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# Exchange Rate and Its Economic Effects
Chapter 9 · International Trade · Unit 4 · Revision Notes
### Crux First
- Exchange rate means the rate at which the currency of one country exchanges for the currency of another country.
- In direct quote, domestic currency is expressed per unit of foreign currency. In indirect quote, foreign currency is expressed per unit of domestic currency.
- Nominal exchange rate tells currency price. Real exchange rate tells relative goods price.
- Real exchange rate = Nominal exchange rate × Domestic price index / Foreign price index.
- Two extreme exchange rate regimes are floating exchange rate and fixed exchange rate.
- Managed float lies between the two because market forces operate, but the government or central bank also intervenes.
- Under floating exchange rate, demand and supply of foreign exchange determine the rate.
- Increase in demand for foreign currency causes home currency depreciation. Increase in supply of foreign currency causes home currency appreciation.
- Depreciation and appreciation are market-driven changes under floating regime. Devaluation and revaluation are official changes under fixed regime.
- Depreciation generally helps exports and hurts imports. Appreciation does the opposite.
## 1. Meaning of Exchange Rate
Exchange rate is the rate at which the currency of one country exchanges for the currency of another country. Since international transactions involve residents of different countries, payments cannot be completed unless one currency is converted into another. This is why foreign exchange has a central place in international trade, international investment, lending, borrowing and financial settlements.
A foreign currency transaction exists when a transaction is denominated in a foreign currency or requires settlement in a foreign currency. This includes purchase or sale of goods and services priced in foreign currency, borrowing or lending in foreign currency, forward contracts and foreign currency assets or liabilities.
## 2. Direct Quote, Indirect Quote and Cross Rate
A direct quote expresses the domestic currency price of one unit of foreign currency. For example, ₹65 per US dollar means one dollar costs sixty-five rupees. In a direct quotation, foreign currency is the base currency and domestic currency is the counter currency. This is the format most students encounter in Indian examples.
An indirect quote expresses the foreign currency price of one unit of domestic currency. For example, $0.0151 per rupee means one rupee can buy 0.0151 dollar. In an indirect quotation, domestic currency becomes the base currency and foreign currency becomes the counter currency.
A cross rate is derived from two different currency pairs through a common third currency. If the exchange rates of currency X with Y and X with Z are known, then the rate between Y and Z can be calculated as a cross rate.
- Concept | Meaning | Example
- Direct quote | Units of domestic currency per unit of foreign currency | ₹65 per US$
- Indirect quote | Units of foreign currency per unit of domestic currency | $0.0151 per ₹1
- Cross rate | Rate between two currencies derived from another pair | Calculated through a common currency
## 3. Exchange Rate Regime: Meaning
An exchange rate regime is the system by which a country manages the value of its currency in relation to foreign currencies. In simple terms, it tells us how the value of domestic currency is determined and how much role the government or central bank plays in that process.
The basic issue is not whether demand and supply matter. They always matter. The real issue is the extent to which market forces alone determine the exchange rate and the extent to which the state intervenes to influence or fix it.
## 4. Broad Categories of Exchange Rate Systems
At one extreme lies the free-floating system, where exchange rates are determined by private market forces and the government does not participate in the market. At the other extreme lies the fixed exchange rate system, where the government or central bank sets the currency value through official policy. Between these two lies the managed float system, where market forces determine the rate but the authorities intervene from time to time to influence movement.
## 5. Floating Exchange Rate Regime
Under a floating exchange rate regime, also called a flexible exchange rate, the value of a currency is determined by demand for and supply of that currency in the foreign exchange market. The government or central bank does not maintain a fixed par value. The exchange rate is therefore market-determined.
The main advantage of a floating regime is that it is self-regulating. Exchange rate changes act as a buffer against international shocks. If foreign demand for a country’s exports rises strongly, the demand for that country’s currency rises too, causing the currency to appreciate. This appreciation partly offsets the initial increase in export demand by making exports costlier to foreigners.
