Under flexible exchange rate system, the exchange rate is determined

1. Basics of Foreign Exchange Market (basic)

The Foreign Exchange (Forex) Market is the global arena where currencies are bought and sold. It is not a single building or a centralized location; rather, it is a worldwide network of participants—including commercial banks, foreign exchange brokers, and monetary authorities—who are in constant contact with one another Macroeconomics (NCERT class XII 2025 ed.), Open Economy Macroeconomics, p.91. At its most basic level, money acts as a medium of exchange to facilitate these transactions, moving beyond simple barter systems to allow for international trade and investment Macroeconomics (NCERT class XII 2025 ed.), Money and Banking, p.36.

In a flexible or floating exchange rate system, the value of a currency is determined by the market forces of demand and supply. Just like the price of any commodity, the exchange rate is found where the demand curve for a currency intersects with its supply curve Macroeconomics (NCERT class XII 2025 ed.), Open Economy Macroeconomics, p.92. If more people want to buy Indian Rupees (demand increases), the value of the Rupee goes up; if more people want to sell it (supply increases), the value goes down. While a 'free float' allows the market to operate without any government interference, most countries today use a Managed Float, where the Central Bank (like the RBI) intervenes only to prevent extreme volatility and maintain order Indian Economy, Nitin Singhania (ed 2nd 2021-22), India’s Foreign Exchange and Foreign Trade, p.493.

India’s journey in this market has seen a significant shift from strict "control" to "management," as highlighted below:

Feature	FERA (1973)	FEMA (1999)
Approach	Regulated demand due to limited supply (Control).	Facilitated trade and increased reserves (Management).
Context	Closed economy, strict statutory powers.	Post-1991 liberalization and foreign investment.

Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.67

Sources: Macroeconomics (NCERT class XII 2025 ed.), Open Economy Macroeconomics, p.91-92; Macroeconomics (NCERT class XII 2025 ed.), Money and Banking, p.36; Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.67; Indian Economy, Nitin Singhania (ed 2nd 2021-22), India’s Foreign Exchange and Foreign Trade, p.493

2. Determinants of Demand and Supply for Foreign Exchange (basic)

To understand how the value of a currency is determined in a global market, we must first look at why people want foreign currency (demand) and how it enters our economy (supply). In a flexible exchange rate system, the 'price' of a currency is not set by a decree but by the interaction of these two forces Macroeconomics (NCERT class XII 2025 ed.), Chapter 6, p.92. Think of foreign exchange like any other commodity: when more people want it, its price goes up; when it is abundant, its price tends to fall.

The Demand for Foreign Exchange arises from our need to interact with the rest of the world. We demand foreign currency when we want to purchase goods and services from abroad (imports), send gifts or remittances to relatives living in other countries, or purchase financial assets like stocks or real estate in a foreign nation Macroeconomics (NCERT class XII 2025 ed.), Chapter 6, p.91. Crucially, there is an inverse relationship between the exchange rate and demand. If the price of a US Dollar rises (say, from ₹80 to ₹85), foreign goods become more expensive for Indians. Consequently, we import less, and our demand for Dollars decreases.

The Supply of Foreign Exchange, on the other hand, flows into the home country when foreigners buy our goods and services (exports), send transfers/gifts to India, or invest in Indian assets Macroeconomics (NCERT class XII 2025 ed.), Chapter 6, p.91. Here, we see a direct relationship: if the price of foreign exchange rises, Indian goods become 'cheaper' for foreigners in their own currency terms. For instance, if the Dollar strengthens, an American can buy more Indian tea for the same amount of USD. This boosts our exports and increases the supply of foreign currency entering our markets.

In India, the management of these forces has evolved significantly. We moved from the restrictive Foreign Exchange Regulation Act (FERA), 1973, which treated foreign exchange as a scarce controlled commodity, to the more liberal Foreign Exchange Management Act (FEMA), 1999, which focuses on managing and facilitating trade and payments Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.67.

