U.S. long-term government bond yields have risen above 5 percent, stirring worries across equity markets. The sharp increase, especially in 30-year Treasury yields, is raising financing costs for corporations and putting downward pressure on company valuations. Experts note that despite ongoing corporate earnings growth, persistent geopolitical tensions and rising energy prices are casting a shadow over market sentiment.
Concerns over stock market valuations
Since the end of March, the S&P 500 index has climbed over 17 percent, posting a gain of more than 8 percent since the start of the year. However, the index now trades at a forward price-to-earnings ratio of 21.3, which far exceeds its historical average of 16. This elevated valuation has become a focal point for investor concern.
The rise in bond yields is squeezing borrowing opportunities for both companies and consumers. As higher interest rates call into question the sustainability of current equity valuations, fears of sudden corrections in the market have intensified.
Peter Tuz, President of Chase Investment Counsel, commented,
“There is genuine concern that inflation will become entrenched in the economy. So far, we see no sign of a reversal, and if this persists, we could see declines in market values.”
Paul Karger of TwinFocus, an advisor to ultra high net worth investors, observed that clients are divided on their strategies. Karger noted a trend of increasing cash, gold, and commodity allocations in portfolios, while retaining positions in large technology firms.
Jack Ablin of Cresset Capital identified geopolitical friction in the region as the most critical factor. He warned that a prolonged disruption in the Strait of Hormuz, even for a few months, could trigger a new wave of inflation.
Strong profitability meets headline geopolitical risks
Despite this uncertain environment, corporate profitability remains robust. In the first quarter, company earnings jumped by about 28 percent year-on-year, marking the steepest increase since late 2021. Growth has been fueled in large part by investments in artificial intelligence infrastructure and data center spending.
Jeremiah Buckley of Janus Henderson remarked,
“Continued investments in artificial intelligence and the resulting increase in productivity growth are starting to bear fruit. This positive momentum could continue through 2027.”
However, some analysts argue that valuations for technology firms—especially those involved with artificial intelligence—have reached notably high levels, raising the prospect of a near-term correction.
Tim Murray of T. Rowe Price said investors have been reluctant to take a negative position. According to Murray, the expectation that tension in the Strait of Hormuz will be resolved quickly has limited the extent of market selloffs.
John Higgins of Capital Economics warned that bond markets are currently pricing in inflation risks more aggressively than equity markets. Matthew Gertken of BCA added that ongoing Iran-related geopolitical tensions could play a decisive role in the market trajectory for the rest of the year.




