Exchange Rates (Copy)

Overview:

• Exchange rates are pivotal in determining a country’s trade competitiveness, influencing imports, exports, and overall economic stability.
• Key focus areas:
  1. Measuring exchange rates (nominal, real, and trade-weighted).
  2. Systems for exchange rate determination (fixed, floating, managed).
  3. Effects of exchange rate changes on external and internal economies.
  4. Key theoretical analyses: Marshall–Lerner condition and J-curve effect.

1. Measurement of Exchange Rates:

Nominal Exchange Rate:

• Definition: The value of one currency in terms of another (e.g., 1 USD = 160 PKR).
• Used in everyday transactions but does not consider inflation or relative price levels.

Real Exchange Rate:

• Formula: Real Exchange Rate=Nominal Exchange Rate×Domestic Price IndexForeign Price Indextext{Real Exchange Rate} = text{Nominal Exchange Rate} times frac{text{Domestic Price Index}}{text{Foreign Price Index}}
• Reflects changes in competitiveness by incorporating inflation differences.
• Example: If a country’s currency depreciates nominally but experiences higher inflation, its real exchange rate may increase, reducing export competitiveness.

Trade-Weighted Exchange Rate:

• Definition: An index measuring a currency’s value against a basket of other currencies, weighted by the relative importance of each trading partner.
• Example: For a country trading three times more with China than the US, the Chinese renminbi will hold thrice the weight compared to the US dollar.

2. Determination of Exchange Rates:

Fixed Exchange Rate System:

• A government sets and maintains a specific rate.
• Central banks intervene through:
  • Buying/selling foreign reserves.
  • Adjusting interest rates to attract or deter foreign investment.
• Advantages:
  • Provides stability for trade and investment.
  • Encourages discipline in domestic inflation management.
• Disadvantages:
  • High opportunity cost due to the need for large reserves.
  • Can conflict with other macroeconomic policies, like growth or employment.

Floating Exchange Rate System:

• Determined solely by market forces of supply and demand.
• Causes of Demand:
  • Purchase of goods/services or investments in a country.
  • Speculation on currency appreciation.
• Advantages:
  • Self-adjusting mechanism for trade imbalances.
  • Reduces the need for large foreign reserves.
• Disadvantages:
  • High volatility, creating uncertainty for businesses and investors.

Managed Exchange Rate System:

• A hybrid where market forces dominate but with occasional government intervention to stabilize large fluctuations.
• Example: Morocco’s central bank allows demand and supply to influence rates but intervenes during extreme shifts.

3. Adjustments in Fixed Exchange Rates:

Devaluation:

• Official reduction in a currency’s value.
• Makes exports cheaper, boosting demand and addressing trade deficits.
• Risks:
  • Cost-push inflation from expensive imports.
  • Retaliatory trade policies by partners.

Revaluation:

• Official increase in a currency’s value.
• Reduces inflationary pressures but risks export competitiveness and increased unemployment.

4. Effects of Exchange Rate Changes:

On Trade Balance:

• Marshall–Lerner Condition:
  • A devaluation improves the trade balance only if the sum of price elasticities of demand for exports and imports exceeds 1.
  • Example: If PED for exports = 0.6 and imports = 0.5, a devaluation would worsen the deficit.

J-Curve Effect:

• A depreciation initially worsens the trade balance due to inelastic demand for exports and imports.
• Over time, as demand becomes elastic, the trade balance improves.
• Example:
  • Short-term: Contracts lock import/export prices, limiting immediate effects.
  • Long-term: Firms and consumers adjust, shifting demand toward cheaper domestic goods.

On Domestic Economy:

• Inflation:
  • Depreciation increases import prices, causing cost-push inflation.
• Employment:
  • Export-led growth from a weaker currency can boost jobs in export industries.
• Investment:
  • Uncertainty from floating exchange rates may deter long-term investments.

5. Impacts of Exchange Rate Policy on Macroeconomic Goals:

Stability vs. Growth:

• Fixed rates offer predictability but limit flexibility to respond to shocks.
• Floating rates provide adaptability but can destabilize trade and investment decisions.

Internal vs. External Adjustments:

• A revaluation improves domestic inflation but worsens external competitiveness.
• A devaluation enhances exports but risks inflation and global trade relations.

6. Case Study: Ghana

• Exchange Rate Trends (2012–2018):
  • Persistent depreciation of the Ghanaian cedi against major trading partners’ currencies.
• Impact:
  • Depreciation narrowed the current account deficit by making exports (e.g., cocoa, gold) more competitive.
  • High inflation offset some benefits, emphasizing the role of real exchange rates.

7. Policy Recommendations:

• For fixed systems:
  • Ensure the fixed rate aligns closely with the long-term equilibrium rate to minimize intervention costs.
• For floating systems:
  • Monitor capital flows to prevent excessive volatility.
• General strategies:
  • Combine exchange rate policies with supply-side reforms to enhance productivity and competitiveness.