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NISM-Series-XV: Research Analyst · Economic Analysis

Balance of Payments, Exchange Rates and Trade for NISM Research Analyst

Updated 11 October 2026 · Fact-checked

The balance of payments (BoP) records all economic transactions between residents of a country and the rest of the world in a period. It has a current account (trade, services, income, transfers) and a capital account (investment and borrowing flows). Exchange rates move with demand and supply for the currency. Solve questions by tracing the flow.

Understand Balance of Payments, Exchange Rates and Trade

The balance of payments is a record of every transaction between a country's residents and the rest of the world over a period. Think of it as the country's cash book with other countries. Money coming in is a credit. Money going out is a debit.

The current account covers trade in goods (exports and imports), trade in services (such as IT exports), primary income (such as interest and dividends earned or paid abroad) and secondary income (such as remittances sent home by workers abroad). The difference between exports and imports of goods is the trade balance. A current account deficit (CAD) means the country pays out more to the world on these items than it earns. India usually runs a trade deficit in goods, partly offset by a surplus in services and remittances.

The capital account (in the broader sense used in analysis, also called the capital and financial account) records flows of investment and borrowing: foreign direct investment (FDI), foreign portfolio investment (FPI), external commercial borrowings, banking capital and changes in foreign exchange reserves. A current account deficit has to be financed by net capital inflows or by drawing down reserves. In theory the overall BoP balances, because the deficit on one side is matched by the other.

The exchange rate is the price of one currency in terms of another, for example ₹ per US dollar. Under a floating system it is set by demand and supply. Demand for dollars comes from imports, overseas payments and foreign investors selling Indian assets. Supply of dollars comes from exports, remittances and foreign investment inflows. The RBI may buy or sell dollars to smooth sharp moves.

Key drivers of the rupee: the current account position, capital flows, interest rate differentials, inflation differentials, crude oil prices, RBI intervention and global risk sentiment. Depreciation means the rupee weakens (more ₹ per dollar). Appreciation means it strengthens. A weaker rupee helps exporters and hurts importers and companies with foreign currency debt. It also raises imported inflation. For stock markets, FPI flows link both: heavy FPI selling weakens the rupee and pressures equities.

Key formulas to remember

Balance of payments identity
Current account + Capital account (incl. reserves change) = 0
A current account deficit is financed by net capital inflows or by a fall in reserves.
Trade balance
Trade balance = Exports of goods − Imports of goods
Negative means trade deficit. It is only one part of the current account.
Current account
CA = Trade balance (goods) + Net services + Net primary income + Net secondary income
Remittances sit in secondary income.
Exchange rate quote
Exchange rate = ₹ per 1 unit of foreign currency
A rise in the number means the rupee has depreciated.
Percentage change in the rupee
Depreciation of ₹ (%) = (New rate − Old rate) ÷ Old rate × 100, when quoted as ₹ per $
Use the same quote on both dates.
Interest rate parity (idea)
Forward premium ≈ Domestic interest rate − Foreign interest rate
A currency with higher interest rates trades at a forward discount, approximately.

How to solve Balance of Payments, Exchange Rates and Trade questions

Use this method for any question on BoP, exchange rates or trade.

  1. 1Identify what is asked: an account classification, a direction of currency movement, or an impact on a sector.
  2. 2For classification, ask whether the item is a trade, income or transfer flow (current account) or an investment or borrowing flow (capital account).
  3. 3For currency questions, decide whether the event raises demand for dollars (rupee weaker) or supply of dollars (rupee stronger).
  4. 4Check the quote. ₹ per $ rising means rupee depreciation.
  5. 5For impact questions, split winners and losers: exporters gain from depreciation; importers and foreign-currency borrowers lose.
  6. 6If numbers are given, compute the percentage change using the formula with the old rate as base.
  7. 7Eliminate options with absolute words such as always or only, then pick the best fit.

