Lori Calvasina, head of US equity strategy at RBC Capital Markets LLC, said Friday that benchmark Treasury yields reaching five percent [1] would challenge U.S. stock bulls.

This warning highlights a critical tension between the bond market and equity valuations. When government bond yields rise, they often act as a gravity force on stock prices by increasing the cost of borrowing and altering how investors value future earnings.

Calvasina said that the rise in yields to the five percent threshold [1] would specifically put pressure on the bullish outlook for U.S. equities. The mechanism behind this pressure is the compression of price-to-earnings ratios. As the risk-free rate of return offered by Treasuries increases, the relative attractiveness of stocks diminishes unless those stocks can provide significantly higher returns.

Equity valuations become harder to justify when the yield on a benchmark Treasury rises. Investors typically demand a higher equity risk premium to hold stocks over guaranteed government debt, a shift that can lead to a sell-off in high-valuation sectors.

While the U.S. equity market has shown resilience in various economic environments, the five percent mark represents a psychological and mathematical pivot point for strategists. Calvasina said this level would create a significant hurdle for those predicting continued growth in stock prices.

The relationship between Treasury yields and the S&P 500 remains a primary focus for institutional investors. A sustained move toward five percent [1] would likely force a reassessment of fair value across the broader market.

“Benchmark Treasury yields reaching 5% would challenge US stock bulls”

The warning from RBC Capital Markets underscores the inverse relationship between bond yields and equity multiples. If the benchmark Treasury yield hits 5%, it increases the 'discount rate' used to value future corporate cash flows, which mathematically lowers the current price investors are willing to pay for a stock. This creates a ceiling for stock market growth regardless of company performance.