Traders work at the trading floor in the New York Stock Exchange

NEW YORK, Aug. 20, 2021 (UNI/Xinhua) -- Traders work at the trading floor in the New York Stock Exchange in New York, the United States, Aug. 19, 2021. The S&P 500 Index closed at 4,405.80 points, up 5.53 points, or 0.13 percent. The Dow Jones Industrial Average closed at 34,894.12 points, down 66.57 points, or 0.19 percent.The Nasdaq Composite Index closed at 14,541.79 points, up 15.88 points, or 0.11 percent.