The U.S. stock market had its worst day in six weeks, with the S&P 500, Nasdaq, and Dow Jones all experiencing significant declines. McDonald’s stock dropped 5% due to an E. Coli outbreak, contributing to the Dow’s fall. Big tech stocks, including Amazon, Meta, Nvidia, Apple, Tesla, Alphabet, and Microsoft, collectively lost $352 billion, dragging down the Nasdaq and S&P 500.