Nvidia's impressive stock rally continues to exert a significant influence over the S&P 500 index, showcasing its dominance in the market. Recently, Nvidia's stock surged by 8.2%, which played a crucial role in driving the S&P 500 to its largest intraday upswing in nearly two years, reversing a 1.6% loss to end the day up 1.1% . This trend highlights how Nvidia's performance can sway broader market movements