Global debt has crossed the $365 trillion mark, and the cost of servicing it is climbing faster than any government can manage. For investors with capital deployed anywhere, few risks will matter more over the next two years.
Asia is a major financier of Western borrowing through its central bank reserves and household savings, and it is now feeling the consequences in its own bond markets and currencies. Government borrowing costs across the G7 are higher than at any point since mid-2008, the summer before the global financial system nearly collapsed—and the debt those costs apply to is vastly larger today.
The Institute of International Finance, which reports that global debt rose by more than $10 trillion in the first half of this year alone, attributes the surge to an electoral cycle that rewards short-term fixes and punishes fiscal restraint. In 1997, Thailand, Indonesia, and South Korea were forced to cut spending and raise interest rates as the price of international rescue. Now, the IIF warns that the United States, Japan, France, and the UK face persistently large deficits and rising interest bills—problems long associated with struggling emerging-market sovereigns—yet none is being compelled to implement remotely comparable discipline.
Advanced economies paid more than $3.3 trillion in interest on internationally traded government debt last year, exceeding global spending on artificial intelligence, defense, or clean energy. G7 interest bills have risen nearly 85%, and with deficits already large, much of that bill is met with fresh borrowing. Higher rates enlarge interest bills, bigger bills widen deficits, and wider deficits demand more issuance. That issuance forces governments to offer higher yields to attract buyers, pushing rates up again.
The 10-year US Treasury yield hit 5.15% this week, its highest since 2007, and 30-year yields touched 5.45%, levels unseen since 2004. At a recent five-year Treasury auction, indirect bidders—including foreign central banks—took just 54% of the sale, down from a typical 65%. More than $30 trillion of debt across mature and emerging markets is approaching maturity, much of it issued when money was nearly free. Rolling it over at the highest rates in a generation will swell interest bills for a decade or more.
Asia's exposure and the risk of contagion
Asia is on the front line. Malaysia's 10-year bond now trades at its widest discount to US Treasuries since 2007, and Indonesian and Thai spreads are close to similar extremes. When US government debt pays more than most of emerging Asia, capital has an incentive to leave, and regional currencies come under strain. Policymakers across the region must choose between tightening to defend their currencies at the expense of growth, or protecting growth at the risk of capital flight.
The Reserve Bank of Australia is widely expected to hike next week, with Australian 10-year yields already at levels last seen in 2011. Japan's 10-year yield has reached 3.08%, the highest since 1996, even as manufacturing growth slows to a seven-month low. With public debt well above twice the size of its economy, every rise in yields bites straight into the budget. Japan is also the largest foreign holder of US Treasuries; higher yields at home give its insurers and pension funds a compelling reason to repatriate money, and a sustained shift would strip away a pillar of demand for US and Western debt, pushing global yields still higher.
China led a $6.5 trillion surge in emerging-market debt in the first half, lifting the total above $110 trillion, and its local government liabilities carry a heavy refinancing burden. While much of emerging Asia holds deeper reserves and sturdier external positions than in 1997, no buffer fully offsets a world where risk-free US paper pays above 5%. Stocks and bonds sold off together this week on inflation and fiscal fears, undermining the long-held belief that government bonds reliably cushion equity losses.
Governments have learned that inflation is the least painful way to shrink debt. The IIF attributes most of the 25-percentage-point fall in global debt-to-GDP since 2021 to inflation; almost none came from repayment, and savers bore the cost. Nominal yields that look generous can prove expensive in real terms. For investors in Asia, currency exposure now matters as much as asset selection, since swings against the dollar can erase years of returns in months.
Diversification across regions, currencies, and asset classes, along with close scrutiny of sovereign and corporate balance sheets, carries more weight than at any time in the past 15 years. Asia paid heavily for fiscal failure in 1997, and now it risks paying again for someone else's. Investors should be asking which bond market buckles first, and whether their portfolios can withstand the shock. For a deeper look at how regional dynamics are shifting, see our analysis on prediction markets and their influence and China's rise in global research.
