Stock market today: Dow, S&P 500, Nasdaq futures plunge as Wall Street weighs US-Iran talks, AI trade

Stock market today: Dow, S&P 500, Nasdaq futures plunge as Wall Street weighs US-Iran talks, AI trade  Yahoo! Finance Canada S&P 500 futures decline after tech sell-off drags down broad market index; South Korea's Kospi falls over 6%: Live updates  CNBC S&P 500, Nasdaq close lower, dragged by Alphabet and megacap tech; focus on Iran  Reuters

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