Balance of payments and exchange rates

In short

The balance of payments (BoP) is the double-entry record of all economic transactions between residents of a country and the rest of the world over a period, usually a year or a quarter. The exchange rate is the price of one currency in terms of another, and it is the single price that clears the supply of and demand for foreign exchange generated by those BoP transactions. The two are inseparable: a current account deficit must be financed by capital inflows or by running down reserves, and the exchange rate (or the central bank's intervention) does the adjusting. In India this is compiled by the RBI under the IMF's BPM6 framework, governed by FEMA, 1999, and is standard examination material for BA/MA economics, UGC-NET, Indian Economic Service, RBI Grade B, SEBI and NABARD papers, and for interviews in treasury, research and trade-finance roles.

Explained

Structure of the balance of payments (BPM6)

• Current account — transactions in goods, services, income and transfers; it measures a country's net earning position with the world.
  • *Merchandise (visible) trade*: exports minus imports of goods, recorded f.o.b. on both sides in the BoP.
  • *Services (invisibles)*: software and IT, travel, transport, insurance, financial, business and professional services — India's structural surplus item.
  • *Primary income*: compensation of employees and investment income (interest, dividends, profits) — a persistent deficit for India because it is a net debtor.
  • *Secondary income (current transfers)*: private remittances from Indians abroad, grants — a large, stable surplus; India has been the world's largest recipient of remittances for several years.
• Capital account (BPM6 sense) — capital transfers and acquisition/disposal of non-produced, non-financial assets (debt forgiveness, investment grants, sale of trademarks and brand names, natural resources, leases and licences). A very small item. Note that BPM6 dropped "migrants' transfers" as a category, and treats outright sales of patents/R&D as services in the current account, not capital account items.
• Financial account — direct investment (FDI), portfolio investment (FPI in equity and debt), other investment (loans, ECBs, trade credit, NRI deposits, banking capital) and reserve assets.
• Errors and omissions — the balancing residual arising from incomplete and mismatched source data.
• Accounting identity: the BoP as a whole always balances because it is double entry; a "BoP deficit" means a deficit on the autonomous (above-the-line) items, financed by accommodating items — chiefly reserve movements and official borrowing.
• Credits (+) = transactions that earn foreign exchange (exports, remittances received, inflows of capital). Debits (−) = those that use it (imports, income paid abroad, Indian investment abroad).
• Note a sign trap in BPM6: an increase in reserve assets is a debit (an acquisition of a foreign asset). India's published tables usually show it as "increase (−)/decrease (+) in reserves".

BoP disequilibrium and its correction

• Types: *cyclical* (follows the trade cycle), *structural* (shifts in technology, tastes, resource endowment), *secular/long-run* (stage of development), *monetary* (excess money supply spilling into imports).
• Causes: import-intensive growth, oil price shocks, loss of export competitiveness, high domestic inflation, debt-service burden, sudden stop in capital flows.
• Three analytical approaches examined:
  1. Elasticity (traditional/Marshall–Lerner) approach — devaluation works only if demand elasticities are large enough; it is a *relative-price* story.
  2. Absorption approach (Alexander) — B = Y − A; a deficit means absorption (C+I+G) exceeds output, so correction needs expenditure *reduction* as well as expenditure *switching*.
  3. Monetary approach (Johnson, Mundell) — a deficit is an excess supply of money relative to demand; it is self-correcting as reserves drain and money supply falls.
• Policy measures: *expenditure-reducing* (tighter fiscal and monetary policy), *expenditure-switching* (devaluation/depreciation, tariffs, quotas, export incentives), and *financing* (reserves, IMF drawings, ECBs, NRI bonds — India used Resurgent India Bonds in 1998 and FCNR(B) swaps in 2013).

