The sell-off in U.S. Treasury (UST) yields has continued pretty much in an unabated fashion In fact, multi-year high watermarks are being achieved throughout the fixed coupon maturity curve. The most widely followed development was the UST 10-year yield rising to its highest level since 2007.

Interestingly, this soaring rate phenomenon has not been isolated to only the U.S. government bond market as sovereign debt yields have risen in a noteworthy fashion all around the key developed countries. As has been the case in the U.S., a number of foreign government bond yields have also reached multi-decade highs. Here’s some context:

• UST 10-year hit its 19-year high at 5.2% (2007)
• Japanese 10-year JGB hit its 30-year high at 3.06% (1996)
• German 10-year Bund hit its 15-year high at 3.60% (2011)
• UK 10-year Gilt hit its 18-year high at 5.36% (2008)

With these bond yields at their highest levels since the early 2000s, you may be wondering, what exactly happened to the global bond market last week? Let’s break it down.

10-Year Government Bond Yields

Source: Bloomberg, as of 9/27/2026

Overall, three main factors are affecting these major global bond markets. The U.S., Europe and Japan are exposed to:

• Deficit spending
• Inflation concerns
• Central bank tightening

Simply put, deficit spending can stoke inflation and result in central bank rate hikes to counter current and/or future demand pressures. Unfortunately, these factors do not seem as if they are disappearing for quite some time, which ultimately may make those deficits even more expensive to finance.

U.S.

As we have previously written in What’s Driving Treasury Yields Higher?,there are varying factors that are impacting U.S. Treasury Yields. On top of sticky inflation, a resilient economy, the Warsh term premium and crowding out effects, the U.S. government deficit has pushed investors to demand higher yields on longer-dated Treasury bonds. Notably, two of the UST auctions last week showed weak demand, showing perhaps that current yield levels are still not overly enticing for investors.

Japan

After residing in negative territory and then being capped out under 1%, ten-year JGBs have now surpassed the 3% threshold, due to Bank of Japan (BOJ) tightening and dialed-up fiscal spending plans. Japan’s position is of particular importance because it’s historically been one of the world’s largest government debt buyers. However, given rising currency hedging costs and relatively more attractive yields in their own domestic bond market, Japanese life insurers and pension funds may now see more incentive to keep their funds at home.

Germany

Rising energy costs from the Middle East conflict have ignited inflation concerns, driving the European Central Bank (ECB) into rate-hike mode. As a result, Bund yields hit their highest levels since 2011. As we have witnessed here in the U.S., the bund market had not been anticipating ECB rate hikes at all. Now traders are projecting several hikes through 2027.

UK

The 10-year Gilt yield moved closer to multi-year highs, and the market is expecting a 25-basis point rate hike from the Bank of England in November. On top of that, their debt levels are rising close to 95% of GDP, which is triple what it was before the Global Financial Crisis. They are also carrying one of their heaviest debt burdens in more than half a century.

Conclusion

Some market commentary has questioned whether the UST market remains a key source for global investors. The answer is yes. However, with the rise in other sovereign debt market yields, Treasuries do have some potential competition. Rather than foreign investors becoming active sellers of Treasuries, we see the most likely scenario being one of continued foreign buying, but perhaps at a somewhat lesser rate.