EC25: Exchange Rates
How exchange rates are determined and their impact: determination through supply and demand, and effects on consumers and producers.
Exchange Rates
How exchange rates are determined and their impact: determination through supply and demand, and effects on consumers and producers.
Key Fact: An exchange rate is the price of one currency in terms of another — e.g. £1 = $1.25. Determined by supply and demand in the foreign exchange market.
Key Fact: Appreciation: pound becomes stronger (buys more foreign currency). Depreciation: pound becomes weaker (buys less).
Key Fact: Appreciation: imports cheaper (good for consumers), exports more expensive (bad for UK exporters), overseas holidays cheaper.
Key Fact: Depreciation: imports more expensive (inflationary), exports cheaper (boosting export demand), overseas holidays cost more.
Key Fact: Factors affecting exchange rates: interest rates (higher UK rates attract foreign investment), trade balance, speculation, and government intervention.
📋 Key Vocabulary and Concepts
For Exchange Rates, you must know:
- Exchange rate
- Appreciation
- Depreciation
- Strong pound
- Weak pound
- Foreign exchange market
- Imports
- Exports
- Inflation
- Speculation
❓ Practice Questions
Q1: Explain how an exchange rate is determined through supply and demand.
Q2: Analyse how a depreciation of the pound would affect UK exporters and consumers buying imports.
Q3: Evaluate whether a strong pound is good for the UK economy.
✅ Answers
- Exchange rates are determined by supply and demand for currencies. When demand for pounds rises (foreign investors want to invest in UK), the pound appreciates. When supply of pounds rises (UK consumers buying imports), the pound depreciates.
- Depreciation: UK exporters benefit (goods cheaper for foreign buyers). UK consumers lose (imported goods become more expensive, inflationary pressure).
- A strong pound benefits: consumers (cheaper imports, cheaper holidays), firms importing raw materials. A strong pound harms: exporters, import-competing firms, tourism. Given the UK's trade deficit in goods, a slightly weaker pound may help reduce the deficit.
🎯 Exam Tips
- Appreciation = stronger currency. Depreciation = weaker currency. Don't confuse them.
- Appreciation: imports cheaper, exports dearer. Depreciation: imports dearer, exports cheaper.
- Always consider the effect on BOTH consumers and producers.
📝 Exam Technique
Economics Exam Tips:
When evaluating exchange rate changes, use the IEC framework: Importers (how affected?), Exporters (how affected?), Consumers (what happens to prices?). Exchange rate changes always create winners and losers.
When evaluating exchange rate changes, use the IEC framework: Importers (how affected?), Exporters (how affected?), Consumers (what happens to prices?). Exchange rate changes always create winners and losers.
⚠️ Common Errors
Watch Out!
Students often make mistakes here. Wrong: A weaker currency always harms a country because it makes everything more expensive. Correct: A weaker currency makes imports more expensive but makes exports cheaper. Countries like China have kept their currency undervalued to boost exports. For the UK, with its trade deficit in goods, a weaker pound can help by making UK goods more competitive abroad.
✍️ Model Answer
Full-Mark Response
Evaluate the impact of a significant depreciation of the pound on the UK economy.
A grade 9 response will: immediate effects (imports more expensive = cost-push inflation, exports cheaper = boost for exporters); longer-term (reduced trade deficit if export volumes respond, inflation may trigger rate rises); distributional (exporters gain, the poor lose more as essentials are imported); conclude: depreciation has mixed effects — helps trade balance but causes inflation that hurts consumers, particularly those on low incomes.
📊 AO Deep Dive
Assessment Objective Focus: Exchange Rates
AO1 — Knowledge: Demonstrate knowledge of Exchange Rates with precise business/economic terminology. Define key terms and state accurate factual information.
AO2 — Application: Apply knowledge of Exchange Rates to business scenarios and case studies. Use quantitative data where relevant to support your points.
