The U.S. long-term Treasury market has sounded another alarm. On Wednesday, Eastern Time, the U.S. Treasury Department completed a $25 billion auction of 30-year Treasury bonds. The final awarded yield was 5.046%, marking the first time since August 2007 that the coupon rate for such bonds has reached 5%. This highlights that, against a backdrop of resurgent inflation concerns and an expanding fiscal deficit, investors are demanding higher returns to hold ultra-long-term U.S. debt. The auction results were notably weak. The awarded yield for Wednesday's 30-year Treasury was significantly higher than the 4.876% yield from the previous similar auction in April. It also slightly exceeded the secondary market trading level and pre-issuance rate of 5.041% just before the bidding deadline, creating a so-called "tail"—a signal typically viewed by the market as an indicator of weak demand. This marks the second consecutive 30-year Treasury auction by the U.S. Treasury to result in a tail. A financial blog described the outcome of this Treasury auction as "ugly," noting it was "the first 5% 30-year Treasury yield since the quant meltdown of August 2007." It pointed out that, as veteran traders recall, the historic "quant meltdown" of August 2007 not only marked a peak for the S&P 500 at that time but ultimately evolved into a global financial crisis. The bid-to-cover ratio for this auction was 2.303, down from the previous 2.385. This ratio not only fell below the average of 2.43 for the past six auctions but also hit its lowest level since November 2025. However, the internal structural data of the auction was not as dismal. The indirect bidder allotment, which reflects demand from investors outside the U.S., including foreign central banks and institutions, was 66.6%. This is higher than the 64.1% from the previous auction in April and only slightly below the recent average of 66.8%. Direct bidders received 21.74%, while the remaining 11.7% was taken up by primary dealers who serve as backstops for the auction. This auction continued the overall pressure seen in U.S. Treasury issuance this week. Earlier auctions for 3-year and 10-year Treasuries also faced weaker-than-expected demand, indicating that as yields continue to climb, investors' capacity to absorb the large supply of U.S. debt is being tested. What does a return to a 5% coupon for 30-year Treasuries signify? According to U.S. Treasury regulations, if the awarded yield from a Treasury auction falls between 5% and 5.124%, the corresponding bond coupon is set at 5%. This means that Wednesday marked the first time since 2007 that the U.S. Treasury has issued a 30-year bond with a 5% coupon. It has been noted that the last time the U.S. issued a 30-year Treasury with a 5% coupon was on the eve of the global financial crisis and the U.S. economic recession. For nearly two decades since then, the coupon on 30-year Treasuries had never exceeded 4.75%. During the peak of the COVID-19 pandemic, Treasury yields fell to historic lows. In May 2020, a 30-year Treasury issued by the U.S. Treasury carried a coupon of just 1.25%. Following the Federal Reserve's aggressive interest rate hikes since then, the price of that 30-year bond has now fallen to less than 50 cents on the dollar to attract buyers. This reflects the dramatic revaluation in the global bond market over the past few years: - The Federal Reserve has cumulatively raised interest rates by over 500 basis points. - The U.S. fiscal deficit has continued to expand. - Long-term inflation expectations have resurfaced. - Investors are demanding a higher "term premium" for holding long-term Treasuries. While the secondary market yield on 30-year Treasuries has breached 5% multiple times in recent years, including during the Fed's aggressive tightening in October 2023, the key difference this time is that the U.S. Treasury is formally issuing long-term debt at a 5% financing cost. Rising Energy Prices Fuel Expectations of "Higher for Longer" Rates The recent sustained increase in international oil prices is considered one of the significant factors driving long-term bond yields higher again. The market is concerned that escalating tensions in the Middle East and rising energy prices could reignite U.S. inflation, potentially forcing the Federal Reserve to maintain high interest rates for an extended period. Simultaneously, U.S. fiscal financing needs continue to grow rapidly. In recent years, the U.S. Treasury has consistently increased the size of Treasury auctions to fund the widening fiscal deficit. It has been pointed out that when long-term yields first surpassed 5% in 2023, the Treasury's increase in auction sizes was also a key contributing factor. Now, there is growing concern that the U.S. government will need to conduct large-scale financing at high interest rates for years to come, while demand from foreign central banks and long-term capital for U.S. Treasuries has not kept pace. It is worth noting that demand for 20-year Treasuries has been consistently weaker than for 30-year Treasuries in recent years, leading to generally higher yields. Since the U.S. Treasury resumed issuing 20-year bonds in 2020, their yields have mostly been higher than those of 30-year bonds. A 20-year bond issued in May of this year has also reached a 5% coupon level. Soaring Long-Term Yields Trigger Global Asset Repricing The 30-year Treasury yield is regarded as one of the most critical long-term interest rate anchors in global financial markets. Its persistent rise implies: - Further increases in financing costs for U.S. corporations. - Renewed upward pressure on mortgage rates. - Continued valuation pressure on technology and growth stocks. - Further tightening of global financial conditions. Currently, the U.S. 30-year Treasury yield is approaching the high of this cycle, leading the market to reassess whether "higher for longer" interest rates will become the new normal for global markets in the coming years. Some Wall Street institutions believe that a 5% yield on long-term Treasuries is beginning to regain its appeal for allocation. However, other investors worry that if the U.S. fiscal deficit, inflation, and energy prices continue to deteriorate, the long-term bond market may not have truly bottomed out yet.
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