Nvidia's huge stock rally is still exerting an outsized influence over the S&P 500 index , reinforcing concerns that broader markets could be hurt if the chipmaking giant's fortunes turn. This year's 140% surge in shares of Nvidia,

Nvidia jumped after CEO Jensen Huang flagged strong demand for the company's chips, boosting its market value by more than $200 billion and accounting for 44 percent of the S&P 500's surge that day, data from Nomura showed.

The stock's fall snapped a four-day winning streak.

Nvidia's partners are showing that the AI titan has "strong runway" for at least the next year, one analyst says.

Nvidia's CEO, Jensen Huang, is selling millions of dollars in Nvidia stock he owns. Insiders like Huang follow special SEC rules like 10b5-1 to manage their stock transactions. Despite the selling, Nvidia is in a strong position and poised for continued growth.

Shares of NVIDIA Corp. NVDA rallied 1.92% to $119.14 Thursday, on what proved to be an all-around positive trading session for the stock market, with the S&P 500 Index SPX rising 0.75% to 5,595.76 and the Dow Jones Industrial Average DJIA rising 0.

U.S. elections are shaping up to be a big deal for both politics and the economy. With Election Day coming soon, both parties are ramping up their campaigns, each with policies that could shake up the market.