According to CoinMeta, the Nasdaq 100 index lost $4 trillion in market value over 25 days, and in October, AI stocks fell by more than 13%. Excluding AI stocks, the S&P 500 index rose by 8% during the same period and reached a record high. Currently, the S&P 500 index is only 3.5% away from its historical high, but 58% of its constituent stocks have fallen by at least 20% from their respective highs, and 75% of tech stocks have entered a bear market. In the information technology sector, 91% of stocks have fallen by at least 10% from their highs. the, kobeissi, and letter believe that selling pressure is concentrated on tech-related stocks, and they expect the market to continue to face significant volatility in November.