The tense relations between the United States and China have depressed the atmosphere of the oil market, the negotiation of the new stimulus agreement of the United States has reached an impasse, and the new coronavirus infection cases in the United States and other countries have increased. The market is worried that global fuel demand will fall again and international oil prices will continue to fall. On Friday (August 7), the settlement price of West Texas light oil in September 2020 on the New York Mercantile futures exchange was $41.22, down $0.73, or 1.7%, from the previous trading day, with a trading range of 41.06-42.22; the settlement price of October 2020 Brent crude oil on the Intercontinental Exchange of London was $44.40 per barrel, down $0.69 or 1.5% from the previous trading day, with a trading range of 44.27- $45.30.