Force	Primary Drivers	Relationship with Exchange Rate
Demand	Imports, Sending Gifts Abroad, Buying Foreign Assets	Inverse: Price ↑ Demand ↓
Supply	Exports, Receiving Gifts, Foreign Investment in India	Direct: Price ↑ Supply ↑

Sources: Macroeconomics (NCERT class XII 2025 ed.), Chapter 6: Open Economy Macroeconomics, p.91-92; Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.67

3. The Fixed Exchange Rate System (Pegged System) (intermediate)

In a Fixed Exchange Rate System (also known as a Pegged System), the value of a national currency is not left to the whims of the market. Instead, the Government or Central Bank officially fixes the exchange rate at a specific level against another currency (like the US Dollar) or a precious metal (like gold). The primary goal of this system is to ensure stability in international trade and capital flows by removing the uncertainty of price fluctuations. As noted in India and the Contemporary World – II. History-Class X, Chapter 3, p.77, governments actively intervene in the foreign exchange market to prevent movements in these rates.

Historically, the most famous example was the Bretton Woods System (1947–1971). Under this arrangement, the US Dollar was anchored to gold at a fixed price ($35 per ounce), and other currencies, including the Indian Rupee, were pegged to the dollar. As a founding member of the IMF, India followed this "Par Value System," maintaining its rate within a narrow margin of ±1 percent Indian Economy, Nitin Singhania (ed 2nd 2021-22), Chapter 17, p.496. However, maintaining such a system requires the Central Bank to hold massive foreign exchange reserves. If the market demand for a foreign currency rises, the Central Bank must sell its own reserves to satisfy that demand and keep the exchange rate from rising.

Governments may also use fixed rates as a tool for economic policy. For instance, if a country wants to encourage exports, it might deliberately set a higher exchange rate (e.g., moving from ₹50/$1 to ₹70/$1). This makes the domestic currency "cheaper" for foreigners, though it creates a situation where the supply of foreign currency exceeds the demand at that artificial price Macroeconomics (NCERT class XII 2025 ed.), Chapter 6, p.94. While this system provided decades of post-war growth, it ultimately collapsed in the early 1970s when the US could no longer maintain the dollar's value in relation to gold, leading to the modern era of floating rates India and the Contemporary World – II. History-Class X, Chapter 3, p.77.

Feature	Fixed Exchange Rate	Flexible (Floating) Rate
Determination	Set by Government/Central Bank	Market forces (Demand & Supply)
Intervention	Frequent (to maintain the peg)	Minimal to None
Policy Goal	Stability and Predictability	Automatic adjustment to shocks

Sources: India and the Contemporary World – II. History-Class X, Chapter 3: The Making of a Global World, p.75, 77; Indian Economy, Nitin Singhania (ed 2nd 2021-22), Chapter 17: India’s Foreign Exchange and Foreign Trade, p.496; Macroeconomics (NCERT class XII 2025 ed.), Chapter 6: Open Economy Macroeconomics, p.94

4. Balance of Payments (BoP) Framework (intermediate)

Think of the Balance of Payments (BoP) as a nation's comprehensive economic diary. It is a systematic record of all economic transactions between the residents of a country and the rest of the world over a specific period, usually a year. In India, this is compiled on an accrual basis using a vertical double-entry bookkeeping system, meaning every credit (money coming in) has a corresponding debit (money going out) Indian Economy, Nitin Singhania, Chapter 17, p.487.

To understand how this framework functions, we must look at its two primary pillars, though modern standards now refine these further:

• The Current Account: This records the trade in "real" things—goods (Balance of Trade), services (like IT or tourism), and transfer payments (like gifts or remittances). When a country spends more on imports than it earns from exports, it runs a Current Account Deficit (CAD), signifying that the nation is a net borrower from the rest of the world Macroeconomics (NCERT Class XII), Chapter 6, p.87.
• The Capital and Financial Account: This records the "claims" or assets. It includes Foreign Direct Investment (FDI), loans, and banking capital. Under the new BPM6 standards adopted by the RBI, transactions in financial assets like bonds and equities are specifically categorized under the Financial Account Macroeconomics (NCERT Class XII), Chapter 6, p.90.

