Reuters Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017,U.S. stock-index futures looked set to add to losses on Thursday as tensions between the U.S. and North Korea remained elevated. Dow Jones Industrial Average futures YMU7, -0.33% fell 48 points, or 0.2%, to 21,970, while S&P 500 futures ESU7, -0.48% dropped 9.50 points, or 0.4%, to 2,463.50. Tech stocks were indicating bigger losses, as Nasdaq-100 futuresNQU7, -0.67% slid 36.50 points, or 0.6%, to 5,886. “Traders would require nerves of steel to start buying into the stock market now, given standoff between the U.S. and North Korea,” David Madden, market analyst at CMC Markets U.K., said in a note to clients.via