AO3 — Analysis & Evaluation: Analyse and evaluate Exchange Rates by considering trade-offs, weighing costs against benefits, and reaching a reasoned judgement. Use connectives to show chains of reasoning.
Detailed Notes: Exchange Rates
How Exchange Rates Are Determined
An exchange rate is the price of one currency in terms of another. In the UK, the most commonly quoted exchange rate is the pound sterling against the US dollar (GBP/USD) and the euro (GBP/EUR). In a floating exchange rate system, the value of the pound is determined by supply and demand in the foreign exchange market. When demand for pounds is high (e.g. foreign investors buying UK assets, tourists visiting the UK, or foreign buyers purchasing UK exports), the pound appreciates (rises in value). When supply of pounds is high (e.g. UK investors buying foreign assets, UK tourists going abroad, or UK importers buying foreign goods), the pound depreciates.
Several factors influence exchange rates. Interest rate differentials are key: higher UK interest rates attract foreign capital, increasing demand for pounds and causing appreciation. Economic performance matters: strong UK growth attracts investment, strengthening the pound. Speculation can cause rapid movements: if traders expect the pound to fall, they sell it, making the fall self-fulfilling. Political events also matter: the pound fell sharply after the Brexit referendum in June 2016, from around 1.50 dollars to 1.30 dollars, because markets expected Brexit to damage the UK economy. Government intervention through buying or selling currencies can also influence rates, though the UK has not intervened significantly since the 1992 ERM crisis.
Real-World Example
On 23 June 2016, the Brexit referendum result caused the pound to fall by over 10% against the dollar overnight, the largest single-day fall since the floating exchange rate system began in 1972. The pound fell from around 1.50 to 1.33 dollars, and continued falling to a low of 1.14 in October 2016. This depreciation made UK imports more expensive (pushing up inflation) but made UK exports cheaper abroad (boosting export competitiveness). The Bank of England estimated that the Brexit-related depreciation increased UK inflation by around 2 percentage points.
The Impact of Exchange Rate Changes
An appreciation (rise in the pound's value) makes imports cheaper and exports more expensive. This benefits UK consumers (cheaper foreign holidays, lower-priced imported goods) and helps control inflation, but it harms UK exporters (whose products become more expensive abroad) and import-competing firms (who face cheaper foreign competition). A depreciation (fall in the pound's value) has the opposite effect: imports become more expensive (pushing up inflation and reducing living standards) but exports become cheaper (boosting export competitiveness and potentially increasing output and employment in export industries).
The Marshall-Lerner condition determines whether a depreciation improves the current account: it does so only if the combined price elasticity of demand for exports and imports exceeds 1. In the short run, the J-curve effect means the current account may worsen before it improves, because existing contracts fix quantities and prices take time to adjust, but the higher cost of imports immediately increases the import bill. The UK typically has a J-curve response because import demand is relatively inelastic in the short run (the UK is heavily dependent on imported food, energy and manufactured goods).
Real-World Example
After the pound depreciated following the Brexit vote, the UK experienced a textbook case of the pass-through effect. Import prices rose quickly: food prices increased by around 5% in 2017, and fuel prices rose as oil is priced in dollars. However, the expected boost to exports was more muted than theory predicted. UK export volumes grew only modestly because many firms faced new non-tariff barriers from Brexit that offset the price advantage of a weaker pound. This shows that exchange rate effects are just one factor among many affecting trade performance.
Fixed vs Floating Exchange Rate Systems
The UK currently operates a floating exchange rate, where the pound's value is determined by market forces. The advantage is that the exchange rate acts as an automatic shock absorber: if the UK economy weakens, the pound tends to fall, making exports cheaper and helping to stabilise the economy. The government and Bank of England also retain monetary policy independence, which they would lose under a fixed rate system. The disadvantage is volatility: the pound can fluctuate significantly, creating uncertainty for businesses engaged in international trade. Between 2020 and 2023, the pound ranged from 1.07 to 1.27 against the dollar.