Crucially, the BoP must always "balance" in an accounting sense. If a country has a deficit in its Current Account, it must be financed by a surplus in the Capital/Financial Account (by attracting investment or borrowing) or by dipping into its Official Foreign Exchange Reserves. If there is still a mismatch due to recording difficulties, it is captured under Errors and Omissions Macroeconomics (NCERT Class XII), Chapter 6, p.89.

Component	Nature of Transaction	Key Examples
Current Account	Income and consumption (Flow)	Exports/Imports of goods, Software services, Remittances.
Capital Account	Assets and Liabilities (Stock)	External Commercial Borrowings (ECB), Foreign Investment (FDI/FII).

Sources: Indian Economy, Nitin Singhania, Chapter 17: India’s Foreign Exchange and Foreign Trade, p.487; Macroeconomics (NCERT Class XII 2025 ed.), Chapter 6: Open Economy Macroeconomics, p.87, 89-90

5. Foreign Exchange Reserves and RBI's Market Role (intermediate)

At its heart, a Foreign Exchange Reserve is a national piggy bank held in foreign currencies. While a truly flexible exchange rate system allows market forces of demand and supply to dictate the value of the Rupee, India follows a 'Managed Float' system. This means the Reserve Bank of India (RBI) doesn't set a fixed price for the Rupee, but it does step in to prevent 'wild swings' or excessive volatility that could hurt our economy Nitin Singhania, India’s Foreign Exchange and Foreign Trade, p.493. These reserves are not just piles of cash; they are a strategic portfolio including Foreign Currency Assets (FCA), Gold, and Special Drawing Rights (SDRs), managed by the RBI under the legal mandate of the RBI Act 1934 Vivek Singh, Money and Banking- Part I, p.68. When the Rupee appreciates too fast because of a sudden flood of Dollars, the RBI acts as a 'buyer of last resort' to soak up the excess Dollars. However, there is a catch: when the RBI buys Dollars, it pays for them by releasing new Indian Rupees into the banking system. This extra cash can cause inflation. To prevent this, the RBI performs Sterilization — a process where it mops up that extra Rupee liquidity by selling Government Securities (G-Secs) back to the market Nitin Singhania, India’s Foreign Exchange and Foreign Trade, p.498. This two-step dance allows the RBI to stabilize the exchange rate without overheating the domestic economy. But how much reserve is 'enough'? Traditionally, we used the Import Cover rule (how many months of imports can these reserves pay for?). However, in today's globalized world, the Guidotti-Greenspan Rule is often preferred. This rule suggests that reserves should be enough to cover all short-term external debt maturing within one year, ensuring the country can survive even if foreign lenders suddenly stop providing credit Nitin Singhania, India’s Foreign Exchange and Foreign Trade, p.497.

Concept	Mechanism	Goal
Managed Float	RBI intervenes during extreme volatility	Currency Stability
Sterilization	Selling G-Secs to absorb excess Rupees	Inflation Control
Guidotti-Greenspan	Ratio of reserves to short-term debt	Reserve Adequacy

Sources: Nitin Singhania, Indian Economy, India’s Foreign Exchange and Foreign Trade, p.493, 497, 498; Vivek Singh, Indian Economy, Money and Banking- Part I, p.68

6. Currency Convertibility: Current and Capital Account (exam-level)

Currency Convertibility refers to the freedom with which a country's national currency can be converted into a foreign currency (and vice versa) at market-determined exchange rates. Think of it as the "openness" of a door: a fully convertible currency allows money to flow across borders without government hurdles, while a non-convertible currency keeps the door bolted shut. In India, this journey towards openness began in earnest with the 1991 economic reforms. Vivek Singh, Indian Economy [1947 – 2014], p.216

