Savings Glut/Trade Deficit

Analysis of global saving, capital flows, current-account imbalances, exchange rates, and trade deficits. The archive explores how domestic policies and international demand for assets connect surplus and deficit economies.

AI Summary. China's exports rose 36% from a year earlier and imports 31%, widening its monthly trade surplus to almost $134bn and putting the annual surplus on track to exceed the $1.2tn record. High-tech shipments jumped almost 64%, which Bloomberg Economics estimates accounted for about half of total export growth.

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China’s goods trade surplus is on track to exceed 2025’s $1.2T. China’s trade surplus with the EU is up 21% y/y.

Is China's trade surplus heading to a new record on export growth?

Core argument: China’s exports rose 36% year-over-year in September, the fastest pace since February, while imports rose 31%, widening the monthly trade surplus to almost $134 billion and exceeding every forecast in a Bloomberg survey of economists.

China’s export growth surged the most since February to drive global imbalances to new highs, with its trade surplus this year on track to exceed the $1.2 trillion record set in 2025. Shipments abroad soared 36% last month from a year earlier and imports jumped 31%, data released by China’s General Administration of Customs showed on Wednesday. As a result, the surplus for September widened to almost $134 billion, exceeding every forecast in a Bloomberg survey of economists. The imbalance has continued to balloon since US President Donald Trump ramped up tariffs soon after reclaiming the White House at the start of last year, showing the limits of the policy in the middle of the AI buildout. Shipments of high-tech products soared almost 64% in September, which Bloomberg Economics estimates contributed around half of China’s total export growth.

Takeaways by Macro Roundup® AI

  1. China’s exports rose 36% year-over-year in September, the fastest pace since February, while imports rose 31%, widening the monthly trade surplus to almost $134 billion and exceeding every forecast in a Bloomberg survey of economists.
  2. China’s trade surplus this year is on track to exceed the $1.2 trillion record set in 2025, with the imbalance continuing to grow after US President Donald Trump raised tariffs at the start of last year.
  3. Chinese shipments of high-tech products soared almost 64% in September, contributing around half of total export growth, according to Bloomberg Economics estimates.

AI Summary. The United States generates almost twice as much economic output per dollar invested as China, the opposite of what would be expected from a mature developed economy versus a fast-growing economy catching up. The gap points to overexuberance in Chinese investment.

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The US generates ~2x as much output per dollar of capital as China. Rivaton and Southwood argue that relentless competition among Chinese subnational governments, who account for ~85% of public expenditure, drives industrial growth at the cost of reduced capital efficiency.

Does China get less economic output per dollar invested than America?

Core argument: The United States obtains nearly twice as much GDP from every dollar invested as China does, measured by the capital efficiency ratio of output to invested capital stock.

Overexuberance is visible in economic data. Interest rates that banks pay to depositors are capped, giving banks artificially cheap capital. Entrepreneurs may be backed to attempt extremely unlikely, borderline schemes. The capital efficiency ratio measures how much output a country gets out of the capital stock it has invested – how many dollars of GDP a country can buy with a dollar of investment. The United States gets almost twice as much economic output out of every dollar it invests as China does, precisely the opposite of what we would expect from a developed country with a mature economy versus a rapidly growing country playing catch up.

Takeaways by Macro Roundup® AI

  1. The United States obtains nearly twice as much GDP from every dollar invested as China does, measured by the capital efficiency ratio of output to invested capital stock.
  2. China’s capital efficiency inverts the expected pattern, in which a rapidly growing catch-up economy would extract more output per dollar of investment than a mature developed economy.
  3. Overexuberance is visible in Chinese macroeconomic data, with China’s investment generating less economic output per dollar than that of the United States.

AI Summary. Global current account balances widened to about 3.8% of world GDP, driven mainly by a rise in China's surplus to about 0.6% of world GDP (3.7% of China's GDP) and larger surpluses across other Asian economies, while the United States remained the largest deficit economy at about 1% of world GDP. Imbalances are projected to remain elevated.

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Global current account balances increased further in 2025 to ~3.8% of global GDP. The IMF calculates the rise was driven by a sharp increase in China’s surplus to ~.6% of global GDP (3.7% of China’s). The US deficit was ~1% of global GDP.

Are global current account imbalances widening as China's surplus grows?

Core argument: Global current account balances widened to about 3.8% of world GDP in 2025, continuing the upward trend since the pandemic and reversing the post-global-financial-crisis decline.

Global current account balances increased further in 2025 to about 3.8% of world GDP, continuing the upward trend observed since the pandemic and reversing the decline following the global financial crisis. The widening was driven primarily by a sharp increase in China’s surplus, which increased to about 0.6% of world GDP (3.7% of China’s GDP), alongside larger surpluses in several Asian economies, whereas the euro area surplus narrowed and oil exporters’ surpluses declined. At the same time, the United States remained the world’s largest deficit economy, with a current account deficit of about 1% of world GDP. Early 2026 trade data indicate that global imbalances are expected to increase slightly this year and are projected to remain elevated in 2027, with further increases in trade surpluses in China and other Asian exporters and weaker balances in the United States and the euro area.

