In AP Macro, demand for a currency is the quantity of that currency foreigners want to buy at each exchange rate, driven by demand for the country's goods, services, and financial assets. It graphs as a downward-sloping curve, showing the inverse relationship between the exchange rate and quantity demanded (LO 6.3.A).
Demand for a currency is exactly what it sounds like, but with one twist that trips people up. The demand for U.S. dollars doesn't come from Americans. It comes from foreigners who need dollars to buy American stuff. A French company importing U.S. soybeans, a Japanese tourist visiting New York, a British investor buying U.S. Treasury bonds. All of them have to trade their own currency for dollars first, and that's what creates dollar demand in the foreign exchange (FOREX) market.
Per the CED, demand for a currency "arises from the demand for the country's goods, services, and financial assets" and shows an inverse relationship between the exchange rate and quantity demanded. The intuition is the same as any demand curve. When the dollar gets cheaper (depreciates), American goods become a bargain for foreigners, so they buy more dollars. When the dollar gets pricier (appreciates), American exports look expensive, so quantity demanded falls. That gives you a normal downward-sloping demand curve, just with "exchange rate" on the vertical axis instead of price.
This term lives in Topic 6.3 (Foreign Exchange Market) in Unit 6: Open Economy—International Trade and Finance, and it's the first half of learning objective AP Macro 6.3.A, which asks you to define the FOREX market, demand for currency, and supply of currency. It then feeds directly into 6.3.B (finding the equilibrium exchange rate where quantity demanded equals quantity supplied) and 6.3.C (showing how shortages and surpluses push the exchange rate back to equilibrium).
The payoff is bigger than one topic, though. Shifting the demand curve for a currency is how AP Macro explains currency appreciation and depreciation, which then loops back into net exports and aggregate demand. If you can't draw and shift this curve, the second half of Unit 6 falls apart. Head to the 6.3 Foreign Exchange Market study guide for the full graph walkthrough.
Keep studying AP Macroeconomics Unit 6
Supply of a Currency (Unit 6)
These are mirror images. Demand for dollars comes from foreigners buying American things; supply of dollars comes from Americans buying foreign things and paying in other currencies. Here's the cheat code for FOREX graphs with two countries: demand for one currency IS the supply of the other. When Europeans demand dollars, they're supplying euros.
Currency Appreciation (Unit 6)
An increase in demand for a currency raises its equilibrium exchange rate, which is the definition of appreciation. Almost every FOREX exam question is really asking you to trace this chain: something makes U.S. assets or exports more attractive, demand for dollars shifts right, the dollar appreciates.
Monetary Policy and Interest Rates (Units 4-5)
This is the big cross-unit link. When the Fed shrinks the money supply and U.S. interest rates rise, U.S. bonds pay more, so foreign investors demand more dollars to buy them. Monetary policy at home shifts the currency demand curve abroad. AP loves chaining these two graphs together.
Net Exports and Aggregate Demand (Units 3 and 6)
The loop closes here. Higher currency demand appreciates the dollar, which makes U.S. exports pricier for foreigners, which lowers net exports and shifts AD left. One demand shift in the FOREX market ripples all the way back to output and the price level.
This shows up constantly in Unit 6 multiple choice, usually in two flavors. The first is the direct cause-and-effect stem, like "What happens to the exchange rate when demand for a currency increases?" (it appreciates) or "What happens to equilibrium if demand for a currency decreases?" (it depreciates). The second is the scenario stem, like "Which of the following would most likely cause the Japanese yen to appreciate in a floating exchange rate system?" where you have to recognize that higher Japanese interest rates or more foreign demand for Japanese goods shifts yen demand right.
On FRQs, expect to draw a correctly labeled FOREX graph: exchange rate on the vertical axis, quantity of the currency on the horizontal, downward-sloping demand, upward-sloping supply. Then you shift the demand curve based on the scenario and state whether the currency appreciates or depreciates. The most common point-loser is shifting the wrong curve, so always ask first: is this foreigners buying this country's stuff (demand) or this country buying foreign stuff (supply)?
Demand for a currency comes from people OUTSIDE the country who need it to buy that country's goods, services, and financial assets, and it slopes downward. Supply of a currency comes from people INSIDE the country trading it away to make payments in other currencies, and it slopes upward. Quick test: if Americans are doing the buying abroad, that's dollar supply, not dollar demand. Mixing these up means you shift the wrong curve and get appreciation and depreciation backwards.
Demand for a currency comes from foreigners wanting to buy that country's goods, services, and financial assets, not from people inside the country.
The demand curve for a currency slopes downward because a cheaper currency makes that country's exports and assets a better deal, so quantity demanded rises.
An increase in demand for a currency shifts the demand curve right and causes the currency to appreciate; a decrease shifts it left and causes depreciation.
Higher domestic interest rates attract foreign investors to a country's financial assets, increasing demand for its currency. This is the main bridge between monetary policy and exchange rates.
In a two-country FOREX problem, demand for one currency is simultaneously the supply of the other currency.
Equilibrium in the FOREX market occurs where quantity demanded equals quantity supplied, and market forces eliminate any shortage or surplus of the currency (LO 6.3.B and 6.3.C).
It's the quantity of a currency that foreigners want to buy at each exchange rate so they can purchase that country's goods, services, and financial assets. Per learning objective AP Macro 6.3.A, it shows an inverse relationship between the exchange rate and quantity demanded.
No, and this is the most common mix-up in Topic 6.3. Dollar demand comes from foreigners who need dollars to buy U.S. exports or U.S. financial assets like Treasury bonds. When Americans buy foreign goods, that creates dollar supply, not dollar demand.
Demand arises from foreigners buying the country's goods, services, and assets, and it slopes downward. Supply arises from residents making payments in other currencies, and it slopes upward. They meet at the equilibrium exchange rate.
The currency appreciates. The demand curve shifts right, raising the equilibrium exchange rate, which is one of the most frequently tested cause-and-effect chains in Unit 6 multiple choice.
Higher interest rates mean a country's bonds and other financial assets pay better returns, so foreign investors buy more of them. To do that, they must first buy the country's currency, shifting demand right and appreciating the currency. This is how Fed policy from Unit 4-5 connects to exchange rates in Unit 6.