Poor data once again triggered concerns about economic weakness, U.S. stocks suffered "open door black" on the first trading day of September, the Nasdaq fell 3.2%, the Dow closed down 1.5%, the S & P 500 fell 2.1%, the fear and pleasure index VIX surged 33.2%。Chip stocks weak, Nvidia down 9.53%, market value overnight evaporation of more than 278.9 billion U.S. dollars (about 1986.2 billion yuan)。International oil prices fell more than 4 percent on Tuesday, erasing this year's gains to their lowest level since Dec. 12, 2023.。

The VIX index symbolizes the intense emotions of investor panic and desire to flee during stock market volatility.