Key Takeaways An AI chipmaker's stock extended its rally in the wake of a major artificial intelligence deal. Meanwhile, the latest salvo in an escalating competition between credit score providers weighed on one of the industry's big players. The S&P 500 rose 0.6% and the tech-heavy Nasdaq climbed 1.1% to set fresh closing highs, bolstered by gains in the tech sector and minutes from the latest Federal Reserve meeting suggesting the central bank could be on track toward more interest-rate cuts this year. T ...