Global bond markets are experiencing their most violent turbulence in decades. The U.S. 10-year Treasury yield climbed to a multi-decade high of 5.36% before falling significantly following a strong auction result; meanwhile, European sovereign debt markets remain under sustained pressure, with French, Italian, and UK government bond yields all rising sharply, and the dark clouds of the bond storm are far from clearing.

On Wednesday, the U.S. Treasury Department successfully completed a $39 billion 10-year note auction at a high yield of 5.3%, the highest level since November 2000, with demand so robust that it caught the market by surprise.

Following the auction results, the 10-year Treasury yield quickly retreated from its intraday high of 5.36% to around 5.27%, while the 30-year Treasury yield also pulled back from a high of 5.73% to 5.66%. The auction stopped through the issuance price by 1.7 basis points, the largest stop-through in over a year, effectively alleviating market fears of another "catastrophic auction."

However, European bond markets across the Atlantic did not benefit in tandem. The French 10-year government bond yield rose to as high as 4.93%, approaching the post-2002 high touched earlier this month; the UK 30-year gilt yield hit an intraday high of 6.04%, a 28-year record. Mounting market skepticism over Europe's fiscal credibility continued to weigh on the euro.

Strong Auction Provides Breathing Room for U.S. Treasuries

The success of this 10-year note auction largely stemmed from investors actively chasing high yields. The 5.3% auction yield was the highest since November 2000, attracting substantial long-term capital seeking to lock in high returns.

Vail Hartman of BMO Capital Markets noted that the participation ratio of primary dealers—the large banks responsible for backstopping bonds not purchased by investors—fell to its lowest level since 2003 in this auction, which precisely reflects the strength of genuine market demand.

Kristina Hooper, Chief Global Market Strategist at Invesco, said, "There were significant concerns that demand for this auction might be weak, and the emergence of strong demand naturally had an impact—this was somewhat of a relief rally." However, she also warned that she remains skeptical about whether this "relief can be sustained."

John Stopford, Head of Multi-Asset Income at Ninety One, argued that if the selloff continues further, bonds will begin to exhibit characteristics of being "clearly undervalued," and described the 30-year Treasury yield approaching 6% as a "rare buying opportunity."

Fed Signals Cap Rebound Potential

Although the auction results boosted short-term sentiment, the Federal Reserve's policy signals make it difficult for expectations of prolonged high interest rates to fade.

The minutes of the Fed's September policy meeting showed that "most participants believed that another increase in the target range for the federal funds rate before the end of the year could be appropriate." The market is now widely betting that the next 25 basis point rate hike will materialize at the December policy meeting.

This backdrop means that even though the auction temporarily stabilized market sentiment, the fundamental drivers behind this bond selloff—including the energy price surge triggered by the Iran war, upward revisions to U.S. economic growth expectations, and massive debt issuance to support the AI boom—have not been eliminated.

European Debt Pressure Persists, France in Focus

In stark contrast to the temporary stabilization of U.S. Treasuries, turbulence in European sovereign debt markets continues to intensify.

The French 10-year government bond yield rose by more than 0.1 percentage point on Wednesday, touching 4.93% at one point, with the France-Germany bond spread widening back to 140 basis points. Concerns over the fiscal outlook of the eurozone's second-largest economy continue to mount. Akshay Singal, Global Head of Short-Term Interest Rate Trading at Citi, stated bluntly: "France may be the first, but it won't be the last."

The UK bond market has been equally affected. The 30-year gilt yield rose to an intraday high of 6.04%, the highest since 1998, before edging back slightly below 6%. Singal added that while the notion of "bond vigilantes" is popular, the essence of the problem lies in "whether there is credible fiscal policy, and that is currently rather scarce globally—this is the fundamental driver of bond markets."

In the foreign exchange market, dragged down by French risks, the euro fell 0.6% against the dollar and touched its lowest level against the pound since mid-2025 during intraday trading. Francesco Pesole, FX strategist at ING, said, "French risks are triggering a new round of euro weakness."

The current turmoil in global bond markets reflects two parallel dynamics: on one hand, historically high yields are attracting some long-term capital to position at elevated levels, providing阶段性 support to the market; on the other hand, the lack of fiscal credibility and continued monetary tightening make it difficult for the systemic pressures in bond markets to be fundamentally alleviated in the short term.