative size of Spot, Forward/Swap, Futures, and Options segments of the Forex market.