S&P 500 flat, trade choppy after Fed rate decision and Nvidia milestone

U.S. stocks traded near flat as the Federal Reserve cut rates to 3.75-4.00% and flagged it will expand its balance sheet ‘at a certain point’. Meanwhile, Nvidia Corporation became the first company to reach a $5 trillion valuation, highlighting the dominance of AI-led tech. Investors are balancing optimism about growth with caution over narrow leadership and elevated valuations. Sectors beyond big tech remain under pressure and breadth remains a concern heading into the earnings season.