The biggest weakness of a floating regime is uncertainty. Since rates can fluctuate unpredictably, contracts involving imports, exports, loans and foreign investment become riskier. This raises the cost of international business.
## 6. Managed Float System
A managed float is a floating system in which governments or central banks intervene in the foreign exchange market in an attempt to influence the value of their currency. The rate is still not fully fixed, but it is not left completely alone either. The monetary authority may buy or sell domestic currency to prevent very sharp swings or to guide the exchange rate toward a desired band.
The purpose of such intervention is usually stability rather than complete control. If a currency rises too fast, authorities may sell that currency to slow appreciation. If it falls too fast, they may buy it to provide support. The effect of intervention may be limited, but expectations can also change when markets believe the central bank is serious.
## 7. Fixed Exchange Rate Regime
In a fixed exchange rate system, the exchange rate between two currencies is set by government policy. The central bank stands ready to maintain this rate by intervening in the foreign exchange market and by using reserves. A fixed exchange rate is also called a pegged exchange rate because the domestic currency is pegged to another currency, a basket of currencies or some standard such as gold.
A fixed regime gives stability to international transactions because exchange rate fluctuations are either removed or kept within narrow limits. But stability comes at a cost. The central bank must maintain adequate reserves and cannot enjoy the same freedom in monetary policy that it would have under a floating system.
## 8. Fixed versus Floating: Main Comparison
A fixed exchange rate avoids large currency fluctuations, reduces exchange rate risk and transaction cost, encourages trade and investment, and can help lower inflation. It also improves monetary credibility. The problem is that the central bank must keep reserves and remain ready to intervene continuously.
A floating exchange rate gives greater policy flexibility. The central bank is not forced to defend a fixed rate and can pursue independent monetary policy more easily. It also need not maintain massive reserves solely for exchange rate defence. The problem is that volatility creates uncertainty and adds risk to international transactions.
- Basis | Fixed Exchange Rate | Floating Exchange Rate
- Rate determination | Officially set or strongly pegged | Market-determined
- Policy flexibility | Low | High
- Need for reserves | High | Lower
- Stability | More stable | Less stable
- Risk in international transactions | Lower | Higher
#### Key Recall
Fixed rate gives stability but less flexibility. Floating rate gives flexibility but less stability.
## 9. Nominal versus Real Exchange Rate
Nominal exchange rate is the rate at which one currency can be exchanged for another currency. It tells us the currency price, but it does not directly tell us the relative price of goods between countries. Trade flows are ultimately influenced not merely by nominal rates but by real exchange rates.
The real exchange rate tells how many goods and services of one country can be exchanged for goods and services of another country. It incorporates both the nominal exchange rate and price levels in the two countries. This is why economists use real exchange rate to study competitiveness and trade performance.
Real Effective Exchange Rate, or REER, is the nominal effective exchange rate adjusted by relative prices or costs. An increase in REER means exports become relatively more expensive and imports relatively cheaper, indicating loss of trade competitiveness.
## 10. Foreign Exchange Market: Meaning and Participants
The foreign exchange market is the wide network of markets and institutions that handle exchange of foreign currencies. It is not one physical marketplace. It operates as an over-the-counter electronically connected system in which banks, brokers, financial institutions, firms, governments and private investors transact in currencies.
Commercial banks are major participants because they execute orders for exporters, importers and investors and also trade on their own account. Brokerage houses connect major institutions. These active players often influence price formation and are called market makers. Other participants, such as firms, tourists, hedgers and investors, are more passive in the sense that they generally accept rates quoted by active market players.
## 11. Spot Market, Forward Market and Vehicle Currency
Foreign exchange transactions can be current transactions or future transactions. Current transactions are carried out in the spot market, where delivery is immediate or near immediate. The rate used for such transactions is called the spot exchange rate. Future transactions are carried out through forward or futures arrangements where currencies are bought or sold for delivery at a future date.
