Home›Learn›Forex›Forex, explained
Overview · Forex
Forex, explained
Learn what the foreign exchange market is, why currency moves matter, and how to read forex news without getting lost in the jargon.
What the foreign exchange market is and what it does
Forex is the market where one currency is exchanged for another. It is the plumbing of global commerce, because people, companies, banks, and governments constantly need to convert money from one currency into another.
A U.S. importer might need euros to pay a supplier in Europe. A tourist might need yen for a trip, and a multinational company might move cash across borders to pay workers, taxes, or debt.
Why currency moves matter beyond traders
Exchange rates affect the cost of imports and exports, the value of overseas travel, the price of foreign debt, and the profits of companies that earn money in other currencies. When a currency rises, foreign goods can become cheaper for local buyers, but overseas sales can become less valuable when converted back home.
Currency moves also matter for inflation and financial conditions. A weaker currency can make imported goods more expensive, while a stronger currency can help hold down those costs.
How currency pairs are quoted
Forex is usually quoted in pairs, such as EUR/USD or USD/JPY. The first currency is the base currency, and the second is the quote currency, which tells you how much of the second currency is needed to buy one unit of the first.
If EUR/USD rises, the euro is gaining value relative to the dollar. If it falls, the euro is losing value relative to the dollar. The same logic applies to every pair, although the scale of the move can differ depending on the currencies involved.
Why the U.S. dollar appears in so much forex coverage
The U.S. dollar is the world’s main reserve currency and the currency most used in global trade, finance, and commodity pricing. That is why many major currency pairs include the dollar, and why moves in the dollar often show up across the whole forex market.
When the dollar strengthens, it can affect many other currencies at once. That is one reason forex coverage often focuses on the dollar index, U.S. interest rates, and changes in expectations for Federal Reserve policy.
How interest rates and central banks move currencies
Central banks influence currencies mainly through interest rates, policy guidance, and expectations about future policy. Higher interest rates can make a currency more attractive because investors may earn more yield on assets denominated in that currency, though markets react to the full policy outlook, not just the current rate.
Forex traders also watch central bank language closely. Even a small change in tone, such as sounding more concerned about inflation or more willing to cut rates, can move exchange rates because currency values reflect expectations about what comes next.
How trade balances, growth, and inflation feed into forex
A country’s currency can be affected by its trade balance, growth outlook, inflation, and political stability. If investors expect stronger growth or more stable policy, they may be more willing to hold that currency, while weaker economic data can do the opposite.
Inflation matters because high and unstable inflation can erode purchasing power and reduce confidence in a currency. But forex does not react to one number in isolation, because markets compare one country’s outlook with another’s.
Major pairs: the most traded currency relationships
Major pairs are the most heavily traded currency combinations, usually involving the U.S. dollar and other large, liquid currencies such as the euro, yen, British pound, Swiss franc, Canadian dollar, Australian dollar, and New Zealand dollar. They tend to have tighter spreads and deeper liquidity than smaller pairs, which can make them easier to trade and follow.
Coverage of major pairs often focuses on the biggest drivers of global currency markets, such as U.S. data, central bank policy, risk sentiment, and commodity prices. Because these pairs are widely watched, they often serve as a quick read on how investors are thinking about the broader market.
Common questions
What is the difference between forex and a currency pair?
Forex is the market itself, while a currency pair is one specific quote inside that market. For example, EUR/USD is a pair, and trading forex means buying and selling pairs like that.
Why do news stories talk so much about the dollar?
Because the dollar sits at the center of global trade and finance, changes in the dollar can affect many other currencies at once. It is also the benchmark currency for many comparisons in forex reporting.
What makes a currency move up or down?
The main drivers are interest rates, central bank policy, growth, inflation, trade flows, and investor demand for safe or risky assets. In practice, currencies move when the market changes its expectations about those factors.
What are emerging market currencies?
Emerging market, or EM, currencies are the currencies of countries with developing financial markets and often higher growth potential, but also more volatility. They can react strongly to interest rates, capital flows, commodity prices, and global risk appetite.
Why do central banks matter so much in forex coverage?
Central banks set the rules that shape a currency’s return and credibility. Their rate decisions and public comments can quickly change what traders expect, which is often enough to move exchange rates even before any policy changes take effect.