DKNG - NCLH DKNG among premarket losers June, 17 2020 08:18 AM DraftKings Inc. Chembio Diagnostics (NASDAQ:CEMI) -60% after FDA yanks emergency use authorization of COVID-19 blood test.More news on: Chembio Diagnostics, Inc., BioCardia, Inc., Beasley Broadcast Group, Inc., Stocks on the move, , Read more ...