Devaluation

Also called: Rupee devaluation · Topic: Balance of Payments and Exchange Rates · NCERT: Class 11, Ch 3 "Liberalisation, Privatisation and Globalisation: An Appraisal"; Class 12, Ch 6 "Open Economy Macroeconomics"

Meaning

Devaluation is a deliberate decision by the government or central bank to lower the official value of the domestic currency under a fixed (pegged) exchange-rate system. In India's ₹ per $ form of writing the rate, this means the official ₹/$ rate is raised (for example, ₹50 → ₹60), so each rupee buys fewer dollars.

It matters because it is a policy tool, not a market accident. Countries use it to make exports cheaper and imports dearer. They are often forced into it when their forex reserves run out, as India was in 1991.

Formula (% devaluation, measured on the ₹/$ rate): % devaluation = (New ₹/$ rate − Old ₹/$ rate) ÷ Old ₹/$ rate × 100

Explanation

How devaluation works

• Exchange rate (the price of one currency in terms of another) is written in India as ₹ per $.
• ₹/$ rises (₹50 → ₹70): each dollar costs more rupees, so the rupee is weaker.

• ₹/$ falls: the rupee is stronger.

• Under a fixed exchange rate, the government announces a rate. The central bank buys or sells forex at that rate, so the market price cannot move away from it.

• Devaluation means the government announces a new, higher ₹/$ rate. The central bank then defends this new rate.
• Effect on trade:
• Exporters get more rupees for each dollar they earn, so exports rise and the supply of $ rises.
• Imports cost more in rupees, so the demand for $ falls.

• The trade deficit (imports greater than exports) should shrink.

• Rate fixed above the market rate (Class 12, Fig. 6.3):

• Say the market rate is ₹50/$ and the government fixes ₹70/$.
• At ₹70, supply of $ = $120 bn and demand = $90 bn. The gap AB is $30 bn.
• The RBI must buy $30 bn. It pays ₹70 × 30 bn = ₹2,100 bn (₹2.1 lakh crore) in new rupees.
• Side effect: reserves pile up, but domestic money supply also rises.

Why a country devalues: reserves, black markets and speculative attacks

• Rupee kept artificially strong (rate fixed below the market rate):
• Imports are cheap, so demand for $ is greater than supply.
• The RBI must sell dollars from its reserves to fill the gap.
• Reserves are limited. When they run out, people pay more for dollars illegally. This creates a black market for foreign exchange (an illegal market where the dollar sells above the official rate).

• Devaluing to a realistic rate ends this pressure.

• Credibility: a fixed rate works only if people believe the government has enough reserves to defend it.

• Speculative attack (a rush to sell a currency because people expect it to be devalued):
• Reserves look too small, so speculators expect devaluation.
• They sell the domestic currency and buy forex.
• The central bank loses even more reserves defending the peg.

• It is finally forced to devalue or float. The fear makes itself come true.

• Examples:

• Repeated attacks came before the Bretton Woods system collapsed in the early 1970s. Bretton Woods (1944 to early 1970s) was a "fixed but adjustable" system in which a peg could be changed only when there was a "fundamental" imbalance.
• Black Wednesday (16 Sept 1992): the UK pound was forced out of the ERM (European Exchange Rate Mechanism).
• Thai baht (2 July 1997): Thailand floated the baht, which set off the Asian financial crisis.

Measuring devaluation: the two-percentage trap

• Worked example: the rupee is devalued from ₹50 to ₹60 per $.
• Change in the ₹/$ rate = (60 − 50) ÷ 50 × 100 = 20%.

• Change in the rupee's value in dollars: 1/50 = $0.020 falls to 1/60 = $0.0167. That is a fall of about 16.7%.

• Exam trap: the two percentages differ. Check whether the question asks about the ₹/$ rate or the rupee's value in dollars.

Does devaluation always fix the trade deficit?

• J-curve effect:
• Just after the rupee is made cheaper, the trade balance first gets worse. Import contracts are already signed, so the same quantity now costs more rupees.
• Over time, export and import volumes adjust, and the balance improves.

• Plotted against time, the line dips and then rises, like the letter "J".

• Marshall-Lerner condition: a cheaper currency improves the trade balance only if |e_X| + |e_M| > 1.

• e_X is the price elasticity of demand for exports and e_M is the price elasticity of demand for imports. Elasticity measures how strongly the quantity bought reacts to a change in price.

• Worked example (10% fall in the rupee):

• If e_X = 0.6 and e_M = 0.7, the sum is 1.3 > 1. Volumes react enough, and the trade balance improves.
• If e_X = 0.2 and e_M = 0.3, the sum is 0.5 < 1. The higher import bill is bigger than the volume gains, and the trade balance worsens.

