Traders work at the New York Stock Exchange in New York, the United States, April 2, 2018. U.S. stocks ended lower on Monday, the first trading day in April, as worries about trade issues and a sharp decline in the technology sector weighed on the market. (Xinhua/Wang Ying)

Traders work at the New York Stock Exchange in New York, the United States, April 2, 2018. U.S. stocks ended lower on Monday, the first trading day in April, as worries about trade issues and a sharp decline in the technology sector weighed on the market. (Xinhua/Wang Ying)