本周标普500指数下跌近2%，尽管周五有所反弹，但11月以来累计跌幅仍达3.5%。科技股权重较大的纳斯达克综合指数11月已下滑超过6%，并创下了 自4月以来的最大三周跌幅。 AI泡沫破裂的担忧、经济放缓的忧虑、以及投资者获利了结的压力，这些因素在市场中相互交织，导致美股本周出现数月来最剧烈的波动。"谁也没想到 会这样"，投资者对未来可能出现的更大波动感到担忧。 （美股基准股指本周走势） 动量股本周遭受重挫，Robinhood本月市值蒸发约四分之一，Coinbase股价暴跌30%，Palantir下跌约23%。高盛的一篮子高贝塔动量股较昨日高点暴 跌近15%。这是自2022年11月以来动量表现最差的一周。 AI泡沫破裂的担忧、经济放缓的预期以及获利回吐的压力正在市场上交织碰撞，导致本周美股出现数月来最剧烈的盘中波动。"谁也没想到会这样"，投 资者对未来可能出现的更大波动感到担忧。 （高盛高贝塔组合较昨日高点暴跌14.7%） 对人工智能公司押下重注的投资者焦虑最为严重。追踪AI股票的Global X人工智能与科技ETF本月下跌约10%，而追踪科技七巨头的ETF自10月底以来 下跌约6.6%。 英伟达业绩引发的意外 ...

Market Overview - Concerns over the AI bubble, expectations of economic slowdown, and profit-taking pressures have led to significant volatility in the U.S. stock market, with the S&P 500 index dropping nearly 2% this week and a cumulative decline of 3.5% since November [1] - The Nasdaq Composite index, heavily weighted with tech stocks, has fallen over 6% in November, marking its largest three-week drop since April [1] Stock Performance - Momentum stocks have faced severe declines, with Robinhood's market value evaporating by approximately 25% this month, Coinbase's stock plummeting by 30%, and Palantir down about 23% [3] - Goldman Sachs' basket of high-beta momentum stocks has dropped nearly 15% from its recent peak, marking the worst week for momentum performance since November 2022 [3][5] AI Sector Impact - Investors are particularly anxious about companies heavily invested in AI, with the Global X Artificial Intelligence & Technology ETF down about 10% this month and an ETF tracking the "Big Seven" tech companies declining approximately 6.6% since the end of October [5] - Nvidia's earnings report, initially expected to boost the market, resulted in a significant sell-off, with the stock opening up 5% but closing down nearly 3%, dragging the S&P 500 index down about 3% [5][6] Private Credit and Crypto Market - The private credit market is gaining attention, with concerns arising from the sudden collapse of First Brands, highlighting the risks associated with companies borrowing excessively at low rates [6] - Bitcoin's price fell to around $80,553, down over 30% from its all-time high of $126,000 in early October, raising questions about the broader impact of the crypto market on the stock market and economy [8] Market Dynamics - The volatility is attributed to leverage and profit-taking ahead of year-end, with brokerage account financing reaching a historic high of $1.1 trillion by the end of October [10] - Over-leveraged market participants are selling tech stocks to cover losses in crypto positions, exacerbating market declines [10] - Despite the volatility, some analysts believe the market remains relatively calm, with the S&P 500 index only 4.2% below its all-time high, indicating that many investors are still observing rather than panicking [12]