Global bond markets are facing growing pressure as governments and major technology companies increase their borrowing, pushing up the cost of raising funds and raising concerns among policymakers and investors.
Bond yields have climbed across several major economies, with markets increasingly demanding higher returns from countries seeking to borrow.
The shift has been driven partly by renewed tensions between the United States and Iran and the continued disruption around the Strait of Hormuz, which have pushed energy prices higher and increased concerns about inflation.
Higher energy costs could keep inflation elevated for longer, strengthening expectations that central banks in major economies may maintain higher interest rates for an extended period.
Markets had previously expected tensions in the Middle East to ease, allowing oil and gas prices to retreat. Those expectations have weakened as the crisis persists.
However, rising borrowing costs are not solely the result of geopolitical tensions.
Governments face growing competition for funds
A bigger structural concern is the increasing demand for borrowing across the global economy.
Governments are competing with some of the world’s largest technology companies, which are turning increasingly to bond markets to finance massive investments in artificial intelligence infrastructure and data centres.
US technology giants, including Google, Amazon and Meta, have already issued more than $219 billion in debt this year.
The figure is significantly above the $93 billion raised by the companies in 2025 and compares with an annual average of less than $40 billion in earlier years.
Some market estimates suggest the major technology companies could raise between $400 billion and $500 billion from bond markets this year.
The scale of the borrowing is increasing competition for available capital, potentially forcing governments to offer higher interest rates to attract investors.
Japan adds to global bond-market pressure
Japan is another major factor in the changing global flow of money.
The country has one of the highest debt burdens relative to economic output among major economies and is also the largest foreign holder of US government debt.
Japan’s central bank kept interest rates near zero for years, but rising inflation has pushed rates higher.
Japanese government bond yields have subsequently climbed to levels not seen in about three decades.
The weaker yen has added another layer of pressure, particularly as investors reassess where to allocate capital globally.
Credibility becomes crucial for governments
The rise in borrowing costs does not necessarily mean investors expect major economies to default on their debts.
Instead, markets are increasingly focused on whether governments have credible plans for managing rising debt and public spending.
Countries seeking to borrow heavily without a clear fiscal strategy can expect to pay more, particularly when investors question the stability or economic direction of their governments.
Economist Mohamed El-Erian has identified the surge in borrowing by technology companies to finance AI investments as an important new factor in the bond market.
Former Goldman Sachs chief economist Lord Jim O’Neill, meanwhile, has pointed to uncertainty surrounding US economic policy and attempts by Washington to influence rising government bond yields.
UK faces its own borrowing challenge
The United Kingdom is also under pressure as higher global yields raise the cost of government borrowing.
Years of political instability, changes in government and economic policy reversals have contributed to a higher risk premium demanded by investors, increasing the cost of financing UK government debt.
Prime Minister Keir Starmer’s government has sought to reassure financial markets through fiscal reforms and measures designed to improve economic stability.
However, difficulties in pushing through proposed welfare reforms have added uncertainty to the government’s fiscal plans.
Despite the pressure, there have been some positive signals from the UK economy, with growth outperforming several major economies in 2026 and consumer confidence showing signs of improvement.
But higher global borrowing costs could make the government’s policy choices more difficult.
Plans involving increased public spending and greater government intervention could require additional borrowing at a time when investors are already demanding higher returns.
Lord O’Neill has argued that the government’s planned 10-year strategy must provide greater clarity on how it intends to control excessive spending.
For governments around the world, the message from bond markets is increasingly clear: borrowing is becoming more expensive, and credible economic and fiscal plans matter more than ever.
As interest rates and bond yields remain elevated, policymakers face increasingly difficult choices between supporting economic growth, funding public programmes and maintaining investor confidence.