Takeaways by Macro Roundup® AI

  1. Global current account balances widened to about 3.8% of world GDP in 2025, continuing the upward trend since the pandemic and reversing the post-global-financial-crisis decline.
  2. China’s surplus rose to about 0.6% of world GDP (3.7% of China’s GDP), driving the widening alongside larger surpluses in several Asian economies, while the euro area surplus narrowed and oil exporters’ surpluses declined.
  3. The United States remained the world’s largest deficit economy at a current account deficit of about 1% of world GDP, and early 2026 trade data indicate global imbalances are expected to increase slightly in 2026 and remain elevated in 2027.

AI Summary. China's export growth accelerated after its currency depreciated, which the author argues is evidence that exchange rate moves, not just domestic demand, drive its trade surplus. Because Chinese domestic demand growth no longer pulls in imports, the author contends there is no realistic path to balanced trade without a stronger renminbi.

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China’s export growth accelerated following the RMB’s depreciation in 2022, underscoring the role of exchange rates as a factor in external adjustment. Since rising domestic demand no longer lifts imports, Setser argues, reducing China’s trade surplus will require a stronger RMB.

Does balancing China's trade require a stronger currency?

Core argument: China requires a 1.5 percentage point contribution from net exports to growth each year, putting it on a collision course with trading partners absent a currency correction that supports more balanced trade even without trade restrictions.

The best evidence that exports responded to changes in the currency, and not simply to changes in the path of China’s internal demand, is the acceleration in China’s export growth after the RMB’s depreciation over the course of 2022. Those who believe the path of internal demand is critical to rebalancing and that exchange rate moves are secondary need to explain how an acceleration in domestic demand would, on its own, lead China’s external accounts to adjust. One important, stylized fact about China is that domestic demand growth is no longer feeding over to import growth (ex-gold, that is). Bottom line: China, which needs a 1.5 percentage point contribution from net exports every year, is on a collision course with its trading partners without a currency correction that provides the basis for more balanced trade even in the absence of trade restrictions. And there isn’t a realistic path towards balance that doesn’t involve a stronger RMB; there aren’t, as Paul Krugman once put it, immaculate transfers.

Takeaways by Macro Roundup® AI

  1. China requires a 1.5 percentage point contribution from net exports to growth each year, putting it on a collision course with trading partners absent a currency correction that supports more balanced trade even without trade restrictions.
  2. The acceleration in China’s export growth following the renminbi’s depreciation over 2022 is the best evidence that exports responded to the currency rather than to the path of China’s internal demand.
  3. Domestic demand growth in China no longer feeds through to import growth, excluding gold, and no realistic path toward external balance avoids a stronger renminbi.

AI Summary. Foreign investors made roughly $1.5tn in net purchases of US equities from the start of 2024 through July, with chipmaking economies like South Korea and Taiwan helping fund American tech firms' AI buildout. Bloomberg Economics estimates about 20% of foreign US equity holdings were AI-related in 2025, versus roughly 10% in 2019.

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The profits of South Korean and Taiwanese firms are flowing into AI-related US equities. A Bloomberg analysis found ~20% of all foreign holdings of US equities were in AI-related sectors, up from ~10% in 2019.

Are foreign investors funding America's AI buildout?

Core argument: Foreign investors held roughly $4.9 trillion of US-listed shares in AI-centered industries at the end of June, a sum roughly equivalent to Germany’s annual GDP, according to Bloomberg Economics’ analysis of Treasury data.

The AI boom is creating massive demand for high-end chips and new pools of savings in places that make them like South Korea and Taiwan which are flowing to fund American tech companies and their $9 trillion AI build out. Foreign investors made roughly $1.5 trillion in net purchases of US equities alone since the beginning of 2024 through the end of July. A Bloomberg Economics analysis of Treasury data shows that in 2025 roughly 20% of all foreign holdings of US equities were in AI-related sectors, up from roughly 10% in 2019. That number has grown with soaring valuations since then. But even assuming that 20% level, foreign investors had about $4.9 trillion of exposure to US-listed shares of companies in industries at the center of the AI boom at the end of June. That’s roughly equivalent to Germany’s annual GDP.

Takeaways by Macro Roundup® AI

  1. Foreign investors held roughly $4.9 trillion of US-listed shares in AI-centered industries at the end of June, a sum roughly equivalent to Germany’s annual GDP, according to Bloomberg Economics’ analysis of Treasury data.
  2. AI-related sectors accounted for roughly 20% of all foreign holdings of US equities in 2025, up from roughly 10% in 2019, per Bloomberg Economics’ analysis of Treasury data.
  3. Foreign investors made roughly $1.5 trillion in net purchases of US equities from the start of 2024 through the end of July, with savings from chipmaking economies such as South Korea and Taiwan flowing to American tech companies and their $9 trillion AI build-out.

AI Summary. Japan, China, South Korea and Taiwan together hold just under $30tn in gross foreign assets, a five-fold rise over two decades, and about $10tn in net foreign assets. The author argues a current account surplus dominated by investment income, which tends to be reinvested abroad, generates less currency appreciation pressure than one driven by trade.

