Could Government Debt Trigger the Next Financial Crisis?

Global public debt is rising as interest costs and refinancing pressures build. Could stress in sovereign bond markets trigger the next global financial crisis?

By Jay Jarwar

8/25/20269 min read

Introduction

When people think of a financial crisis, images of collapsing banks, failing mortgage lenders and panicked investors often come to mind. The 2008 Global Financial Crisis reinforced the idea that excessive leverage and risk-taking within financial institutions can become a source of systemic instability.

But financial crises do not always begin in the same place.

The next major shock could emerge from an area traditionally regarded as one of the safest foundations of the global financial system: government debt.

Over the past two decades, governments borrowed heavily to respond to the Global Financial Crisis, the COVID-19 pandemic, energy shocks and other economic pressures. More recently, spending demands related to ageing populations, defence, infrastructure and strategic industries have added further pressure to public finances.

The IMF's April 2026 Fiscal Monitor estimates that global public debt rose to just under 94% of global GDP in 2025 and, under current policies, could reach 100% of global GDP by 2029.

High debt does not automatically produce a crisis. Governments with strong economies, credible institutions and deep financial markets can sustain substantial debt for long periods.

The concern arises when large debt burdens, elevated interest costs, weak fiscal credibility and fragile financial markets begin reinforcing one another.

Could sovereign debt therefore become an important source of the next global financial crisis?

A World Living on Borrowed Money

Government borrowing is a normal part of modern economic management.

Countries issue debt to finance infrastructure, healthcare, education, defence, emergency support and long-term investment. Borrowing can be particularly valuable during recessions or crises when private demand collapses.

The problem is not debt by itself.

The problem emerges when debt rises persistently faster than the economic and fiscal capacity needed to service it.

The IMF reports that global government interest payments have risen markedly as older, cheaper debt is refinanced at higher rates. Interest costs increased from around 2% of global GDP only a few years ago to nearly 3% in 2025.

Meanwhile, the OECD Global Debt Report 2026 estimates that central governments in OECD economies borrowed about US$17 trillion in 2025 and are expected to borrow around US$18 trillion in 2026.

Much of this does not represent completely new spending.

Governments must continually refinance bonds that reach maturity. OECD sovereign refinancing requirements reached roughly US$13.5 trillion in 2025 and are projected to rise to around US$14 trillion in 2026.

This creates an important vulnerability.

Debt originally issued when interest rates were extremely low may eventually have to be replaced with substantially more expensive borrowing.

As interest costs consume more government revenue, policymakers face increasingly difficult choices between taxation, public spending, investment and further borrowing.

Why Government Bonds Matter to the Entire Financial System

Government bonds are not simply instruments governments use to finance budget deficits.

They are part of the foundation of modern finance.

Banks hold sovereign bonds as liquid assets. Pension funds and insurance companies use them to match long-term liabilities. Investment funds trade them. Central banks use them in monetary-policy operations. Government securities also serve as collateral throughout global financial markets.

The United States Treasury market is especially important because Treasury yields influence the pricing of financial assets around the world.

Mortgage rates, corporate borrowing costs, exchange rates and international capital flows can all be affected directly or indirectly by movements in major sovereign bond markets.

This interconnectedness means that a severe disruption in government debt markets would not remain a problem for finance ministries alone.

It could spread through banks, hedge funds, pension funds, asset managers and funding markets.

The Bank for International Settlements warned in its 2026 Annual Economic Report that high public debt is increasingly interacting with the growing presence of non-bank financial institutions in sovereign bond markets, creating what it describes as a new fiscal-financial stability nexus.

This is one reason sovereign debt deserves much more attention than the headline debt number alone might suggest.

Confidence: The Invisible Foundation of Sovereign Debt

Governments do not normally experience financial distress in exactly the same way as corporations.

Their borrowing capacity depends on several factors: economic growth, tax revenues, monetary arrangements, debt maturity, the currency in which they borrow and—perhaps most importantly—investor confidence.

Investors buy government bonds because they expect governments to honour their obligations and maintain policies consistent with long-term fiscal stability.

If those expectations weaken, borrowing costs can rise surprisingly quickly.

Investors may demand higher yields to compensate for perceived fiscal risk. Those higher yields can then increase government interest costs, making the fiscal outlook itself more difficult.

The BIS has found that shocks to perceptions of fiscal sustainability can affect not only sovereign bond yields but also exchange rates, equity markets, inflation and economic output.

The danger is therefore not simply that a government has a high debt-to-GDP ratio.

