"Bond Market Storm" Sweeps US, Europe, and Japan as Long-Term Yields Approach Multi-Decade Highs

Global sovereign bond markets are experiencing the most intense wave of selling in decades. Under the triple pressure of inflation concerns, fiscal expansion, and structural shrinkage in demand, long-end yields continue to climb, causing government financing costs worldwide to surge abruptly.

The yield on US 30-year Treasury bonds touched 5.33% this week, marking the highest level since 2007. The yield on French government bonds of the same maturity rose to a peak not seen since 2008. German 30-year bond yields returned to 2011 levels, while UK gilts of the same maturity approached 6%. Meanwhile, the yield on Japanese 30-year government bonds climbed to its highest since 1999.

An article by Wallstreetcn noted that the aggregate yield on global government bonds has returned to 2007 levels. Additionally, data compiled by Bloomberg shows that the average yield of the benchmark portfolio for investment-grade sovereign bonds has soared to approximately 4.5%, the highest on record since 2015.

This sell-off is not an isolated event in a single market but is driven by global structural forces: persistent geopolitical turmoil exacerbating supply shocks and inflation risks, lax fiscal discipline among governments, and a systemic contraction in demand from traditional long-term bond buyers. Analysts point out that this means the pricing logic for long-term fixed-income assets is being rewritten; for the Trump administration, soaring financing costs have become a political pressure ahead of the midterm elections.

US Treasury Yields Flash Warning Across the Board, Long End Bears the Brunt

The epicenter of this bond market storm lies at the long end. Since late June, the yield on US 30-year Treasury bonds has cumulatively risen by nearly 40 basis points. It touched 5.33% during trading on Tuesday before slightly retreating to 5.28%, yet it remains near twenty-year highs.

Long-end bonds lead the decline due to their higher sensitivity to risk factors such as inflation. Justin Onuekwusi, Chief Investment Officer at St. James's Place, stated:

"The signal the market is sending is that we expect higher inflation in the future, or at least greater uncertainty, so we demand higher yields to hold long-term bonds."

Skylar Montgomery Koning, a macro strategist at Bloomberg, pointed out a key difference in this structural rise in yields: deficit expansion is occurring against a backdrop where the economy is not significantly weakening.

"Typically, widening deficits accompany economic softening, leading policy rates to fall and providing a buffer for the bond market. However, current pro-cyclical fiscal expansion means the government is increasing borrowing even as interest rates are already high, pushing yields even higher."

Europe and Japan Under Simultaneous Pressure, Financing Costs Hit Multi-Year Highs in Multiple Countries

The European bond market is also struggling to remain unaffected. The yield on French 30-year government bonds rose to its highest level since 2008, as investors focus on political uncertainties stemming from the 2027 budget negotiations and next year's presidential election.

According to Bloomberg, sources familiar with the matter revealed that Germany issued 30-year bonds via syndication on Tuesday at the highest interest rate in 15 years.

In Japan, although absolute yield levels remain lower than in other major markets, the upward momentum of 30-year government bond yields continues to be sustained and strong, rising to the highest level since 1999.

Faced with the sharp rise in long-end financing costs, some countries have begun to adjust their bond issuance strategies, shifting toward shorter-term instruments.

UK authorities have suspended most of their planned long-term bond issuances. However, the room for maneuvering by governments is very limited—in a new environment where decades-long financing costs can no longer be locked in at ultra-low rates, policy options have narrowed significantly.

For the Trump administration, the continued rise in long-term bond yields is not just a market issue but a political hazard. High government financing costs are transmitting to corporate loans and consumer credit, creating significant pressure ahead of the midterm elections.

Interest payments on US public debt continue to be the core driver of the widening budget deficit. Year-to-date, interest expenditures have accumulated to $1.17 trillion, a 15% year-on-year increase, partly due to rising Treasury yields. The annual US deficit is approaching $2 trillion, and the total national debt is nearing the $40 trillion mark.

Chris Iggo, Chief Investment Officer at AXA IM Core and currently at BNP Paribas Asset Management, stated:

"The November elections may bring more policy risks and keep markets highly focused on fiscal issues before the usual budget season. Ideally, no one wants to face rising mortgage rates on the eve of an important election cycle, even if current rates are still below 2023 levels."

The strategy team led by Ed Yardeni at Yardeni Research stated on Tuesday that there is currently no reason to panic about the US bond market, "We haven't pressed the panic button, but we are closely watching to see if the bond vigilantes will."

Dual Imbalance in Supply and Demand Structure, Real Yields Become Main Driver

Notably, although inflation concerns are an important backdrop to this sell-off, long-term breakeven inflation rates in most major markets—a measure of market expectations for future inflation—have remained relatively stable overall. The rise in yields is primarily driven by real yields, which represent the additional return investors demand for holding bonds above inflation compensation.

On the supply side, technology companies are issuing large volumes of long-term bonds to finance AI investments, further exacerbating supply pressure at the long end. A recent example is Alphabet, Google's parent company, deciding to issue bonds worth 5 billion Australian dollars (approximately $3.6 billion) in the Australian bond market for the first time.

On the demand side, traditional long-term bond buyers are systematically exiting. Pension funds and other institutions have historically been a stable source of demand for long-term bonds. However, as defined-benefit pension plans decline and regulatory policies guide more capital flows into equities, this pillar of demand is shaking. Meanwhile, governments are expanding the scale of bond issuance, increasingly relying on private investors who are more sensitive to price to absorb the supply.

The minutes from the Federal Reserve's June meeting showed that officials had discussed changes in the structure of Treasury holders in detail—the holder base is shifting from the "official sector, which is relatively insensitive to price," to "private investors, who are more sensitive to price." This shift may push up term premiums. Anshul Pradhan, Head of US Rates Strategy at Barclays, stated that this change in buyer structure over the past decade has led to an increase of approximately 90 basis points in the term premium for 30-year US Treasuries.

Facing the continuous rise in yields, institutional investors hold divergent views on the market outlook.

Kelsey Berro, a portfolio manager at J.P. Morgan Asset Management, believes that the current repricing offers a potentially attractive entry window for new capital. "We believe value is more evident at the long end, particularly regarding real yields," she said.

However, AXA's Iggo adopted a more cautious stance:

"It is difficult to judge what level yields need to reach to truly improve the total return prospects for long-duration fixed-income assets. The only thing that might change this situation is a sudden deterioration in economic data or some external shock—and the latter seems more likely than the former."