US #stocks tumble as US #crudeoil prices turn negative @FinancialTimes @MarketWatch @WSJmarkets @WSJbusiness @ReutersBiz @Reuters @business @markets @washingtonpost @nytimes @AP @BBC @CNBC @CNN @MSNBC @thehill @thetimes @latimes @HoustonChron @Suntimes  https://t.co/YTESaxzk2R