a trader works on the floor at the new york stock exchange nyse in manhattan new york city us august 20 2021 reutersandrew kelly sept 10 reuters  wall streets main indexes opened higher on friday as signs of an easing in tensions between the united states and china added to recent data that soothed fears of a slowdown in the economic recovery the dow jones industrial average dji rose 7021 points or 020 at the open to 3494959 the sp 500 spx opened higher by 1364 points or 030 at 450692 while the nasdaq composite ixic gained 8466 points or 056 to 1533292 at the opening bell reporting by shreyashi sanyal in bengaluru editing by aditya soni