Weak data reignited fears of an economic slowdown, and U.S. stocks "opened the door black" in September

On September 4th, new economic data reignited concerns about the health of the economy. U.S. stocks started September poorly and technology stocks collectively tumbled. The Dow fell more than 650 points, or 1.6%, during the session. The S & P 500 index fell more than 2.2%, and the fear index VIX soared 30%. The Nasdaq fell 3.3%, its worst day since the global stock market crash on August 5. Shares of artificial intelligence darling NVIDIA (NVDA. O), which has been on the radar of investors for more than a year, fell more than 9%, leading semiconductor stocks to pressure the stock market. Earlier data showed that the final value of the S & P global manufacturing PMI in the United States fell in August, while the ISM manufacturing index in the United States in August also missed economists' expectations. Larry Tentarelli, chief technology strategist at Blue Chip Trends, said: "The market seems to be very sensitive to any data right now." "We've become a very data-dependent market."