# Foreign Exchange Rates

> Economics · CIE IGCSE 0455
> Source: https://www.owlsprep.com/study/cie-0455-u6-foreign-exchange-rates/

This guide explains how foreign exchange rates work, how they are determined, factors that cause them to shift, and their impact on trade and the domestic economy, aligned to CIE IGCSE Economics 0455 section 6.3 requirements.

**Prerequisites:** [Understanding of demand and supply curves (0455 Unit 2)](https://www.owlsprep.com/study/cie-0455-u2-demand-supply/); [Basics of international trade (0455 Unit 6.1)](https://www.owlsprep.com/study/cie-0455-u6-basics-international-trade/)

## Learning objectives

- Define foreign exchange rates and the foreign exchange market
- Explain how floating exchange rates are determined using demand and supply analysis
- Analyse factors that cause exchange rate fluctuations
- Evaluate the impact of exchange rate changes on trade, inflation, and employment
- Distinguish between floating, fixed, and managed exchange rate systems

## 1. Foreign Exchange Rates and Markets

**Foreign Exchange Rate** — The price of one currency expressed in terms of another currency, e.g. £1 = \\$1.20 means 1 British pound costs 1.20 US dollars

The foreign exchange (forex) market is the global decentralised market where currencies are bought and sold. Key participants include commercial banks, central banks, importers, exporters, international tourists, and currency speculators. Exchange rates enable international trade by allowing easy comparison of the prices of goods and services across different countries.

**Worked example:** If the exchange rate between the Euro (€) and Japanese Yen (¥) is €1 = ¥140, calculate how many Euros a Japanese tourist will receive if they exchange ¥70,000 for Euros.

1. Step 1: Identify the given exchange rate: €1 = ¥140
2. Step 2: Divide the total Yen amount by the Yen value of 1 Euro to get the Euro amount
3. $$70000 \div 140 = 500$$
4. Step 3: The tourist will receive €500

> **Exam tip:** Always confirm if you are converting from or to the base currency to avoid calculation errors in exchange rate arithmetic questions.

## 2. Floating Exchange Rate Determination

**Floating Exchange Rate** — An exchange rate system where the value of a currency is determined purely by the forces of demand for and supply of the currency in the forex market, with no government intervention to target a specific value

Demand for a country's currency comes from foreign buyers of its exports, foreign investors purchasing assets in the country, and foreign tourists visiting the country. Supply of a country's currency comes from domestic residents buying foreign imports, domestic investors purchasing assets abroad, and domestic tourists travelling overseas. The equilibrium exchange rate occurs where the demand for the currency equals its supply, plotted on a standard demand-supply diagram with exchange rate on the y-axis and quantity of currency on the x-axis.

**Worked example:** Explain what happens to the value of the US dollar if US exports become significantly more popular with European consumers.

1. Step 1: Higher demand for US exports means European consumers need to buy more US dollars to pay for the goods
2. Step 2: The demand curve for US dollars shifts to the right on the exchange rate diagram
3. Step 3: At the original equilibrium exchange rate, there is excess demand for US dollars
4. Step 4: The value of the US dollar rises (appreciates) until a new, higher equilibrium exchange rate is reached

> **info**
>
> An appreciation means a currency becomes worth more against other currencies under a floating system; a depreciation means it becomes worth less.

## 3. Factors Causing Exchange Rate Fluctuations

- **Inflation rate**: Lower inflation than trading partners makes a country's exports more competitive, increasing demand for its currency and leading to appreciation.
- **Interest rates**: Higher interest rates attract foreign investors seeking higher returns, increasing demand for the currency and leading to appreciation.
- **Trade balance**: A trade surplus (exports > imports) means higher demand for the country's currency from foreign buyers of exports, leading to appreciation.
- **Speculation**: If currency traders expect a currency to rise in value, they buy it now, increasing current demand and causing it to appreciate.

**Worked example:** The UK interest rate rises from 2% to 4%, while EU interest rates stay at 2%. Analyse the impact on the value of the British pound (£) against the Euro (€).

1. Step 1: Higher UK interest rates mean investors earn a higher return on savings held in UK banks than in EU banks
2. Step 2: EU investors will want to move funds to the UK, so they demand more British pounds to deposit in UK accounts
3. Step 3: The demand curve for British pounds shifts to the right, causing the pound to appreciate against the Euro

> **Exam tip:** When explaining factors that change exchange rates, always explicitly link the factor to a shift in demand or supply of the currency to earn full marks in structured questions.