Exchange rates: concepts and quotation

• Nominal exchange rate — the market price of one currency in another. Direct (home) quote in India: ₹ per 1 US dollar. Indirect quote: dollars per rupee.
• Depreciation/appreciation — a fall/rise in a currency's value under a floating regime. Devaluation/revaluation — a deliberate official reduction/increase of the parity under a fixed or pegged regime (India devalued in 1949, 1966 and 1991).
• Bid–ask spread: the dealer buys at the bid and sells at the ask; the spread is the dealer's margin.
• Spot, forward and swap: spot settles in T+2 (the Indian market also quotes *cash*, settling the same day, and *tom*, settling T+1); a forward fixes a rate today for future delivery; a swap is a simultaneous spot purchase and forward sale.
• Forward premium/discount: a currency trades at a forward premium when its forward price is above spot; for USD/INR the dollar normally trades at a premium because Indian interest rates exceed US rates.
• Cross rate: a rate between two currencies derived through a third (usually the dollar).
• Arbitrage, hedging, speculation: arbitrage removes inconsistent quotes (two-point and three-point/triangular arbitrage); hedging removes exposure; speculation takes it on deliberately.
• Real exchange rate adjusts the nominal rate for relative price levels; NEER is a trade-weighted index of nominal rates and REER the same index deflated by relative prices. The RBI publishes 40-currency and 6-currency NEER/REER indices (base currently 2015-16 = 100); a REER above 100 indicates real appreciation, i.e. lost price competitiveness.

Theories of exchange rate determination

• Demand and supply (flow) approach — the rate is set where demand for foreign exchange (imports, outward investment, remittances out) equals supply (exports, inward investment, remittances in).
• Mint parity / gold standard — rates fixed by gold content, fluctuating only between the gold export and import points; collapsed in the 1930s.
• Purchasing power parity (Cassel) — *absolute* PPP: the rate equals the ratio of price levels (law of one price for a basket); *relative* PPP: the percentage change in the rate equals the inflation differential. Empirically weak in the short run (non-traded goods, transport costs, tariffs, quality differences) but a reasonable long-run anchor; the Balassa–Samuelson effect explains why poorer countries' currencies are undervalued on PPP, which is why India's PPP GDP far exceeds its market-rate GDP.
• Interest rate parity — *covered* (CIP): the forward premium equals the interest differential, enforced by arbitrage; *uncovered* (UIP): the expected depreciation equals the interest differential, which also underlies the Fisher open relation. Deviations in India reflect capital controls and transaction costs.
• Monetary approach — relative money supplies and incomes drive the rate; Dornbusch overshooting explains why the rate moves more than its long-run value in the short run because goods prices are sticky and only the asset market clears instantly.
• Portfolio-balance / asset-market approach — the rate is an asset price set by the demand for domestic versus foreign bonds and equities; explains the dominance of capital flows and news over trade flows in day-to-day movements.

Exchange rate regimes, and India's path

• Spectrum: hard peg (dollarisation, currency board) → conventional peg → basket peg → crawling peg/band → managed float ("dirty float") → free float.
• Fixed-rate merits: certainty for trade and investment, an anti-inflation anchor, no speculative churn. Demerits: reserves and policy independence are sacrificed, crises come as sudden collapses.
• Floating merits: automatic adjustment, monetary policy autonomy, no need for large reserves. Demerits: volatility, imported inflation through pass-through, balance-sheet risk on unhedged foreign debt.
• Impossible trinity: a country can pick only two of free capital mobility, a fixed exchange rate, and independent monetary policy. India's compromise is a managed float with partial capital controls and a large reserve buffer.
• India's regime history: par value with sterling, then the US dollar; basket peg from 1975; the 1991 crisis (reserves down to roughly US$1 bn, about two weeks of imports; gold pledged abroad) brought a two-step devaluation of about 18–19% on 1 and 3 July 1991; LERMS (dual rate) in March 1992; a single market-determined rate from March 1993; current account convertibility with acceptance of IMF Article VIII obligations in August 1994. Capital account convertibility remains partial — the two Tarapore Committees (1997, 2006) laid out a phased road map that has been followed selectively.
• The RBI's stated position is that the rate is market-determined and it intervenes only to curb excessive volatility, not to target a level; the IMF's recent Article IV assessments have at times classified the de facto regime as a "stabilised arrangement" rather than floating — a classification the RBI contests.

