US stocks today: S&P 500 hits record closing high on AI optimism, Micron joins $1 trillion club

Synopsis US stocks closed mixed with Nasdaq and S&P 500 hitting record levels as AI-driven optimism lifted tech and chip stocks. Micron surged into the $1 trillion club after a strong price target hike. Geopolitical tension from US-Iran strikes pushed oil higher, while investors stayed focused on AI earnings momentum. The S&P 500 hit a ?record closing high on Tuesday, while the tech-heavy Nasdaq notched further gains, as AI-fueled optimism offset concerns over Middle East peace talks, which were compounded by recent U.S. strikes on Iran. Semiconductor stocks, which have surged on AI-driven demand, led gains, with Micron gaining sharply,…