## 4. Exchange Rate Systems and Economic Impacts

**Fixed Exchange Rate** — An exchange rate system where the government or central bank sets a fixed value for its currency against another major currency (e.g. the US dollar), and intervenes in the forex market to maintain this value

A managed exchange rate system is a middle ground: the exchange rate is mostly determined by market forces, but the central bank intervenes occasionally to prevent extreme, destabilising fluctuations. Most real-world exchange rate systems are managed floats.

- **Impact of currency depreciation**: Exports become cheaper for foreign buyers, imports become more expensive for domestic buyers. This can increase export revenue, reduce import spending, improve the trade balance, and create jobs in export industries, but can also increase inflation due to higher costs of imported goods and raw materials.
- **Impact of currency appreciation**: Exports become more expensive for foreign buyers, imports become cheaper for domestic buyers. This can reduce export revenue, increase import spending, worsen the trade balance, and cut jobs in export industries, but reduces inflationary pressure from cheaper imports.

**Worked example:** The Indian Rupee (₹) depreciates against the US dollar. Evaluate the impact of this change on India's economy.

1. Step 1: Cheaper Indian exports mean foreign buyers will purchase more Indian goods, increasing export revenue for Indian firms and raising output in export industries
2. Step 2: Higher demand for exports can lead to increased employment in export sectors, reducing national unemployment
3. Step 3: More expensive imports mean Indian consumers pay higher prices for foreign finished goods, and Indian firms pay more for imported raw materials, leading to cost-push inflation
4. Step 4: The overall impact depends on how responsive demand for exports and imports is to price changes, and the share of imports in domestic consumption.

**Exam command terms**

Common command terms for this topic in Paper 2:

- **Analyse** — Break down the topic into parts and explain links between causes and effects *(Analyse how a rise in inflation affects a country's exchange rate)*

- **Evaluate** — Assess both positive and negative impacts, and reach a supported conclusion *(Evaluate whether a country should use a fixed exchange rate system)*

- **Define** — Give the exact meaning of the term, add a short example if possible *(Define the term currency appreciation)*

## Common pitfalls

- **Wrong:** Using 'devaluation' to describe a market-driven fall in a currency's value under a floating system
  - Why it fails: Devaluation only refers to deliberate government action to lower a currency's value under a fixed exchange rate system
  - Correct: Use 'depreciation' for market-driven falls in floating systems, and 'devaluation' only for government-led falls in fixed systems
- **Wrong:** Failing to link exchange rate changes to demand or supply shifts in explanations
  - Why it fails: Examiners require explicit reference to demand and supply shifts to award full marks for structured answers
  - Correct: Always explain how a given factor changes demand or supply of the currency, then state the impact on its value
- **Wrong:** Confusing the impact of appreciation and depreciation on imports and exports
  - Why it fails: Mixing up these effects leads to incorrect analysis of trade impacts, losing significant marks
  - Correct: Use the memory aid: Appreciation = *A*ble to buy more foreign currency, so imports cheaper, exports more expensive; Depreciation = *D*oes not buy as much foreign currency, so imports more expensive, exports cheaper
- **Wrong:** Claiming floating exchange rates have zero government intervention
  - Why it fails: Pure floating systems are extremely rare; most are managed floats with occasional central bank intervention to stabilise rates
  - Correct: Clarify that pure floating systems have no intervention, while managed floating systems have occasional, targeted intervention
- **Wrong:** Assuming currency depreciation always improves the trade balance
  - Why it fails: If demand for exports and imports is unresponsive to price changes, depreciation may not lead to higher export revenue or lower import spending
  - Correct: State that depreciation improves the trade balance only if demand for exports and imports is sufficiently responsive to price changes

## Cheatsheet

| Concept | Definition | Key Impact/Feature |
| --- | --- | --- |
| Floating exchange rate | Value determined by market D/S, no fixed target | Self-adjusting, but can be volatile |
| Fixed exchange rate | Government sets value, intervenes to maintain it | Stable, but requires large foreign currency reserves |
| Currency appreciation | Rise in value under floating system | Cheaper imports, more expensive exports |
| Currency depreciation | Fall in value under floating system | Cheaper exports, more expensive imports |
| Devaluation | Government-led fall in value under fixed system | Same economic impact as depreciation, but deliberate |

## What's next

Now that you have mastered foreign exchange rates, you can move on to studying the balance of payments, which tracks all financial transactions between a country and the rest of the world. This topic is closely linked to exchange rates, as changes in trade flows directly affect currency demand and supply. You should also practice applying exchange rate analysis to structured exam questions, as this topic is frequently tested in Paper 2 of the CIE IGCSE Economics 0455 exam. Make sure you can draw and label the exchange rate demand and supply diagram, and explain how different factors shift these curves to change the equilibrium exchange rate.

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