India's institutional and legal framework

• FEMA, 1999 (in force 1 June 2000) replaced FERA, 1973: it changed the law from a criminal, prohibitory regime to a civil, management regime — all current account transactions are permitted unless restricted, all capital account transactions are prohibited unless permitted.
• Key subordinate rules: Foreign Exchange Management (Current Account Transactions) Rules, 2000; the Liberalised Remittance Scheme (LRS), under which a resident individual may remit up to US$250,000 per financial year for permitted purposes; FDI is governed by the consolidated FDI policy (DPIIT) and NDI Rules, 2019. TCS applies to LRS remittances above a threshold; the rate and threshold have been revised repeatedly, so verify the current schedule.
• Authorised Dealers (AD-I banks) run the market; FEDAI sets market practice and FBIL publishes the official USD/INR reference rate (since July 2018, replacing the RBI's own fixing). Currency futures and options on USD/INR, EUR/INR, GBP/INR and JPY/INR trade on NSE and BSE and at IFSC exchanges in GIFT City; an offshore NDF market exists in Singapore, Dubai and London.
• Foreign exchange reserves = foreign currency assets + gold + SDRs + reserve tranche position with the IMF. India's reserves have been in the region of US$690–700 bn during 2025, giving roughly 11 months of import cover; the exact weekly figure is in the RBI's Weekly Statistical Supplement and changes constantly.
• Rupee internationalisation: Special Rupee Vostro Accounts (SRVAs) permitted from July 2022 allow invoicing and settlement of trade in rupees; the rupee has also been opened to certain cross-border UPI and local-currency settlement arrangements.

Key points

• Balance of payments – systematic double-entry record of a resident's transactions with non-residents over a period; always balances in accounting terms.
• Current account – goods + services + primary income + secondary income; equals the gap between national saving and investment.
• Capital vs financial account – under BPM6 the capital account is small (capital transfers, patents); FDI, FPI, loans and reserves sit in the financial account.
• BoP deficit – a deficit on autonomous items, financed by accommodating items (reserves, official borrowing).
• Errors and omissions – the statistical residual that forces the accounts to add to zero.
• India's pattern – merchandise deficit, offset by a large services surplus and remittances, with a negative primary income balance.
• Invisibles – services + income + transfers; India's invisibles surplus keeps the CAD modest despite a huge trade gap.
• Nominal vs real exchange rate – the real rate corrects for relative inflation and measures true competitiveness.
• NEER / REER – trade-weighted indices published by the RBI (40- and 6-currency, base 2015-16 = 100); REER > 100 means real appreciation.
• Devaluation vs depreciation – policy act under a peg versus market outcome under a float.
• PPP – the rate moves to equalise price levels in the long run; weak in the short run.
• Covered interest parity – forward premium = interest differential; it is an arbitrage condition, not a theory.
• Marshall–Lerner condition – devaluation improves the trade balance only if ηx + ηm > 1 (from balanced trade).
• J-curve – the balance worsens first (contracted volumes, costlier imports) and improves later as quantities respond.
• Impossible trinity – fixed rate, free capital mobility and monetary autonomy cannot coexist.
• Convertibility – India: current account convertible since August 1994; capital account only partially.
• FEMA, 1999 – civil law replacing FERA, 1973; current transactions free unless restricted, capital transactions restricted unless permitted.
• Import cover – reserves divided by average monthly imports; a standard adequacy test alongside reserves/short-term debt.

Formulas and examples

Example 1 — Building a BoP statement (illustrative US$ bn, orders of magnitude of a recent Indian year):

• Invisibles balance = 189 − 38 + 109 = +260, which absorbs 92% of the merchandise deficit of 283.
• If GDP is US$3,900 bn, CAD = 23/3,900 = 0.6% of GDP — comfortably inside the 2.5–3% level usually treated as the warning zone.
• Reserves rise by 28, so the "BoP surplus" is 28 even though the current account is in deficit.

Example 2 — Cross rate and triangular check: spot ₹/USD = 88.50 and USD/EUR = 1.0850.