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Northeast Asia’s ~$10T in net foreign assets would yield $400B annually at 4%, versus its ~$600B mean current-account surplus. Unlike export earnings, much investment income is reinvested abroad, creating less appreciation pressure.

Does investment income create less currency appreciation pressure than trade surpluses?

Core argument: Japan, China, South Korea and Taiwan together hold just under $30tn in gross foreign assets, a five-fold increase over the past two decades, with net foreign assets of about $10tn after liabilities to foreigners.

Japan, China, South Korea and Taiwan now hold nearly US10T net. At a 4% return, those net assets would generate roughly $600B over the past decade. The composition matters for exchange rates: exporters typically convert more of their foreign earnings into local currency to meet domestic costs, while foreign investment income is more likely to be reinvested abroad. A current-account surplus increasingly driven by investment income therefore creates less appreciation pressure than an equivalent trade surplus.

Takeaways by Macro Roundup® AI

  1. Japan, China, South Korea and Taiwan together hold just under $30tn in gross foreign assets, a five-fold increase over the past two decades, with net foreign assets of about $10tn after liabilities to foreigners.
  2. At the current 4% federal funds rate, $10tn of net foreign assets would imply roughly $400bn a year in net investment income for the four Northeast Asian economies, against a combined current account surplus averaging about $600bn over the last decade.
  3. A current account surplus dominated by investment income generates less appreciation pressure than one dominated by trade, as exporters are more likely to repatriate and convert dollar earnings to cover domestic input costs while investment-income earners are more likely to reinvest abroad.

AI Summary. Foreign investors made a record $942bn in net purchases of US stocks and investment fund shares over 12 months, the highest rolling 12-month total in Treasury data going back to 1985. Foreign demand for US debt securities moved in the opposite direction, falling to a net $188bn in the second quarter from $314bn in the first.

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Foreign investors bought a record net $426B of US equities and fund shares in Q2, up 62% y/y, part of a record $942B in the 12 months through July. Overseas investors bought a net $188B of US debt securities in Q2, down from $314B in Q1.

Are foreign investors shifting from US debt into US stocks?

Core argument: Foreign investors made a record $942bn in net purchases of US equities and investment fund shares in the 12 months to July, the highest rolling 12-month total in Treasury data going back to 1985.

Foreign investors made a record $942bn in net purchases of US equities and investment fund shares in the 12 months to July, accelerating a shift in overseas investment towards American stocks and away from debt. The flows represented the highest rolling 12-month total in Treasury data going back to 1985. Net purchases of US equities and investment fund shares by foreign investors jumped to $426bn in the second quarter, up 62% from the same period in 2025, and surpassing the previous quarterly record of $299bn in 2022, according to the Bureau of Economic Analysis. Foreign demand for US debt moved in the opposite direction. Overseas investors bought a net $188bn of US debt securities in the second quarter, down from $314bn in the first.

Takeaways by Macro Roundup® AI

  1. Foreign investors made a record $942bn in net purchases of US equities and investment fund shares in the 12 months to July, the highest rolling 12-month total in Treasury data going back to 1985.
  2. Net foreign purchases of US equities and investment fund shares reached $426bn in the second quarter, up 62% from the same period in 2025 and above the prior quarterly record of $299bn in 2022, according to the Bureau of Economic Analysis.
  3. Overseas investors bought a net $188bn of US debt securities in the second quarter, down from $314bn in the first.

AI Summary. China faces three options as external demand weakens: shift a larger share of national income to households so consumption absorbs more output, keep relying on investment despite weak returns, or let production and growth slow. The first requires substantial changes in income distribution and saving incentives; the second risks more debt and excess capacity; the third implies higher unemployment.

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“Beijing cannot choose whether China will adjust; one way or another, it will.” Pettis warns Zhongnanhai against postponing rebalancing with another round of debt-financed investment “despite increasingly weak returns.”

What choices does China face as external demand weakens?

Core argument: China faces three options: shift a larger share of national income to households so consumption absorbs more output, keep relying on investment despite weak returns, or allow production and growth to slow.

What it can choose is how painful that adjustment will be. If weaker external demand is met by encouraging more borrowing and domestic investment, regardless of whether that investment is economically justified, China risks postponing the inevitable. China therefore faces the same basic choice Japan confronted, but with deeper imbalances and less accommodating global conditions. It can shift a larger share of national income toward households and allow consumption to absorb more of what the economy produces; or it can continue relying on investment, despite increasingly weak returns; or it can allow production and growth to slow. The first choice requires a substantial change in the domestic distribution of income and the incentives to save. The second risks still more debt and excess capacity and, ultimately, a more painful adjustment. The third implies higher unemployment and weaker growth.

Takeaways by Macro Roundup® AI

  1. China faces three options: shift a larger share of national income to households so consumption absorbs more output, keep relying on investment despite weak returns, or allow production and growth to slow.
  2. China confronts the same basic choice Japan faced, but with deeper imbalances and less accommodating global conditions, and can choose only how painful the adjustment will be.
  3. Meeting weaker external demand with more borrowing and domestic investment, regardless of whether it is economically justified, risks further debt and excess capacity and a more painful adjustment, while slower growth implies higher unemployment.