It is that markets may suddenly reassess whether the country's fiscal trajectory remains credible.

Confidence can take years to establish and considerably less time to damage.

We Have Already Seen How Sovereign-Bond Stress Can Spread

The possibility is not merely theoretical.

In September 2022, the United Kingdom experienced severe turmoil in its government bond—or gilt—market after a sharp repricing of UK assets exposed vulnerabilities in leveraged liability-driven investment funds used by pension schemes.

Forced selling threatened to create a self-reinforcing decline in long-dated gilt prices.

The Bank of England responded with temporary and targeted government-bond purchases to restore orderly market functioning and give affected funds time to reduce their vulnerabilities.

The episode did not become a sovereign debt crisis.

But it demonstrated something important: instability originating in a government bond market can quickly interact with leverage and liquidity pressures elsewhere in the financial system.

That lesson is particularly relevant today because sovereign bond markets increasingly involve institutions outside the traditional banking sector.

Why the Next Crisis Could Look Different From 2008

The 2008 crisis originated primarily in private credit markets, particularly mortgages, securitisation and highly leveraged banking institutions.

Since then, international banking reforms have strengthened capital and liquidity requirements.

That does not mean banks are immune from future crises.

It means financial vulnerabilities have also migrated.

The BIS reports that non-bank financial institutions—including asset managers, investment funds, insurers, pension funds and hedge funds—now play a major role in sovereign debt markets. In advanced economies, their share of sovereign debt holdings increased from approximately 44% in 2021 to 53% in 2025.

Many of these institutions are long-term investors that contribute positively to market depth.

But some market participants employ substantial leverage or depend heavily on short-term funding.

During periods of stress, margin calls, redemptions or forced deleveraging can cause institutions to sell assets simultaneously, potentially turning an ordinary market correction into a liquidity crisis.

Further Reading: When Missiles Meet Markets: Could a Prolonged U.S.–Iran Conflict Trigger the Next Global Economic Crisis?

The next financial crisis may therefore involve banks, governments and non-bank financial institutions simultaneously rather than fitting neatly into a single category.

The Central Bank Dilemma

Sovereign bond-market instability creates a particularly difficult problem for central banks.

If markets become disorderly, a central bank may temporarily intervene to restore liquidity or prevent destabilising fire-sale dynamics.

But financial-stability interventions must be distinguished from permanently financing government deficits.

The BIS argues that any central-bank backstop intended to address market dysfunction should ideally be temporary, targeted and reversible, while sustainable public finances remain the responsibility of fiscal authorities.

This distinction becomes especially important when inflation is already elevated.

A central bank may simultaneously need to maintain restrictive monetary policy to control inflation while intervening in a particular market to preserve financial stability.

The Bank of England faced precisely this tension during the 2022 gilt-market episode: it temporarily purchased long-dated government bonds for financial-stability purposes while keeping the broader direction of monetary policy focused on inflation.

The dilemma illustrates why high sovereign debt can complicate the traditional separation between fiscal policy, monetary policy and financial stability.

Why Emerging Economies Could Face Severe Spillovers

A major sovereign bond shock in an advanced economy would not necessarily remain there.

Global finance is highly interconnected.

During periods of severe uncertainty, investors often reduce exposure to riskier assets. The result can include capital outflows from emerging markets, currency depreciation, tighter financing conditions and higher external borrowing costs.

The IMF's 2026 Fiscal Monitor warns that tighter global financial conditions and dollar appreciation can create particularly difficult pressures for emerging and developing economies.

Countries are especially vulnerable when they combine several weaknesses:

High external or foreign-currency debt
Large refinancing requirements
Persistent fiscal deficits
Low foreign-exchange reserves
Weak economic growth
Limited access to international capital markets

Even countries with relatively sound domestic policies can face higher borrowing costs when global investors suddenly become more risk-averse.

This is one of the defining characteristics of modern financial crises:

Risk travels across borders faster than economic fundamentals change.

Can Governments Simply Create Money to Avoid Default?

Countries that borrow primarily in a currency they control generally have greater flexibility than governments dependent on foreign-currency debt.

But monetary sovereignty does not make debt costless.

A government and central bank may technically have greater capacity to ensure payments are made in domestic currency, but excessive monetary financing can generate other forms of instability—including inflation, currency depreciation and loss of policy credibility.

The key distinction is therefore between solvency in nominal terms and economic stability in real terms.

Avoiding a formal default does not necessarily protect citizens from the consequences of inflation or currency weakness.

Persistently high inflation reduces purchasing power, complicates investment decisions and can increase the interest rate investors demand on future government borrowing.

