美股三大指数昨晚集体大跌 IBM股价破纪录暴跌超13%

Group 1 - The U.S. stock market experienced a significant decline, with the Dow Jones dropping over 821 points, a decrease of 1.66%, while the Nasdaq fell by 1.13% and the S&P 500 decreased by 1.04% [1] - Major technology stocks such as Microsoft, Amazon, Meta, and Tesla saw notable declines, while Nvidia and Apple, which are set to release earnings this week, experienced gains [1] Group 2 - The AI sector played a crucial role in the market turmoil, particularly after Anthropic announced new programming features for its Claude Code product, raising concerns about IBM's mainframe business, leading to a more than 13% drop in IBM's stock, marking its largest single-day decline in over 25 years [3] - The software sector was heavily impacted, with the software ETF IGV falling nearly 5%, reaching a two-year low [3] - A widely circulated article titled "The Intelligent Crisis of 2028" heightened investor anxiety, suggesting that abundant machine intelligence could compress labor income and trigger demand contraction, negatively affecting the stocks of mentioned companies [3] Group 3 - Goldman Sachs reported that the U.S. stock market is in a phase of "extreme calm in indices, but severe turbulence in individual stocks," indicating a significant divergence [5] - Institutional investors are selling U.S. stocks at the highest rate in four years while simultaneously buying down protection [5] - There is a clear sector differentiation, with funds aggressively selling software and internet stocks while purchasing semiconductor and memory chip stocks [5]