Stock market tumbles at close amid fears of economic slowdown

NBC News’ Christine Romans and CNBC’s Steve Liesman report as markets close and stocks tumble amid a sell-off, with the Dow falling more than 1,000 points. » Subscribe to NBC News: » Watch more NBC video: NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features , , , Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! NBC News App: Breaking News Alerts: Visit : Find NBC News on Facebook: Follow NBC News on Twitter: Follow NBC News on Instagram: #StockMarket #Economy #DowJones