Related Reading: Financial Literacy: Why Understanding Money Matters More Than Ever

Creating money can alter the form a fiscal crisis takes.

It cannot eliminate the underlying economic trade-offs.

The Real Risk May Be Refinancing, Not the Headline Debt Number

Public debate often focuses on the total amount of government debt.

But the maturity structure of that debt can matter just as much.

A country whose debt matures slowly may be relatively insulated from short-term movements in market interest rates.

A government that must refinance large amounts frequently is more exposed to changing investor sentiment.

This is becoming increasingly relevant.

The OECD estimates that around 80% of gross sovereign borrowing in OECD economies in 2025 was associated with refinancing existing debt, rather than purely new borrowing.

At the same time, some governments have shifted toward shorter maturities to avoid expensive long-term borrowing.

That may reduce immediate costs, but it can also increase future refinancing risk.

The central question is therefore not simply:

How much does a government owe?

It is also:

When must it refinance, at what interest rate, in what currency and to which investors?

What Could Actually Trigger a Sovereign-Debt-Led Crisis?

No single debt threshold automatically produces a crisis.

A major disruption would probably require several pressures to interact.

Potential triggers could include a sudden loss of fiscal credibility, unexpectedly high inflation, political instability, large unfunded spending commitments, a geopolitical shock, a failed or weak bond auction, rapid deleveraging by major investors or a sharp reassessment of long-term interest-rate expectations.

The dangerous scenario is one in which these pressures become self-reinforcing.

Fiscal concerns push yields higher.

Higher yields worsen future interest costs.

Bond prices fall.

Leveraged investors face margin calls.

Forced selling reduces liquidity.

Banks and other institutions become more cautious.

Financial conditions tighten across the economy.

At that point, what began as concern about government finances can become a wider financial-stability problem.

This is precisely why regulators increasingly focus not only on sovereign debt sustainability but also on the market structure surrounding that debt.

Looking Beyond the Headlines

Predicting the precise trigger of the next financial crisis is impossible.

History demonstrates that crises emerge from different combinations of leverage, liquidity, economic imbalances, policy mistakes and investor psychology.

But one lesson appears repeatedly:

Risks often accumulate in areas regarded as exceptionally safe.

Government bonds remain indispensable financial assets, and there is no reason to assume that major sovereign debt markets are on the verge of collapse.

Indeed, the OECD reports that markets have so far continued to absorb record sovereign issuance effectively.

That is an important counterpoint.

High debt is a risk factor, not a prediction of crisis.

Whether sovereign debt becomes destabilising will depend on economic growth, debt maturity, inflation, fiscal credibility, market liquidity, investor composition and the ability of governments and central banks to respond to shocks without undermining confidence.

Final Perspective: From Banking Risk to Sovereign Risk?

The global financial system has changed profoundly since 2008.

Stronger bank regulation has reduced some traditional vulnerabilities, but new risks have emerged through government balance sheets, sovereign bond markets and an increasingly interconnected network of non-bank financial institutions.

This does not mean a government-debt crisis is inevitable.

Major economies continue to possess deep capital markets, substantial economic resources and powerful policy tools. Sovereign bond markets have also demonstrated considerable resilience despite record issuance.

Nevertheless, the latest IMF, OECD and BIS assessments point in the same broad direction: public debt is high, interest burdens are rising, refinancing requirements are large and the structure of sovereign bond markets is changing.

That combination deserves attention.

If the Global Financial Crisis taught policymakers how problems inside banks can threaten entire economies, the coming decade may test a different question:

What happens when financial anxiety begins with the assets that the financial system itself treats as safe?

The answer could shape not only the next financial crisis, but the future architecture of global finance.

Key Takeaways

Global public debt remains historically high, while rising interest costs are putting increasing pressure on government finances.
Large refinancing requirements mean older low-cost debt may increasingly have to be replaced with more expensive borrowing.
Government bond markets are deeply connected to banks, pension funds, insurers and other financial institutions, so severe disruption could spread across the financial system.
Emerging economies may be especially vulnerable to spillovers through capital outflows, currency weakness and higher borrowing costs.
High government debt does not make another financial crisis inevitable; fiscal credibility, economic growth, debt structure and resilient institutions remain critical.

Sources & Further Reading

About the Author

Jay Jarwar is the founder and editor of JayJarwar Insights. He writes about artificial intelligence, technology, geopolitics, economics, public policy and emerging global trends, with a focus on explaining complex issues in clear and accessible language.

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