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Stock market today: Wall Street drifts ahead of the Fed's rate decision and Big Tech reports

U.S. stock indexes are drifting on Wednesday, ahead of the Federal Reserve’s upcoming decision on interest rates and after two days of disruption driven by doubts about the artificial-intelligence boom. The S&P 500 was down 0.2% in morning trading on a packed day, which will also include earnings reports from influential companies like Microsoft, Meta Platforms and Tesla after trading closes. Nvidia has been at the center of Wall Street’s action this week after a Chinese upstart, DeepSeek, said it developed a large-language model that can compete with the world’s best without having to use Nvidia’s top chips.