Global Imbalances: Savers and Spenders

Why some countries run persistent trade surpluses while others run deficits, how savings flow between them, and why economists worry about large imbalances.

Some countries consistently export more than they import and save more than they invest. Others do the opposite. These patterns are called global imbalances.

Surplus and deficit countries

Surplus countries, such as China, Germany, the Netherlands and oil exporters like Saudi Arabia, sell more to the world than they buy and lend their surplus savings abroad.
Deficit countries, especially the United States, buy more than they sell and borrow from the rest of the world.

Savings and investment

A country’s current account balance equals its savings minus investment. A surplus means a country saves more than it invests at home, lending the rest abroad. A deficit means it borrows from abroad to fund investment and consumption.

The savings glut

In 2005, Ben Bernanke, then a Federal Reserve governor, argued that a “global savings glut” - high saving in Asia and oil-exporting countries - was flowing into the US, pushing down interest rates and helping to fuel the US housing boom.

Why imbalances arise

High saving due to ageing populations, weak social safety nets or policies favouring exports.
Exchange rate policies keeping currencies cheap.
Reserve currency status: global demand for dollar assets makes it easy for the US to borrow.
Consumer demand and government deficits in deficit countries.

Why economists worry

Large deficits can make countries dependent on foreign funding, which can stop suddenly.
Surpluses in some countries may reflect weak domestic demand.
Imbalances can fuel asset bubbles and trade tensions. Large US deficits with China fed political pressure for tariffs.

India’s position

India usually runs a modest current account deficit, funded by foreign investment. Keeping it manageable is important for stability.

The bond purchase

A Chinese exporter earns dollars selling goods to the US. China's central bank accumulates these dollars and invests them in US Treasury bonds. In effect, China lends its savings to the US, which uses them to buy more Chinese goods.

Thinking a trade surplus always means a strong economy

Surpluses can reflect weak domestic demand or high savings; deficits can reflect strong investment. Context matters.

Key takeaways

Global imbalances are persistent surpluses and deficits across countries.
The current account equals savings minus investment.
Bernanke's 2005 "savings glut" linked Asian and oil savings to low US rates.
Large imbalances can fuel bubbles, funding risks and trade tensions.