CNBC: Where was the backup system? View Larger Image As trading resumes on the NYSE floor, David Greenberg of Schaeffer Greenberg, and Justin Schack, Rosenblatt Securities, discuss today’s halted trade. WATCH VIDEO » David Douglas Greenberg2020-04-29T08:00:56-04:00April 8th, 2020|Media, News| FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail