Nvidia’s Market Dominance Surpasses 256 S&P 500 Companies Combined
Nvidia Corp. (NVDA) has grown so large that its market capitalization now exceeds the combined value of the smallest 256 companies in the S&P 500. Lance Roberts of Real Investment Advice highlighted this extreme concentration, noting that a single stock now outweighs more than half of the benchmark index’s members. This trend underscores the narrowing market breadth, where only a handful of stocks are driving the overall market performance.
The S&P 500’s rally is increasingly dependent on a few key players. Only 25% of the index’s stocks are trading above their 50-day moving average, a key indicator of short-term trends. In the third quarter, the S&P 500 gained 2.1%, but the equal-weight version of the index fell 2.2%, indicating that most individual stocks lost value while the headline index rose. This pattern continued last week, with the S&P 500 slipping 0.3% while the equal-weight index fell 0.7%.
Large asset managers have warned about record levels of market concentration. Capital Group noted that the 10 largest S&P 500 companies now make up over 39% of the index, surpassing the dot-com peak of March 2000. CIBC Private Wealth described this level as unprecedented, while J.P. Morgan Asset Management observed that technology and communication services now account for 47% of the index, up from 22% in 2014. Some global pension funds are reducing their exposure to U.S. equities due to high valuations and AI-driven concentration risks.
Despite its dominance, Nvidia’s operating income of $197.6 billion over the past 12 months is less than half of the $487.3 billion generated by the 256 smallest S&P 500 companies. Investors are paying about the same for Nvidia as they are for those 256 businesses combined, even though those companies produce significantly more operating profit. Nvidia’s operating margin stands at 65.2%, far higher than the 12.8% margin of the smallest 256 companies. The market’s future now hinges on whether Nvidia can sustain its growth and high margins.