75 MCQs
50 Flashcards
Unit 5 · 6 marks weightage
Updated April 2026
Macroeconomics · Unit 5
Ch 11: Foreign Exchange Rate
Understand how exchange rates are determined, the difference between fixed and flexible systems, depreciation vs devaluation, and the forces of demand and supply in the foreign exchange market.
Foreign Exchange and Exchange Rate
Foreign Exchange refers to all currencies other than the domestic currency of a country. For India, any currency other than the Indian Rupee (USD, EUR, GBP, JPY etc.) is foreign exchange.
The Foreign Exchange Rate is the price of one currency expressed in terms of another currency. For example, if 1 USD = ₹83, then ₹83 is the exchange rate of the US dollar in terms of Indian Rupees.
Exchange rates matter enormously: they affect the cost of imports, the competitiveness of exports, inflation, and the balance of payments.
Fixed Exchange Rate System
Under the Fixed Exchange Rate system, the exchange rate is officially set and maintained by the government or central bank. The rate is kept constant (or within a narrow band) regardless of market forces.
Advantages:
- Certainty and stability — firms can plan imports and exports without exchange rate risk.
- Reduces speculation in the currency market.
- Helps maintain discipline in monetary policy.
Disadvantages:
- Requires large foreign exchange reserves to defend the fixed rate.
- Cannot adjust automatically to external shocks (trade imbalances persist).
- Overvalued currency can hurt exports; undervalued currency can cause inflation.
- May lead to currency crises if reserves run out (e.g., 1991 India crisis).
Flexible (Floating) Exchange Rate System
Under the Flexible Exchange Rate system, the exchange rate is determined entirely by the market forces of demand and supply of foreign currency. The government does not intervene.
Advantages:
- Automatic adjustment — a trade deficit causes currency depreciation, which makes exports cheaper and imports costlier, correcting the deficit over time.
- No need to maintain large foreign exchange reserves.
- Central bank is free to pursue independent monetary policy.
Disadvantages:
- Creates uncertainty — volatile exchange rates make international trade planning difficult.
- Encourages speculation, which can amplify currency movements.
- Imported inflation — if currency depreciates, import prices rise.
Managed Float (Dirty Float)
In practice, most countries including India operate a managed float — the exchange rate is largely market-determined, but the central bank (RBI in India) intervenes periodically to prevent excessive volatility or to achieve specific exchange rate targets.
Demand for Foreign Exchange
Demand for foreign exchange arises when Indian residents need to make payments to foreign entities. The demand curve for foreign exchange slopes downward — when foreign currency is cheaper (rupee is stronger), Indians buy more foreign goods and services.
Sources of demand for forex (outflows from India):
- Imports of goods and services
- Indians investing or travelling abroad
- Payment of interest on external debt
- Remittances sent abroad by immigrants living in India
- Indian students studying in foreign universities
Supply of Foreign Exchange
Supply of foreign exchange arises when foreign entities make payments to Indian residents. The supply curve of foreign exchange slopes upward.
Sources of supply of forex (inflows into India):
- Exports of goods and services
- Foreign Direct Investment (FDI) into India
- Foreign Institutional Investment (FII) / Portfolio investment
- Remittances sent to India by NRIs
- Foreign tourists visiting India
- External commercial borrowings by Indian firms
Depreciation vs Devaluation (and Appreciation vs Revaluation)
| Term |
System |
Direction |
Decided By |
Effect |
| Depreciation |
Flexible (floating) |
Rupee falls in value |
Market forces |
Exports cheaper; imports costlier |
| Devaluation |
Fixed |
Rupee falls in value |
Government / RBI |
Exports cheaper; imports costlier |
| Appreciation |
Flexible (floating) |
Rupee rises in value |
Market forces |
Exports costlier; imports cheaper |
| Revaluation |
Fixed |
Rupee rises in value |
Government / RBI |
Exports costlier; imports cheaper |
The key exam distinction: depreciation/appreciation are market-driven (flexible rate); devaluation/revaluation are policy-driven (fixed rate).
Purchasing Power Parity (PPP) Theory
The Purchasing Power Parity theory states that the exchange rate between two currencies should equal the ratio of the price levels in the two countries. It explains long-run exchange rate movements.
Exchange Rate (e) = P_domestic / P_foreign
If the price level in India rises faster than in the USA (India has higher inflation), the rupee should depreciate against the dollar to maintain PPP. This is the purchasing power parity condition.
Limitation: PPP holds only in the long run and only for tradeable goods. Non-tradeable goods (haircuts, rent) cause deviations from PPP.
Key Concepts at a Glance
Fixed vs Flexible Rate
Government-set vs Market-determined
Fixed: set by govt/central bank; requires forex reserves to maintain. Flexible: determined by market forces of demand and supply of foreign currency.
Depreciation vs Devaluation
Market-driven vs Policy-driven fall in value
Depreciation: market-driven fall in a currency's value (flexible rate). Devaluation: govt-decided reduction in currency value (fixed rate). Both make exports cheaper and imports costlier.
Demand for Forex
Imports, investment abroad, tourism, education
Imports, investment abroad, paying interest on external debt, tourism, foreign education. Demand curve slopes downward — cheaper forex leads to more imports.
PPP Theory
e = P_domestic / P_foreign
Exchange rate between two currencies should equal the ratio of price levels. Explains long-run exchange rate movements. Higher domestic inflation → currency depreciation.
Sample MCQs — Foreign Exchange Rate
1. Depreciation of the rupee means:
- RBI reduces the value of rupee
- Market forces reduce rupee's value
- Rupee becomes stronger
- India's imports become cheaper
Correct: B — Depreciation is a market-driven fall in a currency's value under the flexible exchange rate system. When RBI officially reduces the value, it is called devaluation.
2. Which of the following creates demand for foreign exchange?
- Exports of goods
- Foreign tourists visiting India
- Foreign direct investment into India
- Paying for imports
Correct: D — Paying for imports requires purchasing foreign currency, creating demand for forex. Exports, foreign tourism receipts, and FDI inflows all supply foreign exchange to India.
3. (Numerical) Exchange rate: 1 USD = ₹70. India imports goods worth $100. After the rupee depreciates to 1 USD = ₹80, what is the cost of the same import in rupees?
- ₹7,000
- ₹8,000
- ₹700
- ₹6,000
Correct: B — After depreciation: Cost = $100 × ₹80/$ = ₹8,000. Before depreciation it was ₹7,000. Depreciation makes imports costlier for domestic buyers.
Practice more questions on Foreign Exchange Rate →
Common Exam Mistakes to Avoid
- Using depreciation and devaluation interchangeably — they have opposite policy contexts (market vs government decision).
- Confusing demand for forex (outflows — imports, tourism abroad) with supply of forex (inflows — exports, FDI into India).
- Thinking a weaker rupee always hurts India — it helps exporters, though it hurts importers.
- Applying PPP to short-run exchange rate movements — PPP is a long-run theory and does not explain short-term fluctuations.