Dow set to drop more than 400 points following report of first US coronavirus case of unknown origin
Traders work on the floor at the New York Stock Exchange.
Brendan McDermid | Reuters
U.S. stock futures traded slightly lower on Wednesday night after Microsoft warned it will not meet its revenue guidance for a key business segment, citing the recent global coronavirus outbreak.
President Donald Trump is also scheduled to hold a news conference at 6:30 p.m. to address coronavirus…