Wall St slumps as Trump renews tirade against Feds Powell

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Indexes down: Dow 2.7%, S&P 500 2.8%, Nasdaq 3.15%
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Dow slides over 1,000 points
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Netflix gains after upbeat revenue forecast
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Tesla slips after report of delay in Model Y launch
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FIS jumps after brokerage upgrade
By Lisa Pauline Matt
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