Introduction
The balance of trade, a key component of a country's current account, is the difference between the value of exports and imports of goods and services. When export earnings exceed import expenditure the country runs a trade surplus; when import spending outstrips export revenues it runs a trade deficit. While short-term imbalances are common and can even be beneficial, large and persistent surpluses or deficits can signal deeper problems and produce undesirable consequences for long-term stability and growth.
Why governments should avoid large and persistent trade deficits
A persistent trade deficit often reflects structural weakness in an economy's ability to compete globally. If a country consistently imports more than it exports, domestic producers may be losing ground to foreign competitors due to high unit labour costs, low productivity, outdated production techniques or weak innovation. Over time this dependence on imports can hollow out key domestic industries, causing deindustrialisation and rising unemployment in affected sectors.
Persistent deficits also pressure a country's foreign exchange reserves. Since imports must be paid for in foreign currencies, prolonged deficits require the central bank to draw down reserves to finance the gap. If reserves are substantially reduced, the country may resort to external borrowing, which increases foreign debt and exposes it to exchange rate risk and sovereign credit downgrades if lenders judge the deficit unsustainable.
Sustained deficits can also exert downward pressure on the domestic currency. As demand for foreign currencies rises to pay for imports and demand for the domestic currency falls, the exchange rate depreciates. While depreciation can in theory make exports cheaper and improve the trade balance, it also raises the cost of imports, particularly essentials like food, energy and intermediate inputs, leading to imported inflation that erodes real incomes and can fuel a cost-push spiral.
Why governments should avoid large and persistent trade surpluses
While surpluses are often viewed as more desirable than deficits, large and prolonged surpluses bring their own problems. A persistent surplus may reflect weak domestic consumption and insufficient investment in imported goods, which can lower living standards. Where consumption is low relative to output, citizens may not be fully enjoying the fruits of growth; if households rarely buy imported consumer goods such as foreign electronics, educational services or luxury items, this may indicate a low domestic standard of living even when national income appears high.
Excessive reliance on export-led growth, often the cause of sustained surpluses, can also create imbalances by tying the country's fortunes to the health of external markets. A downturn in key trading partners could sharply reduce export demand and trigger a domestic slowdown. Singapore's export-reliant economy is highly sensitive to global cycles, which is why it remains cautious about overdependence on surpluses.
Persistent surpluses can also trigger international tensions. Trading partners may view a large surplus as evidence of currency manipulation or unfair trade practices, especially if a country is suspected of keeping its currency undervalued to make exports more competitive, prompting retaliatory tariffs or quotas. In the US-China trade tensions, the US accused China of running artificially large surpluses by undervaluing the yuan, resulting in a prolonged trade conflict with mutual tariffs that harmed businesses and consumers on both sides.
Conclusion
While trade imbalances are not inherently problematic in the short run, large and persistent surpluses or deficits can have damaging long-term effects. Deficits risk undermining domestic industry, depleting foreign reserves, raising external debt and fuelling imported inflation. Surpluses, though less immediately alarming, may reflect underconsumption, risk foreign backlash and overexpose the economy to external shocks. Governments should therefore monitor and manage trade balances prudently, striving for a position that supports both domestic resilience and external sustainability.