Under a fixed exchange rate, the government or central bank commits to maintaining a specific exchange rate by buying or selling foreign currency reserves. The UK was part of the European Exchange Rate Mechanism (ERM) from 1990 to 1992, attempting to keep the pound within a band against the German mark. On Black Wednesday (16 September 1992), the UK was forced to leave the ERM because it could not maintain the required rate despite spending billions of pounds of reserves and raising interest rates to 15%. The pound then fell by 15%, and the UK adopted a floating rate from that point onward.
Real-World Example
Black Wednesday is one of the most dramatic episodes in UK exchange rate history. The government spent an estimated 3.3 billion pounds of foreign currency reserves trying to defend the pound's position in the ERM. When it became clear the market would overwhelm any defence, the UK withdrew from the ERM and let the pound float. Paradoxically, the subsequent depreciation boosted the UK economy, and the period of floating rates that followed coincided with years of steady growth. The lesson was that maintaining a fixed rate against market pressure can be extremely costly and ultimately futile.
Comparison: Appreciation vs Depreciation of the Pound
| Effect | Appreciation (Stronger Pound) | Depreciation (Weaker Pound) |
|---|---|---|
| Import prices | Cheaper (benefits consumers) | More expensive (raises inflation) |
| Export prices | More expensive abroad (hurts exporters) | Cheaper abroad (helps exporters) |
| UK holidays abroad | Cheaper (pound buys more) | More expensive (pound buys less) |
| Foreign holidays in UK | More expensive for tourists | Cheaper for tourists (boosts tourism) |
| Inflation | Tends to fall | Tends to rise |
| UK example | Pound at 1.50 dollars pre-Brexit (2015) | Pound at 1.14 dollars post-Brexit (2016) |
Additional Practice Questions
Q1: Explain how a depreciation of the pound would affect UK exporters and UK consumers, using the concept of the J-curve.
Q2: Evaluate whether a strong pound is beneficial for the UK economy.
Additional Model Answers
- A depreciation of the pound makes UK exports cheaper in foreign markets (a 10% fall in the pound means foreign buyers pay 10% less in their own currency) and makes imports more expensive for UK consumers. For exporters, this should boost demand: a UK car priced at 20,000 pounds becomes cheaper for a US buyer when the pound falls from 1.30 to 1.17 dollars (the price in dollars falls from 26,000 to 23,400). However, the J-curve effect means the current account may initially worsen before improving. This happens because in the short run, demand for imports and exports is inelastic: UK consumers cannot quickly find domestic substitutes for imported goods (the UK imports around 46% of its food), and foreign buyers take time to switch to now-cheaper UK products. So the immediate effect is that the import bill rises (higher prices, same quantity) while export revenue changes little (lower prices, same quantity). Over time, as consumers and firms adjust, export volumes rise and import volumes fall, improving the current account. The J-curve typically takes 12-18 months to work through the UK economy.
- A strong pound has mixed effects. For consumers, it is beneficial: imported goods become cheaper, reducing inflation and increasing purchasing power. UK households benefit from cheaper foreign holidays, fuel, food and electronics. The UK's reliance on imports means a strong pound significantly improves living standards. For the Bank of England, a strong pound helps keep inflation low, making the 2% target easier to achieve. However, a strong pound harms UK exporters by making their products more expensive abroad, potentially reducing demand, output and employment in export industries. UK manufacturers competing with imports also suffer as foreign goods become relatively cheaper. The UK's trade deficit in goods may worsen as imports increase and exports decline. Furthermore, a strong pound can reduce the profitability of UK multinationals that earn revenue abroad (when converted back to pounds, foreign earnings are worth less). On balance, a moderately strong pound benefits UK consumers and helps control inflation, but an excessively strong pound can damage export industries and worsen the trade deficit. The ideal position is a stable exchange rate that reflects economic fundamentals rather than speculative overshooting in either direction.
📝 Exam Questions by Topic
🎬 Video Resources
Ready to ace your GCSE Economics exams?
Get the best revision books and guides to boost your grades.