Quickest way: Dollar demand versus dollar supply test

When to use it: Use for any direction-of-rupee or impact question in the exam.

  1. Ask: does this event make people need more dollars or bring in more dollars?
  2. More dollars needed (imports, FPI outflow, higher crude) means rupee weakens.
  3. More dollars coming in (exports, FDI, FPI inflow, remittances) means rupee strengthens.
  4. Then apply who gains: weak rupee helps exporters like IT and pharma; hurts oil importers and those with dollar debt.

Common mistakes in Balance of Payments, Exchange Rates and Trade

  • Treating the trade deficit and the current account deficit as the same.

    Both are in news together and both mention imports and exports.

    Fix: Trade balance covers goods only. Current account adds services, income and transfers.

  • Putting FDI or FPI in the current account.

    Students link any foreign money to trade.

    Fix: Investment and borrowing flows belong to the capital (financial) account. Dividends and interest paid are current account income.

  • Reading a rise in ₹ per $ as rupee appreciation.

    A higher number feels like a stronger currency.

    Fix: More rupees needed per dollar means the rupee is weaker.

  • Saying a weaker rupee is good for every company.

    Students remember the exporter benefit only.

    Fix: Importers, oil marketing companies and firms with foreign currency debt are hurt. Exporters with high import content gain less.

  • Assuming a current account deficit always means a crisis.

    Deficit sounds like a negative.

    Fix: It is manageable when financed by stable inflows such as FDI. Risk rises when it depends on volatile short-term flows or is large relative to GDP.

Worked examples

Example 1

The rupee moves from ₹80 per US dollar to ₹84 per US dollar. Calculate the percentage change in the rupee's value in terms of the dollar quote and state the direction.

Show the solution
  1. Old rate = 80, new rate = 84.
  2. Change = 84 − 80 = 4.
  3. Percentage change = 4 ÷ 80 × 100 = 5%.
  4. More rupees are needed per dollar, so the rupee has depreciated.

Answer: The rupee has depreciated; the ₹ per $ rate rose by 5%.

Example 2

Which one of the following is recorded in the current account of India's balance of payments? (a) Foreign direct investment into an Indian company (b) Remittances sent by an Indian working in the Gulf to his family (c) External commercial borrowing by an Indian firm (d) FPI purchase of Indian shares

Show the solution
  1. Classify each option by flow type.
  2. FDI, ECB and FPI purchases are investment or borrowing flows, so they are capital account items.
  3. Remittances are transfers with no investment claim, so they are secondary income in the current account.

Answer: (b) Remittances are a current account item.

Exam tips

  • Expect direct classification questions: current account or capital account. Memorise the items in each.
  • Read the exchange rate quote carefully before deciding appreciation or depreciation.
  • For impact questions, look for the sector: exporters gain from a weak rupee; oil importers lose.
  • Be wary of options that say a deficit is always harmful or a weak currency is always beneficial.
  • Link capital flows to markets: strong FPI outflows tend to weaken the rupee and pressure equity prices.

Practice questions from Economic Analysis

Balance of Payments, Exchange Rates and Trade in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Balance of Payments, Exchange Rates and Trade: frequently asked questions

What is the difference between the current account and the capital account?

The current account records trade in goods and services, income and transfers. The capital account records investment and borrowing flows such as FDI, FPI and loans. A current account deficit is financed by capital inflows or reserves.

What does a current account deficit mean for India?

It means India pays out more foreign exchange on current items than it earns. It needs net capital inflows to fund the gap. A large deficit funded by short-term flows can pressure the rupee.

How do exchange rates affect the stock market?

A weaker rupee can lift earnings of exporters but hurt importers and firms with dollar debt. Currency weakness often goes with FPI outflows, which can lower share prices. Imported inflation may also affect interest rates.

What factors affect the rupee exchange rate?

Main factors are the current account, capital flows, interest rate and inflation differentials, crude oil prices, RBI intervention and global risk sentiment. Each works by changing demand or supply of dollars.