UnitedHealth, Alibaba, Celsius, Coinbase, Block, Dropbox, Booking: Stocks to watch today

U.S. stocks were down on Friday, with the S&P 500 shedding 1.7%. The Dow Jones Industrial Average lost almost 750 points, or 1.6%, while the Nasdaq dipped 2.2% in New York by the end of the day.

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