Unit 6 Test: Open Economy — International Trade and Finance
Practice AP Macroeconomics Unit 6. Test forex market graphs, exchange rates, balance of payments, and open-economy policy effects with College Board-style questions.
The Open Economy in AP Macroeconomics
Unit 6 adds the international dimension to macroeconomic analysis. The College Board-style exam frequently includes FRQs that require students to draw and shift the foreign exchange (forex) market, analyze the balance of payments, and trace the effects of domestic macroeconomic policy on exchange rates, net exports, and output. This unit is one of the most heavily tested in FRQ questions.
Balance of Payments
The balance of payments records all economic transactions between a country and the rest of the world. It has two main components:
- Current Account — Records trade in goods and services (trade balance), income flows, and current transfers. A current account deficit means a country imports more than it exports.
- Capital and Financial Account — Records cross-border investment flows, including purchases of financial assets and foreign direct investment. The current account deficit must be matched by a capital account surplus.
Exchange Rate Determination
The foreign exchange market determines currency exchange rates through supply and demand. In a forex market graph, the vertical axis shows the exchange rate (price of the domestic currency in terms of a foreign currency) and the horizontal axis shows the quantity of the domestic currency traded.
Currency Appreciation and Depreciation
- Appreciation — The domestic currency rises in value relative to a foreign currency. Appreciation makes imports cheaper and exports more expensive, reducing net exports (NX) and shifting AD to the left.
- Depreciation — The domestic currency falls in value. Depreciation makes exports cheaper for foreign buyers and imports more expensive domestically, increasing NX and shifting AD to the right.
Shifting the Forex Market
The demand for a country's currency increases when foreigners want to buy that country's goods, services, or assets. The supply of a currency increases when domestic residents want to purchase foreign goods or assets. AP FRQs commonly ask students to show how a change in interest rates, income, or inflation affects the exchange rate through the forex market diagram.
Macroeconomic Policy in an Open Economy
- Expansionary monetary policy lowers domestic interest rates, which reduces demand for domestic assets by foreign investors, decreasing demand for the currency, causing depreciation, and increasing net exports.
- Contractionary monetary policy raises interest rates, attracting foreign investment, increasing demand for the currency, causing appreciation, and reducing net exports.
- These open-economy effects can amplify or partially offset the domestic effects of monetary policy.
Key AP FRQ Skills for Unit 6
Students should be able to draw a correctly labeled forex market diagram, show the effect of a policy change on the exchange rate, and then trace the impact on net exports and aggregate demand. Multi-step FRQs in this unit often require linking the money market or loanable funds market to the forex market in sequence.