Sovereign bond yields reached their highest levels in decades across several of the world’s largest economies this week, as a broad-based sell-off was driven by a convergence of inflation fears, mounting public debt burdens and the prospect of central banks being forced to raise interest rates further. The most symbolic moment of the move came in Japan, where the 10-year government bond yield broke above 3% for the first time since 1996 — but the phenomenon is far from confined to Tokyo.
Japan was the most visible epicentre of what is in reality a global repricing of sovereign risk. In the United States, the 10-year Treasury yield approached 4.79%, its highest level since January of last year. In Germany, the euro zone’s benchmark, the 10-year yield climbed to around 3.34–3.35%, the highest since 2011. In the United Kingdom, yields surged ten basis points, while Australia recorded its sharpest single-session rise in five months. A Bloomberg index aggregating global government bond yields hit 3.72%, the highest since mid-2008 — the eve of the global financial crisis.
Analysts at Deutsche Bank summed up the scale of the move in a note to investors, describing the bond sell-off as ‘a global phenomenon’ rather than an isolated episode in any single country or market.
Three mutually reinforcing forces lie behind the generalised rise in yields. First, a renewed flare-up in the Persian Gulf — after US forces struck an island in the Strait of Hormuz and Iran retaliated with attacks on the United Arab Emirates and Jordan — pushed crude oil prices higher for a second consecutive day, stoking fears of imported inflation across virtually every energy-importing economy.
Second, Federal Reserve Chair Kevin Warsh adopted a more hawkish tone than markets had anticipated in his Jackson Hole address last week, causing the probability priced in by markets of a US rate increase at the September meeting to jump sharply. Because US Treasuries serve as the global benchmark for fixed-income markets, that signal transmitted directly and immediately into sovereign bond yields worldwide.
Third, debt levels across the world’s wealthiest nations show no sign of stabilising in the near term. US public debt has already exceeded $40 trillion, and the bond market faces additional supply pressure from a wave of issuance by major technology companies — the so-called hyperscalers — that have been raising capital aggressively to fund the artificial intelligence investment boom.
The Japanese case illustrates with particular clarity how profoundly the global debt market landscape has shifted. After decades of near-zero interest rates, the benchmark 10-year Japanese government bond yield has more than tripled in just two years, and has nearly doubled since Prime Minister Sanae Takaichi took office last October with a fiscal expansion agenda that more cautious investors regard as risky. The government is preparing a large economic stimulus package alongside a significant increase in defence spending, paired with more modest tax cuts than initially envisaged — a combination feeding concern about the sustainability of Japan’s public finances in a country where the national debt already exceeds 200% of gross domestic product.
The move was not confined to the 10-year maturity. The five-year yield hit an all-time high of 2.26%; the two-year yield reached a 31-year peak of 1.795%; the 20-year bond touched 3.885%, a level last seen in 1996; and the 30-year bond approached a record closing level of 4.18%. The practical fiscal implications are immediate: Japan’s government had constructed its 2026 fiscal-year budget on the assumption of a long-term interest rate of 3%, meaning any sustained move above that threshold translates directly into higher debt-service costs for the state.
Pressure on the Bank of Japan (BoJ) to raise rates is coming from abroad as well as from domestic markets. On the sidelines of the G20 finance ministers’ meeting in Asheville, North Carolina, US Treasury Secretary Scott Bessent reportedly pressed Prime Minister Takaichi and BoJ Governor Kazuo Ueda directly to accelerate the pace of monetary tightening. Having raised its policy rate from 0.5% to 0.75% last December and then to 1% in June, the BoJ convenes on 17–18 September, with markets now pricing an 80–90% probability of a further increase to 1.25% — which would represent a 75-basis-point rise in Japan’s policy rate in the space of just nine months.
For some analysts, the rise in Japanese yields also marks the symbolic end of a prolonged era of artificially suppressed borrowing costs, rather than a worrying anomaly in its own right. The Japanese 10-year bond had not traded at 3% since September 1996 — the last time that level was reached, Bill Clinton was serving his first term as US president. What is surprising markets most, however, is not the level itself but the speed of the move: the yield stood at roughly half its current level only about a year ago, revealing how rapidly investor perceptions of the risk attached to Japanese sovereign debt — for decades regarded as one of the world’s safest and most stable assets — have changed.
The move also represents a broader test of how international markets assess sovereign credit risk more generally. If even a government bond market as historically stable as Japan’s can experience such a sharp and rapid repricing of its benchmark yields, the pressure on investors globally to reassess the risks associated with sovereign debt issued by other large economies becomes more acute.
Many of those economies face a combination of circumstances strikingly similar to Japan’s: persistent inflation, elevated fiscal deficits and central banks under pressure to tighten monetary policy — even as rising borrowing costs themselves aggravate the fiscal position they are being deployed to address.
The simultaneous nature of the sell-off across the United States, the euro zone, the United Kingdom, Australia and Japan underscores the degree to which global fixed-income markets have become interconnected, and the extent to which a shift in the interest-rate outlook for any one of the major reserve-currency economies can propagate rapidly across the rest of the world’s sovereign debt markets.
Source: Mercado / Original article: https://mercado.co.ao/taxas-de-juro-das-obrigacoes-disparam-para-maximos-de-decadas-em-todo-o-mundo/
