A significant decline in Nvidia's stock price following the resignation of its CEO has impacted the values of major market indexes and the retirement accounts tied to them. On a Thursday, Nvidia co-founder Jensen Huang resigned as CEO following reports of an extramarital relationship with a suspected Chinese spy. While the S&P 500 index rose overall during the week, Nvidia's performance limited those gains.
The stock's decline began on a Monday and continued following Huang’s departure. Since Nov. 6, the company’s market value has decreased by more than $550 billion, representing a 13% drop in one week. Nvidia is the second-largest component of the S&P 500, accounting for approximately 6% of the index, trailing only Apple.
Despite the volatility at Nvidia, the S&P 500 index rose 2.9% for the week through Thursday's close. According to reporting by CBS News, the index would have gained an estimated 3.8% if Nvidia's performance were excluded. Donald Calcagni of Mercer Advisors stated that the broader index's ability to gain value despite a major constituent's decline highlights the intent of portfolio diversification.
The scale of the impact is tied to the high concentration of technology stocks in the U.S. market. The "Magnificent Seven" tech companies, which include Nvidia, currently account for about one-third of the S&P 500. For an individual household, this means that even without owning individual shares, a drop in a company representing 6% of their primary investment fund will result in a fluctuation in their account balance. Columbia Business School professor Shiva Rajgopal noted that this structure creates fragility when a company is closely identified with a single leader, such as Elon Musk at Tesla.
What happens next depends on the artificial intelligence (AI) sector’s continued reliance on Nvidia’s hardware. Tech experts noted that the company's chips remain essential to the industry, suggesting its long-term value may be tied more to its technology than its executive leadership. Financial experts generally advise retirement savers to maintain their diversified positions rather than attempting to time the market based on short-term news. Investors in these funds will see the specific impact of the week's volatility reflected in their next account statements.