Revaluation vs Devaluation: Trade Effects Compared

When a country maintains a fixed or pegged exchange rate, the government can adjust the peg upward (revaluation) or downward (devaluation). These adjustments have opposite effects on trade: devaluation makes exports cheaper and imports more expensive, typically improving the current account in the short term; revaluation does the reverse, raising export prices and lowering import prices. Understanding the trade dynamics of each is essential for analyzing the economic impact of currency adjustments in countries with managed or fixed exchange rates.

Devaluation: Making Exports Cheaper

Devaluation is a downward adjustment to the official exchange rate peg. If a country’s peg is 10 units of domestic currency per 1 unit of foreign currency, and the government resets it to 12 units per 1 foreign currency, the domestic currency has been devalued.

The immediate effect on trade is stark. Exports become cheaper in foreign-currency terms. Suppose a domestically made car costs 100,000 units of domestic currency. Before devaluation, a foreign buyer pays 10,000 units of foreign currency (100,000 ÷ 10 = 10,000). After devaluation to 12:1, the same car costs 8,333 units of foreign currency (100,000 ÷ 12 = 8,333). The car is now 16.7% cheaper to the foreign buyer.

This cheaper export price typically boosts export sales volume. Foreign customers can buy more cars at the lower price; domestic firms become more competitive against rivals from other countries. Export quantity tends to rise.

Imports face the opposite pressure. A foreign good priced at 10,000 units of foreign currency costs 100,000 units of domestic currency before devaluation (10,000 × 10 = 100,000). After devaluation to 12:1, the same import costs 120,000 units of domestic currency (10,000 × 12 = 120,000). The import is now 20% more expensive to domestic consumers.

At this higher price, domestic demand for imports typically falls. Consumers and firms substitute toward domestically made goods. Import quantity tends to decline.

Current Account Improvement from Devaluation

The combined effect—cheaper exports, higher export volume; pricier imports, lower import volume—usually improves the current account (the difference between exports and imports). Fewer goods are flowing out for the same revenue, and fewer foreign goods are flowing in; the deficit shrinks or the surplus grows.

This is the traditional rationale for devaluation in countries with external imbalances. A country running a large current account deficit might devalue to make exports more attractive and imports less affordable, bringing the external account closer to balance.

A numerical example:

Before devaluation:

• Exports: 50 units × 100 units of foreign currency per unit = 5,000 units of foreign currency
• Imports: 100 units × 100 units of foreign currency per unit = 10,000 units of foreign currency
• Current account deficit: -5,000 units of foreign currency

After devaluation to 2:1 from 1:1 (domestic currency weakens):

• Exports: 70 units × 100 units of foreign currency per unit = 7,000 units of foreign currency (quantity rises due to lower price)
• Imports: 60 units × 100 units of foreign currency per unit = 6,000 units of foreign currency (quantity falls due to higher price)
• Current account deficit: -1,000 units of foreign currency

The deficit improved because devaluation made exports more attractive and imports less affordable.

The J-Curve Effect

In reality, the improvement does not happen overnight. After a devaluation, there is often a J-curve effect: the current account initially worsens before it improves.

Why? Contracts for goods are often signed months in advance at prices locked in before the devaluation. Exporters may have agreed to deliver goods at pre-devaluation prices; they do not immediately raise prices when the peg shifts. Importers are stuck paying pre-devaluation prices in foreign currency, which now costs more in domestic currency terms. For a few months, the current account can actually deteriorate—exports are still flowing at old prices (no revenue benefit), while imports are more expensive in domestic terms (larger deficit).

Over time (six to eighteen months), as contracts reset and trade flows adjust to new prices, the current account improves. This lag explains why policymakers must be patient when implementing devaluation.

Revaluation: Making Exports More Expensive

Revaluation is an upward adjustment to the official peg. If the peg moves from 10:1 to 8:1 (fewer units of domestic currency per foreign currency), the domestic currency has been revalued.

Exports now cost more in foreign-currency terms. The same car priced at 100,000 units of domestic currency now costs 12,500 units of foreign currency (100,000 ÷ 8 = 12,500) instead of 10,000. The car is 25% more expensive to foreign buyers.

At the higher price, export demand typically falls. Foreign customers can buy fewer cars or buy from cheaper competitors. Export quantity tends to decline.

