Shares of leading technology companies, including Nvidia, have faced declining valuation multiples amid rising U.S. interest rates, despite the broader stock market reaching new highs this year. Since January, the price-to-earnings (P/E) ratios of many tech stocks have contracted significantly, reflecting a shift in investor sentiment as borrowing costs increase.

The 10-year U.S. Treasury yield recently climbed to its highest level in 24 years, posting the steepest quarterly rise since 1994. This surge in the “risk-free rate” has put pressure on valuations, particularly for growth-oriented and debt-sensitive sectors. Higher yields reduce the appeal of riskier assets like stocks relative to government bonds, prompting investors to demand higher earnings growth to justify current prices.

Bob Doll, chief investment officer at Crossmark Global Investments, noted that the rise in interest rates has already led to a noticeable drop in P/E ratios across the market, slipping about three turns from earlier levels. However, this effect has been somewhat masked by strong corporate earnings results. Overall, while the S&P 500 index has advanced, an equal-weighted version of the benchmark has declined approximately 5 percent since mid-August, with most industry groups experiencing losses. Sectors such as banks and real estate have fallen more than 10 percent during this period.

The recent market rally has heavily depended on gains in large-cap technology subsectors, including software, technology hardware, and semiconductors, which have been buoyed by widespread optimism around artificial intelligence (AI) and upwardly revised earnings forecasts. The S&P 500 currently trades at about 19.3 times projected earnings for the next 12 months, down from around 22.2 times at the start of the year. This decoupling between index levels and valuations coincides with rising Treasury yields, which began accelerating after the U.S. launched strikes on Iran earlier this year.

Despite the higher discount rates, robust earnings performance has helped support equity prices. Alex Chaloff, chief investment officer at Bernstein Private Wealth Management, highlighted the resilience of corporate results, stating that earnings have been “fabulous” even as the 10-year yield climbed by 100 basis points. Nonetheless, he acknowledged that future gains will require companies to exceed increasingly high expectations, especially as the third-quarter corporate earnings season approaches.

Market strategist Mark Hackett of Nationwide Investment Management stressed the fundamental economic principle at play: “Higher interest rates make stocks less valuable.” Recent trading sessions saw both the S&P 500 and Nasdaq Composite retreat from record levels, while the 10-year Treasury yield exhibited volatility, briefly exceeding 5.36 percent before settling near 5.28 percent following a well-received auction of new notes.

Concentration in a handful of mega-cap technology stocks has intensified, with Microsoft, Nvidia, Apple, and Meta Platforms alone contributing over 300 points to the S&P 500’s third-quarter gains, offsetting declines across the rest of the index. This degree of concentration approaches all-time highs and highlights the uneven nature of the market rally. Some analysts caution that such reliance on a few companies adds vulnerability if those stocks falter.

Scott Rubner of Citadel underscored this divergence, noting that “the stock market is not the economy,” and increasingly, the S&P 500 “is not the average stock.” This contrast is evident in the Dow Jones Industrial Average, which has fallen roughly 4.2 percent over the past month amid softness in shares of major industrial and consumer goods companies such as Goldman Sachs, Boeing, Home Depot, Nike, and McDonald’s, while the Nasdaq has gained nearly 4 percent.

Looking ahead, Crossmark’s Bob Doll expects that elevated interest rates will remain a constraint for equity markets, particularly affecting cyclical sectors sensitive to economic changes. He advised that while there may be opportunities for investors with available cash, broad stock gains are unlikely to continue at the pace seen earlier in the year as higher borrowing costs persist.