US stocks rose on Monday as Wall Street extended its record-setting streak, fueled by optimism in Big Tech megacaps. The S&P 500 rose 0.4%, the Nasdaq gained 0.5%, and the Dow added 66 points, with all three indexes closing at fresh highs. Nvidia surged 4% after announcing up to a $100 billion investment in OpenAI, lifting both the S&P 500 and Nasdaq, while Oracle jumped 6.3% following leadership changes and continued AI enthusiasm. Apple shares rose 4.3%, supported by strong demand for the iPhone 17, and Tesla gained 1.9%, reaching 2025 highs as investors anticipated new products and self-driving advancements. In contrast, Kenvue fell 7.5% after President Trump suggested a link between Tylenol use during pregnancy and autism, a claim denied by the company and medical experts. Market participants remain focused on the Federal Reserve after last week’s 25-basis-point rate cut, with officials stressing that inflation control remains a priority over further easing.