• ₹/EUR = 88.50 × 1.0850 = ₹96.02 per euro.
• If a bank quotes ₹95.50/EUR, buy euros from it at 95.50, sell at 96.02 → arbitrage profit of ₹0.52 per euro before costs; such gaps close in seconds.

Example 3 — Relative PPP: spot ₹88.00/USD; expected inflation 5.0% in India, 2.0% in the US over one year.

• Exact: e₁ = 88.00 × (1.05/1.02) = 88.00 × 1.029412 = ₹90.59/USD.
• Approximation: 88.00 × (1 + 0.03) = ₹90.64 — the 5 paise gap shows why the exact form is preferred when differentials are large.
• Interpretation: the rupee is expected to depreciate about 2.94%; if it actually depreciates only 1%, the real exchange rate appreciates and exports lose competitiveness.

Example 4 — Forward premium and covered interest parity: spot ₹88.00/USD, 3-month forward ₹89.10, US 3-month rate 4.50% p.a.

• Annualised forward premium = (89.10 − 88.00)/88.00 × (12/3) × 100 = 0.0125 × 400 = 5.00% p.a. (dollar at a premium).
• CIP-implied 3-month rupee rate: (1 + i_INR/4) = (F/S) × (1 + 0.045/4) = 1.0125 × 1.01125 = 1.023889 → i_INR/4 = 2.3889% → i_INR ≈ 9.56% p.a.
• If actual rupee 3-month funds cost 8.00%, a covered arbitrage exists: borrow rupees at 8%, convert, invest in dollars at 4.5%, sell dollars forward — net gain of roughly 1.5% p.a. before costs, until the forward premium falls.

Example 5 — Depreciation and the Marshall–Lerner condition: exports ₹40 lakh crore, imports ₹60 lakh crore, trade deficit ₹20 lakh crore. The rupee depreciates 10%. Assume export prices are set in rupees and import prices in foreign currency.

• Case A: ηx + ηm = 1.3 > 1 yet the deficit falls only ₹0.5 lakh crore, because trade was unbalanced to start with — the strict Marshall–Lerner condition assumes initially balanced trade.
• Case B: elasticities of 2.5 in total cut the deficit by ₹6.6 lakh crore. In the first two or three quarters, contracted volumes mean imports cost more in rupees while export quantities have not yet risen — the J-curve dip.

Example 6 — REER and competitiveness: NEER falls 4% (nominal depreciation), Indian WPI inflation 6%, trade-weighted partner inflation 2%.

• REER change ≈ −4% + (6% − 2%) = 0%. The nominal depreciation exactly offsets the inflation differential, so there is no gain in price competitiveness — the standard reason a falling rupee need not help exports.

Example 7 — Import cover: reserves US$690 bn, annual merchandise imports US$720 bn.

• Monthly imports = 720/12 = US$60 bn → import cover = 690/60 = 11.5 months, far above the traditional 3-month norm.

Where it is used

• Bank and corporate treasuries (SBI, HDFC Bank, ICICI, Axis, Kotak, and the treasuries of Reliance, Tata, Infosys): dealers and treasury analysts quote spot and forwards, run CIP arbitrage, and hedge client exposures with forwards, swaps and options.
• Exporters and importers — textiles in Tiruppur, gems and jewellery in Surat, pharma, engineering goods, IT services: forward cover decisions, invoicing currency choice, and now rupee invoicing through SRVAs.
• Policy and research institutions — RBI (DEPR, Forex Markets Department), Ministry of Finance, NITI Aayog, NCAER, ICRIER, EXIM Bank: BoP compilation, reserve adequacy, REER monitoring, convertibility road maps.
• Rating agencies, broking and economics research (CRISIL, ICRA, CARE, Motilal Oswal, Nomura, Goldman): quarterly CAD forecasts, external-debt sustainability notes, rupee calls that move bond and equity desks.
• Trade finance, logistics and compliance roles: letters of credit, FEMA and LRS compliance, Export Data Processing and Monitoring System (EDPMS/IDPMS) reconciliation, AD-bank reporting.
• Examination use: BA/MA papers on international economics, UGC-NET, Indian Economic Service, RBI Grade B (Finance & Management / Economics), SEBI, NABARD, and the economics sections of CFA and company placement tests.