A forward exchange rate is the rate quoted today for a transaction that will be settled in future. If the forward rate is above the spot rate, the currency is said to be at a forward premium. If the forward rate is below the spot rate, it is said to be at a forward discount.
Many international transactions are denominated in U.S. dollars even when neither party is American. Because of this role, the dollar is often called a vehicle currency.
## 12. Arbitrage and Price Equality Across Markets
At a given point of time, all markets tend to have nearly the same exchange rate for a given currency because of arbitrage. Arbitrage means making riskless profit by exploiting price differences for the same asset in different markets. If the same currency is cheaper in one market and dearer in another, traders buy where it is cheap and sell where it is expensive. This quickly pushes prices toward equality.
## 13. Determination of Nominal Exchange Rate
In the domestic foreign exchange market, the exchange rate is determined by demand for and supply of foreign exchange. Demand for foreign currency arises when residents want to buy imports, make unilateral transfers abroad, invest abroad, purchase foreign financial assets, open foreign bank accounts, acquire foreign real assets or undertake speculation and hedging. Supply of foreign currency arises from exports, foreign remittances, foreign investments, investment income inflows, deposits and speculation in the opposite direction.
Like a standard market, the foreign exchange market has a downward-sloping demand curve and an upward-sloping supply curve. The equilibrium exchange rate is determined where demand and supply intersect.
## 14. Demand Shift and Home Currency Depreciation
If demand for foreign currency increases while supply remains unchanged, the demand curve for foreign exchange shifts rightward. The equilibrium exchange rate rises in direct quotation terms. This means more units of domestic currency are now required to buy one unit of foreign currency. In such a case, home currency depreciates.
For example, if Indians demand more dollars because imports from the United States rise, then the demand for dollars increases in the Indian foreign exchange market. As the rupee price of dollar rises, the rupee depreciates and the dollar appreciates.
## 15. Supply Shift and Home Currency Appreciation
If supply of foreign exchange increases while demand remains unchanged, the supply curve shifts rightward. The equilibrium exchange rate falls in direct quotation terms. This means fewer units of domestic currency are needed to buy one unit of foreign currency. In such a case, home currency appreciates.
For example, if remittances from abroad rise strongly, more foreign currency flows into the home country. This increases supply of foreign exchange and supports appreciation of the domestic currency.
#### Most Important Diagram Logic
Rightward shift in demand for foreign currency causes home currency depreciation. Rightward shift in supply of foreign currency causes home currency appreciation.
## 16. Appreciation and Depreciation
Appreciation and depreciation describe market-driven changes in exchange rate under a floating system. Home currency appreciates when its value rises relative to another currency. In direct quote terms, appreciation means the domestic currency price of foreign currency falls. Home currency depreciates when its value falls relative to another currency. In direct quote terms, depreciation means the domestic currency price of foreign currency rises.
If the exchange rate moves from $1 = ₹70 to $1 = ₹75, then more rupees are required to buy one dollar. This means the rupee has depreciated and the dollar has appreciated. Whenever one currency depreciates against another, the other currency appreciates against the first.
## 17. Devaluation versus Depreciation
Devaluation is an official deliberate reduction in the value of a currency under a fixed or nearly fixed exchange rate regime. It is a policy action taken by the monetary authority. Revaluation is the opposite, that is, an official increase in the currency value under a fixed regime.
Depreciation and appreciation, in contrast, are changes caused by market forces under a floating exchange rate regime and do not arise from an official policy action. This distinction is basic but very important in exams.
- Concept | Meaning | Regime
- Depreciation | Market-driven fall in currency value | Floating
- Appreciation | Market-driven rise in currency value | Floating
- Devaluation | Official reduction in currency value | Fixed
- Revaluation | Official increase in currency value | Fixed
## 18. Economic Effects of Currency Depreciation
Currency depreciation lowers the relative price of exports and raises the relative price of imports. Foreigners find the country’s exports cheaper, while domestic residents find imports more expensive. This tends to divert demand toward domestic goods and improve demand for exports. If the economy has enough productive capacity, output and employment may rise and overall economic activity may expand.
