Wall street tumbles on concerns over AI stocks, economy

By Twesha Dikshit and Purvi Agarwal, Reuters Wall Street's main indexes extended losses to a second session, and were set for weekly declines, as concerns about the economy and sky-high valuations in the technology sector soured sentiment. The tech-heavy Nasdaq declined almost 2 percent on Thursday (US Time) after Wall Street executives earlier this week warned a market correction could be on the way. The Dow is set for its steepest weekly loss in four, while the S&P 500 and the Nasdaq are p