大涨！英伟达，重夺第一！

Group 1 - Nvidia has regained its position as the world's most valuable company, with a market capitalization exceeding $3.76 trillion after a 4.33% increase in stock price [5][7]. - The stock price surge is attributed to ongoing trends in artificial intelligence, with predictions from Loop Capital suggesting Nvidia's market value could reach $6 trillion [7]. - Major technology stocks generally saw gains, with Nvidia leading the way, while other sectors like energy and real estate experienced declines [6][8]. Group 2 - The S&P 500 index is nearing historical highs, with a recent peak of 6108.51 points, just under 1% from its all-time intraday record [4]. - The index has risen over 2% this week, driven by easing geopolitical tensions and a ceasefire agreement between Iran and Israel [4]. - The performance of the S&P 500 is mixed, with eight sectors declining and three gaining, indicating a varied market response [6].