In AP Macro, a currency depreciates when it becomes less valuable in terms of another currency (EK MKT-5.A.2). Depreciation makes a country's exports cheaper and imports more expensive, so net exports rise and aggregate demand increases (EK MKT-5.F.2).
A currency depreciates when it loses value relative to another currency in the foreign exchange market. The exchange rate is just the price of one currency in terms of another (EK MKT-5.A.1), so depreciation means that price fell. If the U.S. dollar goes from buying 100 yen to buying 90 yen, the dollar depreciated against the yen. And here's the part the exam loves: when one currency depreciates, the other one automatically appreciates. They're two sides of the same trade.
Why does it happen? Anything that decreases demand for a currency (or increases its supply) in the forex market pushes its value down. Higher relative inflation, lower relative interest rates, or rising demand for foreign goods all cause depreciation. The payoff effect is on trade. A cheaper dollar makes American goods look like a bargain to foreigners, so exports rise. Meanwhile foreign goods cost Americans more, so imports fall. Net exports increase, which shifts aggregate demand to the right (EK MKT-5.F.2).
Depreciation lives in Unit 6 (Open Economy: International Trade and Finance), specifically Topic 6.2, where you define it (learning objective 6.2.A), and Topic 6.5, where you trace its effects on net exports and aggregate demand (learning objective 6.5.A). It's the bridge between the foreign exchange market graph and the AD-AS model. The exam constantly asks you to follow the full chain. Something shifts currency demand or supply, the currency depreciates, net exports rise, AD shifts right, and real output and the price level both increase. If you can run that chain in both directions (depreciation and appreciation), you've got the heart of Unit 6.
Keep studying AP® Macroeconomics Unit 6
Appreciation (Unit 6)
Appreciation is the mirror image. A currency appreciating means it buys more of another currency, which makes exports pricier and imports cheaper, so net exports fall. Every exchange rate question is really a two-currency seesaw: if the dollar depreciates against the euro, the euro appreciates against the dollar.
Net Exports and Aggregate Demand (Units 3 and 6)
Depreciation is one of the main shifters of AD from Unit 3. Cheaper currency means more exports, fewer imports, higher net exports, and a rightward AD shift. This is how the open economy plugs back into the AD-AS model you already know.
Interest Rates and Financial Capital Flows (Units 4 and 6)
When a central bank cuts interest rates, foreign investors earn less on that country's assets, demand for the currency falls, and the currency depreciates. This connects monetary policy from Unit 4 directly to exchange rates, and it's a favorite multi-step exam sequence.
Relative Inflation (Units 5 and 6)
If a country has higher inflation than its trading partners, its goods get relatively expensive, foreigners buy fewer of them, demand for its currency drops, and the currency depreciates. Depreciation then partially offsets the trade hit by making exports cheap again.
Depreciation shows up in multiple-choice questions as a chain-of-events problem. A typical stem gives you a trigger (a 15% depreciation, rapid productivity growth, high relative inflation, or a central bank raising rates) and asks for the correct sequence of effects on the currency, net exports, and aggregate demand. You need to run the logic without a graph in front of you. On free-response questions, open-economy SAQs regularly ask you to determine whether a currency appreciates or depreciates after a policy change or recession scenario, then explain what happens to exports, imports, and net exports. You may also need to draw the foreign exchange market graph, showing the demand or supply curve for a currency shifting and the equilibrium exchange rate falling. Always state the direction of the change AND the mechanism. "The dollar depreciates because demand for dollars falls, so U.S. exports become cheaper to foreigners and net exports rise" is the full-credit version.
Depreciation happens in a floating (flexible) exchange rate system when market forces of supply and demand push a currency's value down. Devaluation is when a government deliberately lowers its currency's value under a fixed exchange rate system. Same direction, different cause. AP Macro focuses on flexible rates, so 'depreciate' is almost always the word you want. Also don't confuse currency depreciation with capital depreciation (worn-out machines) from GDP accounting; they share a name but nothing else.
A currency depreciates when it becomes less valuable in terms of another currency, meaning the exchange rate (the price of that currency) has fallen.
Depreciation makes a country's exports cheaper for foreigners and imports more expensive at home, so net exports increase (EK MKT-5.F.2).
Higher net exports from depreciation shift aggregate demand to the right, raising real GDP and the price level.
When one currency depreciates, the other currency in the pair automatically appreciates, since the exchange rate is just a relative price.
Lower relative interest rates, higher relative inflation, and increased demand for foreign goods all cause a currency to depreciate.
Depreciation is market-driven under floating rates, while devaluation is a deliberate government action under fixed rates.
A currency depreciates when it becomes less valuable relative to another currency (EK MKT-5.A.2). If the dollar goes from buying 100 yen to 90 yen, the dollar depreciated against the yen.
Not necessarily. Depreciation makes exports cheaper and imports pricier, so net exports rise and aggregate demand increases, which can help close a recessionary gap. The downside is imports cost more, which can add inflationary pressure.
Depreciation is a market-driven drop in a currency's value under a floating exchange rate system. Devaluation is a government deliberately lowering the currency's value under a fixed system. AP Macro tests floating rates, so 'depreciate' is the term you'll use.
Anything that decreases demand for the currency or increases its supply in the foreign exchange market. The big three are lower relative interest rates, higher relative inflation, and increased domestic demand for foreign goods (which means supplying more of your currency to buy theirs).
No. Currency depreciation (Unit 6) is a fall in a currency's exchange-rate value. Capital depreciation (Unit 2) is the wearing out of physical capital like machines, used to distinguish gross from net investment. Same word, totally different concepts.
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