Imports become cheaper. A foreign good costing 10,000 units of foreign currency now costs 80,000 units of domestic currency (10,000 × 8 = 80,000) instead of 100,000. Imports are 20% cheaper.

At this lower price, domestic demand for imports rises. Consumers and firms substitute away from domestically made goods toward cheaper imports. Import quantity tends to rise.

Current Account Deterioration from Revaluation

The combined effect—dearer exports, lower export volume; cheaper imports, higher import volume—typically worsens the current account. More foreign goods flow in, fewer domestic goods flow out. A surplus shrinks or a deficit grows.

This is why countries anxious about external deficits generally avoid revaluation. Revaluation makes the trade position worse, not better.

A numerical example:

Before revaluation:

• Exports: 50 units × 100 units of foreign currency per unit = 5,000 units of foreign currency
• Imports: 100 units × 100 units of foreign currency per unit = 10,000 units of foreign currency
• Current account deficit: -5,000 units of foreign currency

After revaluation to 0.5:1 from 1:1 (domestic currency strengthens):

• Exports: 30 units × 100 units of foreign currency per unit = 3,000 units of foreign currency (quantity falls due to higher price)
• Imports: 140 units × 100 units of foreign currency per unit = 14,000 units of foreign currency (quantity rises due to lower price)
• Current account deficit: -11,000 units of foreign currency

The deficit worsened because revaluation made exports less competitive and imports more attractive.

Terms of Trade Effects

Terms of trade (ToT) measure the ratio of export prices to import prices. If export prices rise or import prices fall, the terms of trade improve (the country gets more imports per unit of exports).

Devaluation worsens the terms of trade. Export prices fall in foreign-currency terms, while import prices rise in domestic terms; the country must export more volume to pay for the same quantity of imports.

Revaluation improves the terms of trade. Export prices rise in foreign-currency terms, while import prices fall in domestic terms; the country can import more for the same export volume.

This is a secondary but important effect. A country that revalues gains purchasing power for imports but loses competitiveness in exports. A country that devalues regains export competitiveness but must pay more for imports. Revaluation helps consumers (imports are cheaper) but hurts exporters (less competitive); devaluation helps exporters (more competitive) but hurts consumers (imports are pricier).

When Policymakers Choose Revaluation: The Case of Managed Floats

If revaluation worsens the current account, why would a country do it? Several reasons:

Inflation control. A country with rapid inflation may revalue to make imports cheaper, increasing competition for domestic producers and dampening domestic price growth.

Preventing overheating. If growth is too fast and capacity is strained, revaluation cools demand by making exports less attractive and imports cheaper.

Capital inflows. If a country is receiving large inflows of foreign investment (like China in the 2000s), the currency naturally wants to appreciate. Resisting this appreciation requires large central bank interventions. Allowing or encouraging gradual revaluation can reduce the need for intervention.

Reputational or political goals. A country might revalue to signal strength, stability, or commitment to low inflation—even if the current account deteriorates temporarily.

Devaluation Risks and Spillovers

Devaluation is not cost-free:

Inflation. Imports become more expensive. If imports are inputs (oil, metals, capital equipment), firms’ costs rise, potentially passing price increases to consumers. Core inflation can spike.

Debt denominated in foreign currency. A country with large foreign-currency debt must now pay more in domestic currency. Debt servicing becomes harder.

Competitive devaluation. If multiple countries devalue simultaneously to gain export advantage, the gains cancel out. International trade negotiations sometimes aim to prevent “devaluation wars.”

Pass-through to wages. If workers demand higher nominal wages to offset import price increases, inflation can accelerate further.

Historical Examples

Devaluation: After the 1997 Asian financial crisis, countries like South Korea, Thailand, and Indonesia were forced to devalue sharply. Export competitiveness improved, and within 12–18 months, current account deficits turned to surpluses. But import prices spiked, inflation rose, and real incomes fell temporarily.

Revaluation: China’s gradual revaluation of the yuan against the dollar (from roughly 8:1 in 2005 to 6:1 by 2015) made Chinese exports more expensive. Chinese export growth slowed, but import growth accelerated, and China’s current account surplus narrowed. Domestically, consumers benefited from cheaper imports.

See also