Stocks fall as stock market rally struggles


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The Dow Jones Industrial Average opened lower Friday, as the stock market headed for a losing week. Meanwhile, Cathie Wood's Ark Invest ETFs sold more than 13,500 shares of Nvidia


stock. Key earnings movers Friday included DocuSign (DOCU), RH (RH), Guidewire Software (GWRE) and Kroger (KR). DOCU stock dropped nearly 1% in morning trade, while RH shares dived more


than…