The bond market is currently a "rollercoaster," with the 30-year US Treasury yield reaching over 5.3%, the highest since 2007, the eve of the global financial crisis. This surge reflects increased borrowing costs for the US government and has prompted a recent intervention from the US Treasury, which announced an increase in bond buybacks to stabilize the market. John Authers, a Bloomberg columnist, emphasized the global significance of the 10-year Treasury yield, calling it the closest approximation to a risk-free rate, influencing lending rates worldwide for governments and corporations alike.

Several factors are contributing to this upward pressure on Treasury yields. One significant driver is the robust economy, particularly the substantial capital expenditures (CapEx) for building AI data centers. Companies like Apple, Google, and Amazon are undertaking massive, albeit safe, borrowing to fund these projects, creating competition for capital. This increased corporate demand for loans forces the government to offer higher yields to attract investors, effectively lowering bond prices.

Another major factor is the scale of the US fiscal deficit. While there's no default risk for US government bonds, investors are concerned about inflation, which erodes the value of fixed-income payments. If the government inflates away its debt, bondholders receive less purchasing power. This inflation risk encourages investors to sell their bonds, driving prices down and yields up. The US Treasury's recent buyback announcement, intended to ease pressure on long-dated debt, has added uncertainty for investors, potentially increasing the term premium—the extra compensation demanded for holding government debt.