In India

• 1991 BoP crisis (Class 11): India's forex reserves could pay for only about two weeks of imports. This forced devaluation and started the LPG (Liberalisation, Privatisation, Globalisation) reforms.
• July 1991 devaluation: during the external payments crisis, the rupee was devalued in two stages (1 and 3 July 1991). The total was about 18% in USD terms [3].
• After 1991, India moved step by step from an official rate to a market rate:
• March 1992: LERMS (Liberalised Exchange Rate Management System) began. It was a dual exchange rate system: part of forex earnings was converted at the official rate and the rest at the market rate [2][3].
• 1 March 1993: LERMS was replaced by a unified, market-determined exchange rate [2][3].
• August 1994: the rupee became convertible on the current account (freely exchangeable for trade and similar payments), and India accepted Article VIII of the IMF's Articles of Agreement [3].

• 1999: FEMA replaced FERA, 1973. The old law punished forex violations as crimes; the new one "manages" forex [3].

• Why this matters for the word "devaluation" today:

• The rupee is now market-determined, so a fall in the rupee is depreciation, not devaluation.
• The RBI (Reserve Bank of India, India's central bank) intervenes only to curb excess volatility (sharp up-and-down swings), without targeting any fixed level [5].

• The IMF 2025 Article IV report classifies India as de jure floating (what India officially says) and de facto crawl-like (what the IMF sees in the data) [5].

• The buffer against another 1991: India's forex reserves were US$ 698.19 bn (week ended 25 July 2025). Of this, foreign currency assets were US$ 588.93 bn and gold was US$ 85.70 bn [4]. Compare this with about two weeks of import cover in 1991.

Don't confuse with

• Depreciation: it is caused by market forces under a flexible regime. Devaluation is a government decision under a fixed regime. The rupee becomes cheaper in both cases.
• Revaluation: the opposite of devaluation. The government lowers ₹/$, so the rupee becomes dearer. Its market-driven twin is appreciation.
• Competitive devaluation: countries deliberately weaken their currencies to make their exports cheaper, at trade partners' cost. Partners then retaliate, and in the end nobody gains. Examples are the 1930s "beggar-thy-neighbour" policies and the 2010 "currency wars". Ordinary devaluation is usually a one-country fix for a BoP problem.
• Crawling peg: the peg is adjusted periodically in small steps, often in line with inflation differences. Devaluation is usually a one-time, announced jump in the official rate.

Prelims Hooks

• Devaluation = government act, fixed regime. Depreciation = market outcome, floating regime (NCERT Class 12, Q7).
• In ₹/$ terms, devaluation means the rate rises (e.g. ₹50 → ₹60). A higher ₹/$ number means a weaker rupee.
• ₹50 → ₹60 per $ is a 20% rise in the ₹/$ rate, but only about a 16.7% fall in the rupee's value in dollars.
• July 1991: a two-stage devaluation (1 and 3 July), about 18% in total in USD terms [3].
• Sequence after 1991: LERMS (March 1992) → unified market-determined rate (1 March 1993) → current-account convertibility and IMF Article VIII (August 1994) [2][3].
• A devaluation improves the trade balance only if the Marshall-Lerner condition holds (|e_X| + |e_M| > 1). Even then, the J-curve means the balance first gets worse.

Mains Points

• Lessons of 1991:
• A near-fixed rate with low reserves and a rising current account deficit (more money going out for imports and payments than coming in) invites credibility loss and speculative attack.

• India's reform path shows good sequencing, moving in steps rather than overnight: devaluation → LERMS → unified rate → current-account convertibility [3].

• A cheaper rupee is not a cure-all:

• J-curve lags and low elasticities (Marshall-Lerner) limit the export gains.
• India's main imports (oil, electronics, gold) are price-inelastic: people keep buying them even when they cost more. So a cheaper rupee raises the import bill and feeds inflation.
• Structural competitiveness (logistics, productivity, PLI) matters more than a weak rupee.

• Deliberate weakening also risks retaliation (competitive devaluation). It invites scrutiny such as the US Treasury's currency-manipulation monitoring list, which India has been on at times.

• Why India chose a managed float instead of repeated devaluations:

• Large reserves (US$ 698.19 bn, July 2025 [4]) let the RBI smooth sharp swings without fixing a level.
• Critique: the IMF's "crawl-like" classification [5] suggests heavy intervention. That can weaken the rupee's role as a shock absorber, meaning a currency that adjusts on its own to absorb external shocks.

Related concepts

• Fixed exchange rate
• Revaluation
• Black market for foreign exchange
• Speculative attack
• Managed floating
• Forex intervention
• Crawling peg
• Currency board
• Impossible trinity
• Competitive devaluation

Read more

• Exchange-rate regimes: fixed, floating and managed float