UBS Warns U.S. Equities Most Exposed to Rising Bond Yields

U.S. equities are more vulnerable than any other developed market to the recent surge in government bond yields, largely due to stretched valuations in the artificial intelligence sector, analysts at UBS warned in a recent note.

A Growing Disconnect

According to HOLT analyst Michel Lerner, a combination of geopolitical tensions, persistent inflation, and fiscal concerns in highly indebted nations has pushed government bond yields to levels not seen since before the global financial crisis. In contrast, equity valuations have remained demanding, with markets largely shrugging off macroeconomic headwinds to focus on strong corporate cash returns and AI-driven growth.

Lerner cautioned investors that this divergence between soaring bond yields and resilient stock prices may not be sustainable. "History suggests bond vigilante episodes rarely remain contained given the challenges of curbing deficits without weakening growth or fuelling inflation," he wrote in the note to investors.

U.S. Stocks' High Sensitivity

Among highly indebted economies, UBS identified U.S. stocks as being particularly exposed to a potential spillover from the bond market. The report highlights that many companies, especially within the AI value chain, trade at valuations that imply record-high future cash flows. This makes their present value highly sensitive to a rising cost of capital.

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"In effect, this makes the US the longest-duration equity market among developed economies," Lerner explained. Higher yields also increase the hurdle rate for new growth projects, a factor especially relevant to capital-intensive AI infrastructure spending where returns are already being questioned.

Investor Positioning

In a world of higher interest rates, UBS advised investors to prioritize quality and financial strength. The note suggested focusing on companies with:

• Strong economic moats
• Robust balance sheets
• Limited duration risk

Conversely, Lerner recommended caution toward highly valued firms whose capital spending exceeds their internally generated cash flow, as these could be most at risk in the current environment.