During the Asian morning session on September 1-2, a synchronized selloff swept across major global bond markets. Japan's 10-year government bond yield briefly reached 3%, a level not seen since 1996, while the 2-year yield climbed to 1.81%, marking a 31-year high. The UK's 10-year gilt yield spiked to 5.234% intraday, the highest since June 2008, before closing near 5.15%; the 30-year gilt touched 5.886% during trading, the loftiest since March 1998. Germany's 10-year yield hovered around 3.35%-3.36%, representing the highest point since April 2011. The US 10-year Treasury yield rose to 4.798% intraday, the strongest since January 2025, before trading within a 4.80%-4.81% range; the 30-year stood near 5.27%-5.29%, just a few basis points shy of its August peak. Australia's 10-year yield climbed to approximately 5.20%, reaching a multi-year high, while France's 10-year yield sat around 4.24%. Rising yields translate directly into falling bond prices.

Market participants attribute this selloff to three converging factors: escalating military actions in the Middle East pushing crude oil prices higher, Federal Reserve Chair Kevin Warsh reiterating his determination to curb inflation at the Jackson Hole symposium last Friday, and widening fiscal deficits across major economies demanding higher term premiums on longer-dated debt. Brent crude spiked to roughly $92-$96 per barrel following the military strikes. The one-year inflation swap rate has surged from below 2% to approximately 2.5% over the past two weeks. Eurozone inflation has returned above 3% for August, with markets already pricing in a rate hike from the European Central Bank next week; the probability of a US September rate increase is reportedly pegged at around 68%. These figures reflect derivatives market pricing rather than official central bank decisions.

Yield levels across countries sit at different historical milestones. The US 10-year yield remains below its cyclical high from 2023, but the 30-year is approaching its steepest point since 2007. Japan's break above 3% on the 10-year is being interpreted as a major signal of departure from decades of ultra-loose monetary policy, as higher domestic yields diminish the relative appeal of overseas bonds for Japanese investors. The UK's long-end yields are being pulled higher by both expanding domestic issuance and sticky inflation. Germany, serving as the eurozone benchmark, has seen its 10-year return to 2011 levels, with the 2-year also reaching its highest since July 2024. Frederic Neumann, chief Asia economist at HSBC, points out that rising long-term funding costs across developed markets reflect simultaneous increases in both public and private sector borrowing demand. Stephen Altz, fixed income strategist at Touchstone, notes that capital providers are reclaiming pricing power.

Treasury Secretary Scott Bessent maintains that the US bond market remains "the best-performing market in the world," a view contested by Eric Englander, strategist at Standard Chartered, who counters: "Best does not equal good performance; everyone has deficit problems." Bessent argues that concerns over debt and yields overlook the underlying strength of the US economy itself. So far this year, the 30-year US Treasury yield has closed above 5% on 55 trading days, the most in a single year since 2006, a count based on actual trading days rather than forecasts.

Corporate issuance and mortgage costs are rising in tandem. According to data from the London Stock Exchange Group, Alphabet Inc (NASDAQ: GOOGL), Amazon.com Inc (NASDAQ: AMZN), Meta Platforms Inc (NASDAQ: META), Microsoft Corp (NASDAQ: MSFT), and Oracle Corp (NYSE: ORCL) have collectively issued approximately $220 billion in bonds this year to fund artificial intelligence capital expenditures, more than doubling last year's total. Global corporate bond issuance has reached roughly $4.9 trillion, setting an all-time record. The average rate on a fixed-rate 30-year US mortgage stands at about 6.71%, while the 2-year Treasury yield sits near 4.36%-4.41%, closely aligned with the policy rate path. The Federal Reserve's official constant maturity yield data released on August 31 showed the 10-year at 4.75% and the 30-year at 5.25%, while September 1-2 intraday trading levels have already moved above those closing figures.