The yield on the 10-year US Treasury note surpassed 5 percent for the first time since 2023 amid a surge in inflation concerns and rising oil prices, intensifying volatility in global bond markets. The yield briefly reached 5.01 percent in early trading before retreating slightly to 4.95 percent. As bond yields rise when prices fall, this move marks a significant development, with the 5 percent threshold seen by many analysts as a critical marker.

This increase in Treasury yields follows a sharp sell-off in government bonds triggered by geopolitical tensions stemming from the conflict in Iran, combined with ongoing inflationary pressures and expanding public debt. The last sustained period when the 10-year yield remained near or above 5 percent was in the lead-up to the global financial crisis.

Market experts cautioned about the broader impact of rising yields. Jack Ablin, chief investment strategist at Cresset Wealth Advisors, noted that the climb in yields would likely push mortgage rates higher, which have recently approached 6.8 percent, and increase capital costs for businesses, potentially burdening corporate investment. Similarly, Scott Chronert, a US equities strategist at Citi, described the 5 percent level as a “line in the sand” with the potential to disrupt stock markets, highlighting the risk that higher borrowing costs could dampen economic activity, particularly in highly leveraged sectors.

The increase in yields and bond market turbulence have also been influenced by elevated oil prices. Brent crude hit $109.80 a barrel after Saudi Arabia shut a key oil pipeline, before easing to around $107.28. The jump in energy prices added to inflation concerns and sapped investor confidence, contributing to declines in equity markets worldwide. The Nasdaq 100 index, dominated by technology firms, fell by 0.6 percent, following losses in European and Asian markets. Recent calls from major AI companies to slow development in the sector further weighed on tech stocks.

Market observers warned that sustained oil price increases could exacerbate the bond sell-off. Mike Bell, head of market strategy at RBC BlueBay Asset Management, suggested that yields could continue climbing if energy costs rise further.

The Federal Reserve is scheduled to hold a critical policy meeting tomorrow, with futures markets assigning a 91 percent probability to a quarter-point interest rate hike—the first in three years—as officials aim to rein in inflation. While some political figures, including former President Donald Trump, have urged looser monetary policy, investors fear that not raising rates could lead to a loss of control over long-term yields. Brij Khurana, portfolio manager at Wellington Management, emphasized the risk of losing command over the “back end of the curve” if the Fed delays tightening.

Overall, the combination of geopolitical risks, inflation pressures, and robust debt issuance is creating a challenging environment for bond markets, with potential ripple effects across borrowing costs and financial markets globally.