The foreign exchange (FX) market is the largest financial market in the world, with over $6 trillion traded every day. But what actually causes exchange rates to move?
Whether you are sending money abroad, buying a property overseas, or managing international investments, understanding what drives currency values can help you make better decisions.
Who Is Involved in the FX Market?
The FX market is global and decentralised. It does not operate on a single exchange but through a network of banks, brokers, and financial institutions. Central banks, commercial banks, hedge funds, multinational corporations, and individual clients like you all participate — each with different motivations and time horizons.
What Causes Exchange Rates to Move?
There are many reasons why a currency might rise or fall in value. Some are long-term and based on economic fundamentals. Others are short-term and driven by news, data releases, or market sentiment.
Interest rates are one of the most powerful drivers. When a central bank raises rates, its currency tends to strengthen because higher rates attract foreign capital seeking better returns. The Bank of England, the European Central Bank, and the US Federal Reserve all move markets when they speak.
Inflation erodes purchasing power. A country with persistently higher inflation than its trading partners typically sees its currency weaken over time, as its goods become less competitive.
Trade balances matter too. A country that exports more than it imports generates demand for its currency, which supports its value.
Political events and policy uncertainty can trigger sharp moves. The British pound fell significantly after the 2016 EU referendum — not because of a sudden change in economic output, but because of expectations about future political and economic challenges.
Market sentiment and positioning can amplify any of the above. When a large number of participants are positioned the same way, a single piece of news can trigger a rapid move as they all adjust at once.
Can We Always Explain Price Movements?
Not always. Sometimes prices move for clear reasons, such as a central bank decision or a surprise data release. Other times, the cause is less obvious. The FX market is vast and complex, and prices can react to a wide range of factors simultaneously.
Some theories suggest that prices reflect all available information at any given moment (the efficient market hypothesis), while others argue that prices move randomly and cannot be reliably predicted (the random walk theory). In reality, both may be true at different times and at different time horizons.
The Bottom Line
Currency values are influenced by a mix of long-term fundamentals and short-term reactions. For individuals and businesses, the practical implication is to focus on your goals and not get distracted by daily fluctuations.
If you are planning a large international payment or managing ongoing currency exposure, a clear strategy — agreed in advance, not improvised in response to market moves — is what produces better outcomes over time.
At Oku Markets, we help clients understand and manage currency risk. Contact us at info@okumarkets.com or call 0203 838 0250 to speak with our team.
Frequently Asked Questions
What makes a currency go up or down? Currencies rise or fall based on supply and demand, which are influenced by interest rates, inflation, trade balances, and investor confidence.
Why do exchange rates change every day? Rates change in real time due to news, economic data, and trading activity. The FX market is open 24 hours a day during the working week.
Can central banks control exchange rates? Central banks can influence exchange rates through interest rate decisions and direct intervention, but they do not have full control.
Is it possible to predict currency movements? Some trends can be anticipated based on economic data, but short-term movements are often unpredictable.
How does political news affect exchange rates? Political events can impact investor confidence and expectations, which in turn affect demand for a currency.