Since March 30, 2026, the S&P 500 index has risen by 23%, with 70% of these gains driven by ten specific stocks. Nvidia remains the primary contributor, accounting for 13% of the total index growth during this period. As of early October 2026, the company's market capitalization reached between $5,8 trillion and $6 trillion.
Nvidia's weight within the S&P 500 hit approximately 8% in September 2026, marking the highest concentration for a single stock in over 50 years. The company added about $1,2 trillion in market value to the index throughout the rally. Year-to-date, Nvidia shares have increased by approximately 28%, while the S&P 500 index grew by 13% to 14%.
The semiconductor sector's representation in the S&P 500 has expanded significantly, rising from roughly 5% in 2020 to approximately 19.7% by mid-2026. Nvidia reported revenue of $96,2 billion for the fiscal second quarter of 2027. Analysts note that the projected growth of about 70% for fiscal 2028 creates high expectations for the company's future performance.
