Exchange rates — AQA GCSE Economics
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Exchange rates explained
Exchange rates covers 3 specification points, including How exchange rates are determined and The effects of changes in the exchange rate on….
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How exchange rates are determined
In a floating exchange rate system, the value of a currency is determined by the market forces of supply and demand. Demand for the UK pound (£) comes from foreign buyers needing pounds to purchase UK exports, invest in UK businesses, or save in UK banks. Supply of the pound is generated when UK residents sell pounds to buy foreign imports or invest abroad. If demand for the pound increases—for instance, due to higher UK interest rates attracting foreign savers—the price of the pound rises, causing it to appreciate. Conversely, if UK consumers buy more imports, the supply of pounds on the foreign exchange market increases, causing the currency's value to depreciate against other currencies.
The effects of changes in the exchange rate on consumers and producers
Exchange rate changes significantly impact both consumers and producers. If the pound appreciates (e.g., £1 = $1.20 to £1 = $1.50), imports become cheaper for UK consumers, increasing their purchasing power for foreign goods like electronics. However, UK producers exporting goods find their products more expensive abroad, potentially reducing sales. Conversely, a depreciation makes imports dearer, hurting consumers through higher prices, but benefits domestic producers who export, as their goods become more price-competitive internationally. Producers relying on imported raw materials will face higher production costs when the currency depreciates, which can squeeze their profit margins.
Students should be able to understand how exchange rates are determined through the interaction of demand and supply.
In a floating exchange rate system, the value of a currency is determined by the market forces of demand and supply. Demand for a currency, such as the British Pound, comes from foreigners wanting to buy UK exports, invest in UK firms, or save in UK banks. Supply of the Pound comes from UK residents wanting to buy foreign imports or invest abroad, requiring them to sell Pounds to buy foreign currency. The equilibrium exchange rate is reached where the quantity of Pounds demanded equals the quantity supplied. If UK interest rates rise, foreign investors demand more Pounds to save in UK banks, shifting the demand curve to the right and causing the exchange rate to appreciate.
Your focus
- Describe how market forces of supply and demand determine a floating exchange rate.
- Identify the factors that cause shifts in the demand and supply of a currency.
- Understand how currency market shifts alter equilibrium exchange rates without drawing diagrams.
Show all 9 objectives
- Analyse the impact of an exchange rate appreciation on consumer purchasing power.
- Evaluate how a depreciation affects the profit margins of producers who export goods.
- Assess the effect of exchange rate fluctuations on producers reliant on imported raw materials.
- Explain how the demand and supply of a currency determine its equilibrium exchange rate.
- Describe the effect of an increase in demand for exports on the currency exchange rate without drawing diagrams.
- Explain the impact of currency demand and supply shifts on exchange rate equilibrium without constructing diagrams.
Exchange rates exam tips
Marking Points
- Identifies that floating exchange rates are determined by the interaction of supply and demand in the foreign exchange market.
- Explains that demand for a currency is driven by exports, inward foreign investment, and speculation.
- Explains that the supply of a currency is driven by imports, outward foreign investment, and speculation.
- Explain how shifts in currency demand or supply lead to currency appreciation or depreciation without needing to draw diagrams.
- Identify that an appreciation of the currency lowers the price of imported goods for domestic consumers.
- Explain that a depreciation of the currency increases the international price competitiveness of domestic producers.
- Recognise that producers importing raw materials face higher costs of production when the exchange rate falls.
- Calculate the new price of an imported or exported good following a specified change in the exchange rate.
- Identify that in a floating system, exchange rates are set by the market forces of demand and supply.
- Explain that an increase in demand for a country's exports shifts the demand curve for its currency to the right, causing an appreciation.
- Recognise that an increase in a country's demand for imports increases the supply of its currency on foreign exchange markets, leading to a depreciation.
- Explain changes in the equilibrium exchange rate when currency demand or supply shifts, recognising that drawing diagrams is not required at GCSE.
Examiner Tips
- 💡AQA GCSE Economics does not expect you to draw exchange rate diagrams; focus on explaining how shifts in demand and supply affect currency values.
- 💡Use the acronym SPICED (Strong Pound Imports Cheap Exports Dear) to remember the effects of exchange rate changes, but ensure you first explain how the rate was determined.
- 💡When explaining currency demand, explicitly mention that foreign buyers must purchase the domestic currency to buy domestic goods.
- 💡Use the acronyms SPICED (Strong Pound Imports Cheap Exports Dear) and WPIDEC (Weak Pound Imports Dear Exports Cheap) to quickly determine the effects of currency movements.
- 💡Always read carefully whether a question is asking about the impact on a consumer, an importing producer, or an exporting producer.
- 💡Practice calculating the foreign currency price of a UK export before and after an exchange rate change to prove the effect on competitiveness.
- 💡You are not required to draw exchange rate diagrams in AQA GCSE Economics; concentrate on describing whether a currency appreciates or depreciates.
- 💡Link changes in interest rates directly to the demand for a currency through flows of foreign investment seeking higher returns.
- 💡Read scenarios carefully to determine whether an event affects the demand for the currency (exports or inward investment) or the supply (imports or outward investment).
Common Mistakes
- Stating that the government directly sets the exchange rate in the UK. Correction: Explain that the UK operates a floating exchange rate system where market forces of supply and demand determine the currency's value.
- Confusing the causes of demand and supply for a currency. Correction: Remember that exports create demand for the domestic currency, while imports create a supply of the domestic currency on foreign exchange markets.
- Assuming that a strong currency is always determined by having a strong economy. Correction: Recognise that exchange rates are determined by specific flows of money, such as interest rate differentials attracting hot money, not just general economic strength.
- Mistake: Assuming a strong currency is always beneficial for the whole economy. Correction: Recognise that while a strong currency benefits consumers buying imports, it harms the competitiveness of exporting producers.
- Mistake: Confusing the impact of depreciation on importers and exporters. Correction: Remember that depreciation makes exports cheaper (benefiting exporters) but imports dearer (harming importers).
- Mistake: Forgetting that producers can also be importers. Correction: Account for the fact that domestic producers often import raw materials, so a weak currency can increase their production costs.
- Mistake: Believing the government directly sets the exchange rate in a floating system. Correction: Understand that the exchange rate is determined solely by the interaction of buyers and sellers in the foreign exchange market.
- Mistake: Confusing the demand for a currency with the supply of it. Correction: Remember that demand comes from foreigners wanting the domestic currency, while supply comes from domestic residents selling it to buy foreign currency.
- Mistake: Assuming an increase in supply of a currency increases its value. Correction: Recognise that an outward shift in the supply curve of a currency leads to a depreciation of its exchange rate.