FILE PHOTO: Traders work on the floor at the New York Stock Exchange (NYSE) in New York, U.S., August 2, 2019. REUTERS/Brendan McDermid (Reuters) - U.S. stocks opened lower on Monday, extending a sell-off from last week, weighed down by a drop in technology shares and as China’s yuan hit its lowest in more than a decade on escalating U.S.-China trade concerns. DJI fell 225.78 points, or 0.85%, at the open to 26,259.23. SPX opened lower by 33.98 points, or 1.16%, at 2,898.07.