To understand how this works, we must look at the two components of the Balance of Payments (BoP):

• Current Account Convertibility: This allows for the free conversion of currency for transactions involving goods, services, and transfers (like remittances). India adopted full current account convertibility in 1994 as part of its commitment to the IMF. Vivek Singh, International Organizations, p.399. This means if an Indian firm wants to import machinery worth $10 million, the RBI allows the conversion of Rupees into Dollars without administrative restrictions. Vivek Singh, Money and Banking- Part I, p.109. However, "full" doesn't mean "unregulated"; certain limits exist for specific activities, such as a $10,000 cap for tourists or a $1 lakh limit for medical treatment without prior RBI approval. Nitin Singhania, India’s Foreign Exchange and Foreign Trade, p.499.
• Capital Account Convertibility (CAC): This involves the conversion of currency for changing ownership of assets and liabilities, such as foreign investment (FDI/FPI) or loans. India currently maintains partial capital account convertibility. Vivek Singh, Indian Economy [1947 – 2014], p.216. The government and RBI impose ceilings on how much foreign debt (External Commercial Borrowings) companies can raise or how much foreign investors can put into Government Securities. Vivek Singh, Money and Banking- Part I, p.109.

Feature	Current Account	Capital Account
Nature of Transaction	Trading goods, services, income, and transfers.	Investment in assets, stocks, and debt/loans.
Status in India	Full (with minor procedural limits).	Partial (regulated by RBI/Govt).
Adopted/Regulated since	1994 (per IMF SDDS standards).	Gradually liberalizing over time.

The cautious approach toward Capital Account Convertibility is designed to protect the economy from "capital flight"—where investors suddenly pull huge sums of money out of the country, potentially crashing the exchange rate and the domestic financial system.

Sources: Indian Economy, Vivek Singh (7th ed. 2023-24), International Organizations, p.399; Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.109; Indian Economy, Nitin Singhania (2nd ed. 2021-22), India’s Foreign Exchange and Foreign Trade, p.499; Indian Economy, Vivek Singh (7th ed. 2023-24), Indian Economy [1947 – 2014], p.216

7. Managed Floating and Dirty Floating Systems (exam-level)

In the real world of global finance, exchange rates rarely exist in the extremes of being "perfectly fixed" or "purely flexible." Instead, most modern economies, including India, adopt a middle-ground approach known as the Managed Floating System. This is a hybrid regime where the exchange rate is primarily determined by the market forces of demand and supply, but the Central Bank (like the RBI) intervenes when necessary to maintain stability Indian Economy, Nitin Singhania, Chapter 17, p.493.

Under a Free Float system, the government keeps its "hands off" the steering wheel, allowing the currency to fluctuate entirely based on market sentiment. However, in a Managed Float, the Central Bank acts as a stabilizer. If the domestic currency becomes too volatile—meaning it is either appreciating (strengthening) or depreciating (weakening) too rapidly—the Central Bank steps into the foreign exchange market to buy or sell foreign currencies Indian Economy, Vivek Singh, Money and Banking- Part I, p.41. This intervention is designed to ensure that exchange rate movements happen in an orderly manner rather than through chaotic spikes that could hurt trade or cause inflation.

The term "Dirty Floating" is often used interchangeably with managed floating, though it sometimes carries a slightly negative connotation. It suggests that the exchange rate is not "cleanly" market-determined because the government is manipulating the rate to gain a competitive advantage (for example, keeping a currency artificially weak to boost exports). Despite the name, it is a standard practice globally to prevent economic shocks Macroeconomics (NCERT class XII 2025 ed.), Chapter 6, p.95.

