U.S. stocks closed down 0.99 percent on the Dow, 1.36 percent on the Nasdaq, and 0.95 percent on the S & P 500. The Nasdaq Golden Dragon China index initially closed up 1.3 percent and gained 3.8 percent this week. Amazon (AMZN. O) fell 4 percent, Tesla (TSLA. O) and Google A fell 3.3 percent, and Apple (AAPL. O) fell 2.3 percent. (Jin Ten)