The chip company has surpassed the majority of companies listed on Wall Street, becoming the second-largest entity in the market. Consequently, the impact of its stock fluctuations extends beyond their own operations and directly affects the performance of the S&P 500 and various other stock market indexes, a level of influence only outdone by Apple.

Source: https://www.euronews.com/business/2025/02/25/why-nvidias-earnings-are-important-to-the-entire-us-stock-market