U.S. Treasury Yields Rebound, Erasing Earlier Gains in Global Bond Markets

A relief rally in global fixed-income markets proved short-lived on Thursday as a renewed sell-off in U.S. Treasuries pushed American borrowing costs back toward multi-decade highs, overshadowing earlier gains in Asian and European government bonds.

U.S. Yields Resume Climb

Selling pressure re-emerged in the U.S. market, particularly at the long end of the curve. The benchmark 10-year Treasury yield rose to 4.688%, erasing a portion of its overnight decline. The 30-year Treasury yield climbed to 5.23%, moving closer to the 19-year high of 5.337% reached earlier in the week.

Shorter-term debt also came under pressure, with the policy-sensitive 2-year Treasury yield edging up to 4.185%. The move indicates that while the U.S. Treasury's decision to double its long-end bond buybacks to $4 billion daily has helped stabilize market functioning, it has not altered the underlying macroeconomic drivers: persistent inflation risks and a continuous heavy supply of government debt.

A Divergent Picture in Europe and Asia

Earlier in the session, Asian sovereign bonds had rallied, led by a sharp rebound in Japanese Government Bonds (JGBs). The 10-year JGB yield fell significantly to 2.842% from 2.896%, pulling back from a 30-year high set earlier in the week. However, traders remain cautious amid expectations for a Bank of Japan rate hike as soon as September.

European bond markets showed a split performance, with the German yield curve experiencing a bear flattening—a situation where short-term yields rise faster than long-term ones. Key long-term yields retreated from recent highs:

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• The 10-year German Bund yield fell to 3.251%, snapping a four-day rising streak.
• France's 10-year OAT yield also declined after five consecutive days of increases.

In contrast, the rate-sensitive 2-year German Schatz yield rose for a fifth straight day, reflecting strong market expectations for a hawkish European Central Bank. Traders are largely pricing in a 25-basis-point rate hike next month as Eurozone inflation remains near 3%.

Fiscal and Geopolitical Pressures Mount

The underlying anxiety in global bond markets is being fueled by fiscal deficits and geopolitical risk. Official data confirmed that total U.S. federal government debt has surpassed the $40 trillion mark for the first time, intensifying concerns about debt sustainability and forcing investors to demand a higher term premium for holding long-duration bonds.

Meanwhile, energy market risks persist, with Brent crude holding firm above $91 per barrel amid ongoing shipping disruptions in the Strait of Hormuz. Global investors are now looking ahead to the Federal Reserve's annual symposium in Jackson Hole for guidance on how central bankers plan to navigate the challenges of cost-push inflation and volatile sovereign debt markets.