U.S. stocks opened with the Dow down 1.1%, the S & P 500 down 2.5% and the Nasdaq down 3%. Technology stocks continued to come under pressure, with Apple (AAPL. O) falling 5% and its market value falling below $3 trillion. Amazon (AMZN. O) fell 6.2%, NVDA (NVDA. O) fell 2.4%. DuPont (DD. N) fell 11.4%. Popular Chinese stocks fell, with many falling between 5% and 10%.