On August 6, the international oil price fell. The settlement price of the main contract in the U.S. WTI crude oil futures market was $68.28/ barrel, down $0.81 or 1.20%, and the settlement price of the main contract in the Brent crude oil futures market was $70.70/ barrel, down $0.59 or 0.83%. Oil prices fell mainly due to market concerns about the negative impact of delta mutation virus on economic recovery.