Monetary policy measures: changes in foreign exchange rate
Government and the Macro‑Economy: Monetary Policy
Monetary Policy Measures: Changes in the Foreign Exchange Rate
What is a foreign exchange rate? It’s the price of one currency in terms of another, like how many pounds (£) you get for one US dollar ($). Think of it as a price tag on a foreign toy.
When the exchange rate changes, the value of a country’s currency moves up or down. This can be caused by the central bank’s actions or by market forces.
How Central Banks Influence the Exchange Rate
- Open‑Market Operations (OMO) – Buying or selling government bonds to change the money supply. Buying bonds injects money, usually weakening the currency.
- Reserve Requirements – Changing the amount banks must hold. Lowering requirements releases more money, often depreciating the currency.
- Direct Intervention – The central bank buys or sells its own currency in the foreign exchange market. Buying its currency strengthens it.
- Forward Guidance – Communicating future policy intentions to influence expectations and, consequently, the exchange rate.
Why Governments Care About Exchange Rate Changes
- Exports & Imports – A weaker currency makes exports cheaper and imports more expensive, boosting domestic production.
- Inflation – A stronger currency can lower import‑price inflation, keeping prices stable.
- Debt Servicing – Countries with foreign‑currency debt benefit when their currency weakens, as the debt cost in domestic terms rises.
- Investor Confidence – Stable exchange rates attract foreign investment, fueling growth.
Exam Tip Box
When answering questions about exchange rate changes:
- Identify the policy tool used (OMO, reserve requirement, intervention).
- Explain the mechanism – how the tool changes the money supply or market expectations.
- Show the impact on the exchange rate (strengthening or weakening).
- Link the exchange rate effect to macroeconomic outcomes (exports, inflation, debt).
Use the “cause → effect → macro outcome” structure for clarity.
Illustrative Example: The UK and the Euro
Suppose the Bank of England (BoE) wants to strengthen the pound (£) to reduce inflation. It could:
- Sell £ in the foreign exchange market, buying euros (€).
- Increase the reserve requirement for banks, pulling money out of circulation.
Result: £ appreciates against €, making UK imports cheaper and reducing import‑price inflation. However, UK exporters might face a £‑strengthening disadvantage.
Key Formulae
| Symbol | Meaning |
|---|---|
| $E$ | Exchange rate (domestic currency per unit of foreign currency) |
| $M$ | Money supply |
| $P$ | Price level |
Remember: $E$ is inversely related to $M$ in the short run – more money supply tends to lower the value of the currency.
Quick Quiz (for self‑testing)
- What happens to the exchange rate if the central bank sells domestic bonds?
- Explain how a stronger currency can help control inflation.
- Why might a country deliberately weaken its currency?
Answer these in a short paragraph each, using the cause → effect → macro outcome structure.
Revision
Log in to practice.