Economics · 12th Grade · The Global Economy · Weeks 19-27

Foreign Exchange Markets

How the value of the dollar is determined against other currencies in a flexible exchange rate system.

• Common Core State Standards
• C3: D2.Eco.14.9-12
• C3: D2.Eco.15.9-12

About This Topic

The foreign exchange market is where currencies are bought and sold, determining the exchange rate between any two national currencies. In a flexible, or floating, exchange rate system like the one the US operates under, the exchange rate is set by supply and demand. Demand for dollars comes from foreigners wanting to buy US goods, services, or financial assets; supply of dollars comes from Americans wanting to buy foreign goods, services, or assets. The interaction of these flows determines the dollar's value against other currencies.

For 12th-grade students, foreign exchange connects the macroeconomy to international finance in a concrete way. When the Federal Reserve raises interest rates, it increases the return on dollar-denominated assets, attracting foreign capital and appreciating the dollar. When the US runs a trade deficit, it supplies more dollars to foreign exchange markets, putting downward pressure on the dollar's value. These connections tie monetary policy, trade policy, and capital flows into a unified framework.

Active learning through supply and demand graphing exercises applied to currency markets reinforces that exchange rates are determined by the same principles students already know, just applied to a new market. Role-play scenarios where students represent traders responding to economic news events make the dynamics of exchange rate movements tangible.

Key Questions

1. Explain how supply and demand determine exchange rates.
2. Analyze the factors that cause a currency to appreciate or depreciate.
3. Predict the impact of changes in interest rates on currency values.

Learning Objectives

• Analyze the interaction of supply and demand curves to determine equilibrium exchange rates for major currencies.
• Evaluate the impact of changes in a nation's interest rates on its currency's appreciation or depreciation.
• Predict the effect of international trade imbalances on a country's currency valuation.
• Compare the relative strengths of a currency based on factors like inflation, economic growth, and political stability.
• Explain how central bank policies influence foreign exchange market dynamics.

Before You Start

Supply and Demand

Why: Students must understand the basic principles of how prices are determined by the interaction of buyers and sellers in a market.

Introduction to Macroeconomics

Why: Students need foundational knowledge of concepts like interest rates, inflation, and trade balances to understand their impact on currency values.

Key Vocabulary

Exchange Rate	The value of one nation's currency expressed in terms of another nation's currency.
Appreciation	An increase in the value of a currency relative to other currencies, meaning it can buy more foreign currency than before.
Depreciation	A decrease in the value of a currency relative to other currencies, meaning it can buy less foreign currency than before.
Floating Exchange Rate	An exchange rate system where a currency's value is determined by the free market forces of supply and demand, without direct government intervention.
Capital Flows	The movement of money for the purpose of investment, trade, or business between countries.

Watch Out for These Misconceptions

Common Misconception

A country's exchange rate is set by its government.

What to Teach Instead

Under a floating exchange rate system, the government does not set the rate; it is determined by market supply and demand. Governments can intervene by buying or selling their own currency, and some countries do peg their rates administratively, but the US operates under a freely floating system where the Fed's influence on exchange rates is indirect, through interest rate effects on capital flows, not direct price-setting.

Common Misconception

A high exchange rate is always good for a country.

What to Teach Instead

A strong exchange rate makes imports cheaper and reduces inflation, benefiting consumers and import-dependent businesses. But it also makes exports more expensive in foreign markets, hurting export industries. The net effect depends on the structure of the economy and what policy goals are being prioritized. There is no universally 'good' exchange rate level.

Common Misconception

Exchange rates only matter for international travelers.

What to Teach Instead

Exchange rate movements affect the prices of thousands of goods in domestic markets, the competitiveness of export-oriented industries, the profitability of multinational corporations, and the returns on foreign investments. For the US, a dollar appreciation equivalent to a 10% tariff affects the trade balance more than most trade policy changes. Helping students find examples of exchange rate effects in their own consumer experience makes the broad relevance tangible.

Active Learning Ideas

Graphing Activity: Shifting Forex Supply and Demand

Pairs receive a supply and demand diagram for dollars in the foreign exchange market. They are given six scenarios, such as a US interest rate hike, a surge in US imports, and a foreign recession reducing demand for US exports. For each scenario, pairs shift the appropriate curve, identify the direction of exchange rate change, and explain the mechanism in one sentence.

35 min·Pairs

Simulation Game: Forex Trading Floor

Assign students to be traders representing different countries. Announce a series of economic events (Fed rate hike, US recession, oil price spike) and have students call out whether they want to buy or sell dollars. Track the 'price' of a dollar in euros on the board after each announcement and debrief by connecting each price move to the underlying supply and demand shift.

40 min·Whole Class

Think-Pair-Share: Interest Rates and the Dollar

Present the scenario: the Fed unexpectedly raises the federal funds rate by 0.5%. Students individually trace the chain of effects from higher rates to capital flows to dollar demand to exchange rate. Pairs compare their chains and identify where they diverge. The class builds a consensus causal map on the board.

20 min·Pairs

Real-World Connections

• A U.S. tourist planning a trip to Japan must consider the current USD to JPY exchange rate to budget for hotels, meals, and souvenirs, as a stronger dollar means their money goes further.
• An American company exporting automobiles to Europe is affected by the EUR to USD exchange rate; a weaker euro makes their cars more expensive for European buyers, potentially reducing sales.
• International investors deciding where to allocate funds analyze exchange rate forecasts. A hedge fund manager might shift investments from the UK to the U.S. if they predict the USD will appreciate against the GBP.

Assessment Ideas

Quick Check

Present students with a scenario: 'The U.S. Federal Reserve unexpectedly raises interest rates.' Ask them to draw the supply and demand curves for USD in the foreign exchange market and explain, in writing, how this event is likely to affect the dollar's exchange rate against the Euro.

Discussion Prompt

Facilitate a class discussion using the prompt: 'Imagine a country experiences high inflation while its trading partner has low inflation. Using the concepts of supply and demand for currency, predict how this inflation differential will likely impact the first country's currency exchange rate and its balance of trade.'

Exit Ticket

Provide students with a news headline, e.g., 'China sells large amounts of U.S. Treasury bonds.' Ask them to identify whether this action would likely cause the USD to appreciate or depreciate and to briefly explain their reasoning based on currency supply and demand.

Frequently Asked Questions

How does supply and demand determine the exchange rate?

Demand for a currency comes from foreign buyers wanting to purchase goods, services, or financial assets denominated in that currency. Supply comes from domestic buyers seeking foreign currency for the same purposes. Where supply equals demand sets the exchange rate. Any factor that shifts these flows, such as interest rate changes, trade balances, or investor sentiment, moves the exchange rate.

What causes a currency to appreciate?

Currency appreciation occurs when demand for the currency increases or supply decreases. Common causes include higher domestic interest rates (attracting foreign capital), stronger economic growth (drawing investment), increased exports (foreigners need the currency to pay), or reduced domestic inflation (making the currency's purchasing power more attractive relative to alternatives).

How do interest rate changes affect exchange rates?

When a country raises interest rates, it offers higher returns on deposits and bonds denominated in its currency. Foreign investors shift capital toward those assets, increasing demand for the currency and pushing the exchange rate up. This is a key channel through which Federal Reserve rate decisions affect the entire US economy's trade position.

How does active learning help students understand foreign exchange markets?

Forex supply and demand involves multiple simultaneous drivers, interest rates, trade flows, and capital movements, that students easily conflate. Graphing activities that isolate each driver and trading simulations that react to economic news events help students build the causal chains one step at a time. The simulation's immediate feedback of watching the 'dollar price' move after each announcement is far more engaging than diagramming alone.