Interview questions

• Q: If the BoP always balances, what does a "BoP deficit" mean? A: It refers to a deficit on the autonomous items above the line; it is financed by accommodating items — mainly a drawdown of reserves or official borrowing — which makes the overall accounts add to zero.
• Q: How can India have a current account deficit and still add to reserves? A: If net capital inflows (FDI, FPI, ECBs, NRI deposits) exceed the current account deficit, the surplus is bought by the RBI and shows up as reserve accretion.
• Q: Difference between devaluation and depreciation? A: Devaluation is a deliberate lowering of an official parity under a fixed or pegged regime; depreciation is a market-driven fall in a floating or managed-float regime.
• Q: Why can the rupee depreciate in nominal terms and still lose competitiveness? A: If domestic inflation exceeds partner-country inflation by more than the nominal fall, the REER appreciates, so Indian goods remain relatively dearer.
• Q: What is the Marshall–Lerner condition and why does the J-curve occur? A: Devaluation improves the trade balance only if the sum of export and import demand elasticities exceeds one; in the short run volumes are contracted and inelastic, so the import bill rises first and the balance improves only later.
• Q: Why does the dollar usually trade at a forward premium against the rupee? A: Because Indian interest rates exceed US rates, and covered interest parity forces the forward premium to approximate that interest differential.
• Q: Is India's capital account fully convertible? A: No — the current account has been convertible since August 1994, but capital account convertibility is partial, with calibrated limits such as the LRS cap, ECB rules and FPI debt limits.
• Q: State the impossible trinity and India's choice. A: A country cannot simultaneously have a fixed exchange rate, free capital mobility and independent monetary policy; India opts for monetary autonomy with a managed float and partial capital controls, cushioned by large reserves.
• Q: Which items make up India's invisibles, and why do they matter? A: Net services, primary income and current transfers; the services and remittance surpluses cover most of the merchandise deficit and keep the CAD manageable.
• Q: How do you judge whether reserves are adequate? A: By import cover (months of imports), the ratio of reserves to short-term external debt on residual maturity (the Greenspan–Guidotti rule), and reserves to broad money — not by the absolute dollar figure.
• Q: What does Dornbusch overshooting explain? A: That because goods prices are sticky while asset markets clear instantly, a monetary shock makes the exchange rate move beyond its long-run equilibrium before converging back.
• Q: What changed legally when FEMA replaced FERA? A: Foreign exchange violations ceased to be criminal offences and became civil contraventions, and the regime shifted from control to management — current account transactions free unless restricted, capital account transactions restricted unless permitted.
• Q: Why is a rising CAD not automatically bad? A: If it finances productive investment and is funded by stable flows such as FDI, it reflects investment exceeding domestic saving; the danger lies in financing by volatile portfolio flows or short-term debt.

Common mistakes

• Confusing the capital account with the financial account — under BPM6 the FDI/FPI/loans sit in the financial account; writing "capital account" is only acceptable as the older Indian presentation, and should be labelled as such.
• Getting the reserve sign wrong: an increase in reserve assets is a debit in BPM6, not a credit.
• Treating a current account deficit as a BoP deficit, or assuming a deficit must mean falling reserves.
• Mixing direct and indirect quotes mid-calculation, and so inverting the real exchange rate or the PPP ratio; always fix e as ₹ per unit of foreign currency first.
• Forgetting to annualise the forward premium, or using annual interest rates with a three-month forward in the CIP formula without dividing by four.
• Applying the Marshall–Lerner condition to an initially unbalanced trade position without saying so, and expecting an immediate improvement despite the J-curve lag.
• Quoting stale numbers — reserves, the CAD ratio and the rupee rate change weekly; cite the RBI's Weekly Statistical Supplement or quarterly BoP release and state the period of the figure.

Related topics

International trade theories · Trade policy, WTO and India's trade agreements · Open-economy macroeconomics · Globalisation and FDI · IMF, World Bank and international finance · Monetary policy and inflation in India