Foreign Exchange Market and International Trade: Study Notes

Module 2: Aggregate Demand and Aggregate Supply

Foreign Exchange Market (Forex Market)

The foreign exchange market, commonly referred to as the Forex market, is a highly aggregated market that coordinates the actions of residents demanding foreign currencies and foreigners supplying foreign currencies in exchange for domestic currency. It plays a crucial role in international trade and finance.

• Exchange Rate: The price of one unit of a currency in terms of another currency. For example, the price of one euro (€1) in terms of U.S. dollars.

• Quotation Conventions: Exchange rates can be quoted in two ways, e.g., $1.17/€1 or €0.85/$1.

• Example: If $1 = 20 Mexican Pesos, then a $40 dress shirt costs 800 Pesos.

International Trade Terminology

Understanding the basic terms of international trade is essential for analyzing the effects of exchange rates and capital flows.

• Exports: Foreign purchases of domestically produced products. Influenced by foreign income and relative prices.

• Imports: Domestic purchases of products produced abroad. Influenced by domestic income and relative prices.

• Net Exports: $\text{Net Exports} = \text{Exports} - \text{Imports}$

• Trade Deficit: Imports > Exports ($\text{Net Exports} < 0$)

• Trade Surplus: Exports > Imports ($\text{Net Exports} > 0$)

Appreciation and Depreciation of Currency

Currency values fluctuate in the foreign exchange market, affecting purchasing power and trade.

• Appreciation: Increase in the value of domestic currency relative to a foreign currency. Example: $1.10/€1 to $1.07/€1 (fewer dollars needed per euro).

• Depreciation: Decrease in the value of domestic currency relative to a foreign currency. Example: $1.07/€1 to $1.12/€1 (more dollars needed per euro).

• Effect: Appreciation increases purchasing power; depreciation decreases it.

Role of Exchange Rate in Foreign Exchange Market

The exchange rate is central to the functioning of the foreign exchange market, affecting both trade and capital flows.

• Buying foreign goods/assets generates demand for foreign currency and supply of domestic currency.

• Selling goods/assets to foreigners generates supply of foreign currency and demand for domestic currency.

• Equilibrium Exchange Rate: Achieved when the quantity of foreign currency demanded equals the quantity supplied.

Equilibrium in Foreign Exchange Market

The equilibrium exchange rate is determined by market forces of demand and supply for currencies.

• Demand for a currency is influenced by trade and capital flows.

• Supply of a currency is similarly influenced.

Effects of Exchange Rate on Trade

Exchange rate movements have direct effects on a country's exports, imports, and net exports.

• If the domestic currency depreciates, exports rise and imports fall, increasing net exports ($\text{NX} \uparrow$).

• Depreciation makes foreign goods more expensive for domestic residents and domestic goods cheaper for foreigners.

Capital Flows

Capital flows refer to the movement of financial and real assets across borders.

• Capital Inflow: Acquisition of domestic assets by foreigners.

• Capital Outflow: Acquisition of foreign assets by domestic residents.

• Net Capital Inflow: $\text{Net Capital Inflow} = \text{Capital Inflow} - \text{Capital Outflow}$

Link Between Trade and Capital Flows

Trade balances are closely linked to capital flows in the foreign exchange market.

• When the foreign exchange market is in equilibrium: $\text{Imports} + \text{Capital Outflow} = \text{Exports} + \text{Capital Inflow}$

• Rearranged: $\text{Imports} - \text{Exports} = \text{Capital Inflow} - \text{Capital Outflow}$

• Trade deficits are associated with net inflow of capital; trade surpluses with net outflow.

Exchange Rate in the News

Real-world events, such as government interventions, can cause significant changes in exchange rates. For example, coordinated interventions by the U.S. and Japan led to a sharp weakening of the U.S. dollar against the yen.

• Such events highlight the importance of exchange rates in international economics.

Data Exploration Activity

Students are encouraged to explore current and historical exchange rate data using online resources such as Yahoo!Finance and Google. Understanding currency quotation conventions is essential for accurate interpretation.

• Example: EUR/USD refers to the number of U.S. dollars per one euro; USD/JPY refers to the number of Japanese yen per one U.S. dollar.

Economics Joke

Humor is sometimes used in economics lectures to lighten the mood. For example:

• "What currency do they use in space? Starbucks."

Note: While jokes are not directly relevant to macroeconomic concepts, they can be used to engage students.

Additional info: All equations are provided in LaTeX format as required. The image included is directly relevant to the economics joke section and is used to illustrate the use of humor in economics education.