Exporters generally gain because foreign currency earnings convert into more domestic currency. Importers suffer because they must pay more domestic currency for the same amount of foreign goods. Firms with foreign currency debt also suffer because repayment burden rises in domestic currency terms. Currency depreciation may therefore strengthen export competitiveness and output, but weaken balance sheets of foreign-currency borrowers.
Depreciation is also likely to create inflationary pressure. Imported consumer goods become more expensive, imported inputs become costlier and demand for domestic goods may rise. This can push both consumer inflation and cost-push inflation upward.
## 19. Economic Effects of Currency Appreciation
Currency appreciation raises the price of exports and lowers the price of imports. Domestic exports become less competitive in global markets, while foreign goods become cheaper for domestic buyers. This tends to reduce exports, increase imports and weaken aggregate demand. If the economy is already slowing, appreciation can worsen the slowdown and raise unemployment.
At the same time, appreciation can reduce inflation because imported consumer goods, capital goods, components and raw materials become cheaper. Living standards may improve due to access to cheaper imported goods. Appreciation also encourages firms to become more efficient through cost reduction and technology adoption if they want to retain competitiveness.
The current account effect of appreciation depends on price elasticity of demand for exports and imports. If export demand is highly elastic, appreciation can reduce export earnings significantly and worsen the trade balance.
## 20. Effects on Current Account, Capital Flows and Fiscal Health
Exchange rate movements affect current account balance because they change export earnings and import payments. If depreciation raises export earnings faster than it raises import spending, the current account may improve. If import payments rise sharply and exports do not respond enough, the current account may worsen.
Exchange rate volatility also affects foreign investment. Foreign investors become cautious when currency fluctuations are large, especially if the domestic currency is weakening sharply. Portfolio inflows and even direct investment may slow. Companies with external commercial borrowings face higher repayment burden if the domestic currency depreciates and they have not hedged the risk properly. Countries with significant foreign currency public debt also face increased debt servicing burden when their currency weakens.
## 21. Quick Recall Grid
- Concept | Best Recall Line
- Exchange rate | Price of one currency in terms of another
- Direct quote | Domestic currency per unit of foreign currency
- Indirect quote | Foreign currency per unit of domestic currency
- Floating rate | Market-determined exchange rate
- Fixed rate | Officially pegged exchange rate
- Managed float | Market rate with government or central bank intervention
- Nominal exchange rate | Currency price
- Real exchange rate | Relative goods price across countries
- REER | Nominal effective exchange rate adjusted for relative prices
- Depreciation | Market-driven fall in home currency value
- Appreciation | Market-driven rise in home currency value
- Devaluation | Official fall in fixed exchange rate value
- Arbitrage | Riskless profit from price difference across markets
- Vehicle currency | Widely used international contract currency even if it belongs to neither party
## 22. Final Revision Notes
This unit becomes simple once the chain is kept clear. First understand what exchange rate means. Then separate direct quote, indirect quote and real exchange rate. After that, classify exchange rate regimes into floating, managed float and fixed. Then learn foreign exchange market participants and spot-forward distinction. Next understand how demand and supply determine the nominal exchange rate. Finally, lock the difference between depreciation and devaluation and connect exchange rate changes with exports, imports, inflation, output, debt burden and capital flows.
#### Last-Minute Distinctions
Direct quote is domestic currency per unit of foreign currency. Increase in demand for foreign currency causes home currency depreciation. Increase in supply of foreign currency causes home currency appreciation. Depreciation is market-driven. Devaluation is policy-driven. Real exchange rate differs from nominal exchange rate because it adjusts for prices.