US markets closed lower on Thursday after a turbulent session, with the S&P 500 falling 0.63% to 6,629, ending below the critical 6,650 level amid renewed concerns about credit quality in the regional banking sector. The Dow Jones slipped 0.65% to 45,952, while the tech-heavy Nasdaq declined 0.47% to 22,563. Financials led sectoral declines, with ten of eleven S&P 500 sectors finishing in negative territory. Technology countered the weakness, posting modest gains as semiconductor stocks received a boost from TSMC's strong earnings and bullish AI outlook, with the Philadelphia Semiconductor Index climbing earlier in the week.
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