US market today: Wall Street slips as Walmart drags S&P 500 toward fifth straight loss, Jerome Powell speech in focus

US stocks experienced another decline on Thursday, with the S&P 500, Dow, and Nasdaq all posting losses. Walmart's disappointing profit forecast significantly impacted the market. Investors are also reassessing Big Tech valuations amid artificial intelligence enthusiasm. Meanwhile, Coty's quarterly loss surprised Wall Street, while Nordson exceeded expectations.