美股上演惊人高台跳水，英伟达财报利好却暴跌3%引发市场恐慌

Core Insights - The U.S. stock market experienced its most severe intraday reversal since April, with all major indices closing down despite strong earnings reports from Nvidia and Walmart [1][3] - Nvidia's third-quarter revenue reached $57 billion, a 62% year-over-year increase, and net profit was $31.9 billion, up 65%, but the stock fell 3.2% after an initial rise [1][5] - Concerns over the sustainability of AI investments and the potential for an AI bubble have resurfaced, impacting market sentiment [3][6] Market Performance - The S&P 500 index initially rose by 1.9% but closed down 1.56%, resulting in a market capitalization loss of over $2.7 trillion [1] - The Nasdaq Composite index fell by 2.15%, marking a 7.9% pullback from its record high on October 29 [1] - Major tech stocks, including Amazon, Tesla, and Microsoft, all saw declines, with the Philadelphia Semiconductor Index dropping 4.77% [2] Economic Indicators - The strong non-farm payroll report for September showed an addition of 119,000 jobs, significantly exceeding the market expectation of 52,000, which reduced the likelihood of a Federal Reserve rate cut in December to below 40% [3][6] - The market is currently experiencing a shift from high-valuation tech stocks to defensive assets, as evidenced by Walmart's stock rising over 6% following strong earnings [4] Investment Trends - Notable investment firms have begun to significantly adjust their tech stock holdings, with Peter Thiel's fund liquidating its Nvidia shares and SoftBank cashing out approximately $5.8 billion in Nvidia stock [5] - Michael Burry disclosed a large short position against Nvidia, indicating a bearish outlook on the stock [6] - Warren Buffett's Berkshire Hathaway initiated a position in Alphabet, valued at $4.3 billion, surprising the market given Buffett's traditional value investment approach [6] Technical Analysis - The liquidity of top buy-sell orders in the S&P 500 has decreased to about $5 million, well below the average of $11 million for the year, making the market more susceptible to volatility [3] - The upcoming expiration of options worth a nominal value of $3.1 trillion on Friday is expected to increase market volatility [7] - Key technical levels are being monitored, with a critical point at 6457 for the S&P 500, where a breach could trigger further selling [7]