Feature	Free Float	Managed Float (Dirty Float)
Primary Driver	Market Forces (Demand/Supply)	Market Forces + Central Bank
CB Intervention	Zero / Negligible	Frequent (to curb volatility)
Objective	Pure market equilibrium	Stability and orderly movement

Sources: Indian Economy, Nitin Singhania, Chapter 17, p.493; Indian Economy, Vivek Singh, Money and Banking- Part I, p.41; Macroeconomics (NCERT class XII 2025 ed.), Chapter 6, p.95

8. Measuring Currency Value: NEER and REER (exam-level)

To understand a currency's true strength, looking at a single exchange rate (like ₹/$ ) isn't enough because we trade with many countries. Instead, we use indices. The Nominal Effective Exchange Rate (NEER) is a weighted average of the Rupee against a basket of currencies of India's major trading partners. The weights are determined by the volume of trade we do with each country. If the NEER index increases, it indicates that the Rupee is appreciating against the basket; if it decreases, the Rupee is depreciating Indian Economy, Vivek Singh, Fundamentals of Macro Economy, p.27.

However, NEER doesn't tell the whole story because it ignores inflation. If prices in India are rising faster than prices in the US or Europe, our exports become more expensive even if the exchange rate stays the same. This is where the Real Effective Exchange Rate (REER) comes in. REER is the NEER adjusted for the inflation differential between India and its trading partners Indian Economy, Nitin Singhania, India’s Foreign Exchange and Foreign Trade, p.496. It is the definitive parameter for measuring a country's export competitiveness.

A crucial point for the exam is the interpretation of these movements:

• An increase in REER means the currency is appreciating in real terms. This actually leads to a decline in trade competitiveness because our goods become more expensive for the world.
• Divergence: If domestic inflation is consistently higher than international inflation, the REER will rise faster than the NEER, creating a widening gap between the two Indian Economy, Vivek Singh, Fundamentals of Macro Economy, p.35.

Feature	NEER	REER
Inflation Adjustment	Not adjusted for price changes.	Adjusted for inflation differentials.
Utility	Measures nominal currency value against a basket.	Measures actual trade competitiveness.
Impact of High Inflation	Remains unaffected by domestic price rise.	Increases (appreciates), making exports costlier.

Sources: Indian Economy, Vivek Singh, Fundamentals of Macro Economy, p.27; Indian Economy, Nitin Singhania, India’s Foreign Exchange and Foreign Trade, p.496; Indian Economy, Vivek Singh, Fundamentals of Macro Economy, p.35

9. Solving the Original PYQ (exam-level)

Now that you have mastered the building blocks of demand and supply curves, this question invites you to apply those microeconomic principles to the global stage. In a flexible exchange rate system, a currency is treated much like any other commodity in a free market. The "price" of the currency—the exchange rate—is not an arbitrary number but the equilibrium point where the global demand for a currency meets its supply. As explained in Macroeconomics (NCERT class XII 2025 ed.), the defining feature of this regime is that it functions without a predetermined target set by authorities, making the predominantly by mechanism market the only logical driver of value.

To arrive at (A), you must distinguish between market-led discovery and institutional intervention. In your studies, you encountered 'managed floating,' a nuance where the Central Bank might step in to curb extreme volatility; however, as noted in Indian Economy, Nitin Singhania, the underlying framework remains market-determined. Option (B) is a classic trap, as it describes a fixed exchange rate system, the polar opposite of a flexible one. Similarly, Option (C) refers to a weighted index (like the Trade Weighted Index), which is a statistical tool used to measure a currency's strength against a basket of peers, not a method for setting the daily exchange rate itself.

Finally, UPSC often uses Option (D) to test your knowledge of institutional mandates. While the World Trade Organization (WTO) governs the rules of international trade, it has no authority over currency valuation or exchange rate regimes. By process of elimination and a clear understanding of market forces, you can see that predominantly by mechanism market is the only choice that reflects the "flexible" nature of the system, where the "invisible hand" of the foreign exchange market takes precedence over government decree.