This article was written by Pierre-Olivier Gourinchas, Christian Mumssen of the International Monetary Fund (IMF).

Global current account imbalances are widening again, reversing a decade of steady decline following the global financial crisis.

History suggests a clear risk: Widening imbalances have often been accompanied by concentrated and lower-quality growth, triggered sectoral dislocations across trading partners, and preceded financial crises or abrupt reversals of capital flows. With the global economy already absorbing multiple shocks, such a disorderly adjustment could be exceptionally costly.

This renewed widening has revived questions about which policy tools can meaningfully impact external positions. In particular, the recent expansion of industrial policies and the proliferation of trade restrictions have diverse economic and non-economic motives, but are often justified by the objective of reducing current account imbalances. Yet there is limited analytical and empirical clarity on how these policies affect external balances.

Our new policy paper aims to fill this gap by linking domestic drivers to external outcomes. We conclude that traditional macroeconomic policies remain the dominant drivers of external balances and are the best lever for addressing current account imbalances.

Our analysis suggests that tariffs only improve the current account in a limited set of circumstances, and generally have modest and uncertain effects on the current account. Industrial policies, when applied with economy-wide tools, can have larger impacts by raising national saving and compressing domestic demand.

Saving and investment

For any economy, the current account reflects the difference between what its people, businesses, and government save and invest. This concept anchors the IMF’s long-standing analytical framework for external sector assessments.

Policies affect the current account to the extent that they alter saving or investment. This depends not just how policies affect activity today, but also how they shift expectations. Personal saving rises when people expect income to decline, and it falls when they expect increased income. Companies invest based on their outlook for returns, not just today’s profitability. This insight is central to understanding why many trade and industrial policies often have limited or counterintuitive impacts on the current account.

We can see how standard macroeconomic policies have driven some of the recent increase in global imbalances: bigger budget deficits and robust consumer spending have lowered saving in the United States, while weaker demand and higher saving in China have followed its real estate slowdown.

Of course, positive or negative current account balances are not inherently undesirable, as they can reflect structural factors such as countries saving more as their population ages. It is also important to bear in mind that the relevant metric for assessing imbalances is the overall current account position of a country against the rest of the world, not bilateral or sectoral balances. Nor are imbalances simply about misaligned exchange rates and price competitiveness. A meaningful diagnosis requires a full macroeconomic assessment of influences on saving and investment, including policy drivers and structural forces.

Policy details matter

Tariffs have been justified as a way to narrow trade deficits. However, our analysis finds that they have only small and unreliable effects on the current account because they are often perceived as permanent or are frequently retaliated against. In such cases, people do not adjust saving in anticipation of future price changes. The result is a nearly unchanged current account.

There is one important exception: temporary tariffs can raise saving by encouraging people to postpone consumption. In theory, this can increase the current account balance, though such episodes are rare, and empirical evidence suggests the effects are modest and short-lived.

Industrial policies are more diverse—and so are their effects. We distinguish two types of industrial policies: micro, which target specific companies or sectors, and macro, which are economy-wide policies that are often combined with financial or capital account restrictions.

Micro industrial policies—such as subsidies for a specific industry or targeted tax incentives—generally have ambiguous and limited effects on the current account. When they succeed in raising aggregate productivity, they tend to boost investment and consumption, often lowering the current account balance. When they fail, for example by misallocating resources and depressing productivity, they can increase the current account balance, but at the cost of lost output. Either way, large and systematic effects on external balances are uncommon.

Macro industrial policies, by contrast, can have larger effects. These strategies, often associated with export-led growth models, combine foreign asset accumulation, capital flow restrictions, financial repression, or other mechanisms that boost national saving. These policies work not by improving efficiency but by forcing saving, often at the expense of economic welfare. The current account balance increases, but mainly because domestic demand is restrained and resources are redirected toward external surpluses.

The conclusion is clear: industrial policies and tariffs are not shortcuts to external rebalancing. When they affect the current account, they often do so by suppressing consumption or investment—hardly a recipe for sustainable growth.

Durable rebalancing still depends on sound domestic policies, not trade barriers.

Future imbalances and output

Applying our findings to the current economic picture, scenario analysis shows that global imbalances could widen further if trends persist. This would reflect continued large fiscal deficits and strong domestic demand in the United States, additional government support to exporters in China alongside weaker safety net provision and consumption, and subdued investment and weak productivity growth in Europe.

In this setting, an escalation of tariffs does little to change current account positions, largely because these measures are reciprocated or perceived as permanent, but it does lower output across regions.

By contrast, an alternative scenario anchored in domestic rebalancing—fiscal consolidation in deficit countries, more consumption‑led growth in surplus economies, and productivity‑enhancing investment elsewhere—would narrow global imbalances and raise global output.

This synchronized adjustment would lead to the best outcome for the global economy. The economic drag from US fiscal tightening would be offset by stronger demand from China and Europe. But even if such coordination proves difficult, the best course of action for each country is clear: start addressing domestic imbalances now, regardless of what others do. Delaying adjustment poses a threat to domestic and global economic stability. Unilateral adjustment will also add pressure for other economies to adjust. Stronger domestic demand in China, by lifting global demand, would increase global interest rates and make fiscal adjustment more likely in other regions such as the United States.Fiscal consolidation in the United States could further stoke deflationary forces in China and incentivize efforts to boost consumption.

What is clear is that global imbalances will be shaped by domestic macroeconomic trajectories and policies rather than by tariffs or narrowly targeted industrial policies. It’s also evident that reducing global imbalances works best when countries move together. The IMF, though its analysis, policy advice, and convening power, can help its members move toward this better outcome.

Picture: WSJ

The post Global Imbalances: Old Questions, New Answers? first appeared on Earthnews365.

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