Government bond yields across the UK, Japan, the United States, and Europe rose to multi-year or multi-decade highs in the week ending September 2, 2026, with the UK 30-year gilt yield reaching 5.89% and Japan's 10-year JGB touching 3.000% for the first time since October 1996 [6][8]. The US 10-year Treasury yield reached 4.77%, the 30-year approached 5.3%, Germany's 10-year Bund hit approximately 3.35%, and France's 10-year OAT broke above 4% for the first time since 2008 [7][18][19]. Australia's 10-year yield surpassed 5% at a 15-year high [9].
Strategists and wire reports across multiple regions attribute the selloff primarily to renewed US-Iran military hostilities and the resulting rise in crude prices. Brent moved above $90 per barrel after US strikes on Iranian targets including Larak Island in the Strait of Hormuz, with the strait described as effectively closed [2][5][11]. Deutsche Bank strategist Jim Reid called the bond selloff `La liquidación de bonos ha sido... un fenómeno global` (The bond selloff has been... a global phenomenon) and identified the weekend's Middle East escalation as the main driver [7]. J.P. Morgan Asset Management's Tai Hui said falling inventories and rising winter fuel demand would push inflation upward [10]. Commerzbank's Christoph Rieger said `Der Anstieg ist hauptsächlich auf die Energiepreise zurückzuführen, doch es gibt Hinweise darauf, dass die indirekten Auswirkungen der Energiepreise allmählich zu einem Anstieg der Lebensmittel- und Warenpreise führen` (The increase is mainly due to energy prices, but there are signs that the indirect effects of energy prices are gradually leading to a rise in food and goods prices) [18].
A second framing centers on Federal Reserve Chair Kevin Warsh's hawkish remarks at Jackson Hole, which raised market expectations of a September rate hike to between 60% and 70% probability [2][6][7]. Warsh stated that underlying inflation must move clearly and quickly toward the Fed's 2% target: `ما باید مطمئن باشیم که تورم پایه بهطور روشن و با سرعت کافی به سمت هدف ما حرکت کند. در غیر این صورت هنوز کار داریم` (We must be confident that core inflation is moving clearly and quickly enough toward our target. Otherwise, we still have work to do) [16]. Fed Governor Michael Barr said policymakers should act decisively if inflation appeared not to be moderating sufficiently [11]. Barrenjoey's Andrew Lilley said `Tôi cho rằng phần lớn đợt bán tháo trái phiếu này thực chất bắt nguồn từ việc thị trường đánh giá lại chính sách của Fed` (I think most of this bond selloff essentially stems from the market re-evaluating Fed policy) and forecast at least three rate increases beginning in September [10][25]. Chinese financial analysis framed Warsh's signals as part of an effort to establish a more transparent, rules-based policy framework, describing the approach as short-term negative but long-term positive for equity risk appetite [21].
A third position points to structural growth in sovereign debt issuance and corporate borrowing as the underlying pressure on long-term yields. US federal debt has passed $40 trillion, annual deficits run at approximately $2 trillion or 6% of GDP, and Japanese ministries submitted a record ¥143 trillion budget request under Prime Minister Sanae Takaichi's expansionary fiscal policy [3][8][12]. Oxford Economics' Shigeto Nagai cited growing expectations of rate increases and concerns about fiscal sustainability in major developed economies [10]. Natixis' John Briggs said `Доходности долгосрочных облигаций, как ожидается, будут оставаться высокими, пока власти США не решатся на реформу социальных программ, чтобы сократить бюджетный дефицит` (Long-term bond yields are expected to remain high until US authorities dare to reform social programs to cut the budget deficit) and called Treasury buybacks a drop in the ocean [23]. Corporate bond issuance by AI hyperscalers — Amazon, Microsoft, and Alphabet — totaling approximately $220 billion, is cited as an additional supply-side pressure [3][9][14].
US Treasury Secretary Scott Bessent has publicly downplayed the selloff, stating "I don't think we are in any kind of a dire situation" and arguing that other countries' bonds had seen larger yield increases [12][13]. The Treasury announced expanded bond buyback operations, doubling long-dated repurchases to at least $4 billion per operation starting September 9 [4][6]. Macquarie strategists said a bond-market measure of sovereign-default concern had not risen excessively, suggesting no panic tipping point [12]. Brookings senior fellow Robin Brooks countered that Bessent's intervention and Warsh's inflation focus betrayed rising official concern, saying "You should care because this stuff under the surface is really bubbling" and describing the selloff as COVID-era global stimulus "coming home to roost" [12][13].
Bessent's remarks extended to Japan, where his meeting with Bank of Japan Governor Kazuo Ueda and Finance Minister Satsuki Katayama was read as an explicit US push for the BOJ to tighten monetary policy and support the yen [7][8][26]. The Japan Times reported that Bessent voiced strong support for "decisive" Japanese monetary steps against yen weakness [26]. The dollar briefly topped ¥160, and the yen traded near a 40-year low [1][8][15]. A rare joint US-Japan currency intervention in August to support the yen produced positive spillover for other currencies, including the Mexican peso, which strengthened below 17 per dollar on August 19, though analysts described the effect as largely mechanical and reversible [4][6].
In Japan, the yield surge has direct household consequences. FNN calculated that average households gain ¥82,000 annually from higher deposit rates, but mortgage-holding households lose ¥79,000, and borrowers in their 30s lose approximately ¥210,000 per year [17]. BNP strategist Ryutaro Kimura described `tâm lý gần như cam chịu, pha lẫn bất lực` (a mood of near-resignation mixed with helplessness) as yields continued to rise [10]. In the UK, Deutsche Bank's Sanjay Raja estimated that current gilt yields would cut the chancellor's headroom from £26 billion to £13.8 billion before the October 28 budget, saying "£10bn to me is the floor" [6]. Capital Economics' Neil Shearing called the environment "a perfect storm for the bond markets," with fiscal concerns pushing up long-term yields and energy-price pressure raising short-term rate expectations [6]. Al Jazeera's Arabic-language coverage emphasized that rising borrowing costs pile political pressure onto Trump, UK Prime Minister Andy Burnham, and Takaichi ahead of elections and budget season [15].
For developing economies, S&P Global Ratings analyst Benjamin Young warned that `un niveau d'endettement structurellement élevé et des recettes fiscales faibles continueront de poser des risques majeurs` (structurally high debt levels and weak fiscal revenues will continue to pose major risks), with sovereign external debt service expected to exceed $90 billion this year, led by Egypt [20].
Some major banks argue markets have overreacted. JPMorgan projected only one US rate hike this year, in December, contending that the largest oil supply shocks on record had limited price effects and that no automatic risk premium should be attached to the Iran conflict [24]. UBS expected the Fed to remain on hold through year-end and saw the 10-year Treasury falling to approximately 4.5% by end-2026 [24]. HSBC's Asia chief economist Frederick Neumann drew a parallel to the run-up before the 1997 Asian financial crisis, noting that yields had risen about 80 basis points since February, but argued the present risk was a potential slowdown in US demand for AI investment rather than a repeat of financial contagion [24].
The Bank of Japan's next policy meeting on September 17-18 and the Federal Reserve's September 16 meeting are the immediate focal points for markets [7][26]. The UK chancellor's budget is scheduled for October 28 [6]. CME FedWatch pricing puts the probability of a September Fed rate hike at approximately 66% [7].