30-Year US Treasury Yield Hits Highest Level Since 2007

The US bond market continues to experience significant volatility as yields on long-term government bonds reach levels not seen in nearly two decades. At the center of interest is the 30-year bond, whose yield has surged above the 5.2% level — a high since 2007.

The decline in bond prices, which operate in inverse relation to yields, is sharply affecting the entire financial system: from the rise in mortgage costs and corporate financing expenses, through pressure on stock markets, to further burdening the massive deficit of the US government.

The yield on the 30-year bond recorded a jump to 5.24%, trading above the 5% threshold for most of the month, signaling a significant increase in the cost of long-term debt. At the same time, the 10-year yield, a key indicator for mortgage rates, climbed 7 basis points to 4.67%. Conversely, the 2-year yield fell 4 basis points to 4.23%.

The turmoil in the US debt market is driven by three main vectors. First, concerns about oil supply disruptions pushed the price of a barrel of WTI crude oil up by 6.6% to $84.46, while Brent crude crossed the $90 threshold. While price indices showed signs of cooling in June, security escalations and rising fuel prices have brought inflation fears back to center stage.

Second, the US national debt has climbed to a record $38.5 trillion. The government's need to raise massive sums, alongside a wave of corporate bond issuances to finance artificial intelligence (AI) infrastructure, are creating an excess of supply. Consequently, investors are demanding a higher risk premium for lending money over extended periods.

Finally, the continuous rise in yields is reducing the market value of existing bonds in portfolios and shifting demand toward new issuances with higher values.

Market Perspectives

Dominic Pappalardo, chief multi-asset strategist at Morningstar Wealth, explains the direct impact on the corporate sector: "We are definitely approaching the highest levels seen since the global financial crisis. As the yield on the 30-year bond rises, so does the cost of corporate borrowing. CFOs will be forced to pay more to finance operations and investments, which will set a higher bar for new ventures and could slow down merger and acquisition activity."

Pappalardo adds regarding deal structure: "Higher yields could lead to stocks becoming a more significant component in merger deals, as debt becomes too expensive. Private equity funds will be forced to adjust their mix because the cost of issuing debt has become very close to the price of stocks."

Ed Hutchings, head of rates at Aviva Investors, points to the risk of the situation persisting: "The longer bond yields and the economic environment remain at these levels, the greater the pressure on the markets. It seems that inflation has remained at levels uncomfortable for debt investors, reflecting market fears regarding the need for more prolonged tightening."

Impact on the Economy

Soaring bond yields have direct cross-market implications. When investors can obtain a risk-free return of over 5% from government bonds, risky assets, led by tech stocks, lose some of their attractiveness, creating volatility and downward pressure.

The jump in the 10-year yield directly affects mortgage interest rates in the US. Simultaneously, the rise in government debt yields expands the deficit: a 1% increase in the average interest rate of US debt is expected to add about $3.2 trillion to the government's interest payments over the next 10 years.