关于“AI泡沫”，“中选政治”和“推翻关税”，来自美银Hartnett的判断，他说“顶部是一个过程，而底部是一个瞬间”

Group 1: Market Signals - The market top is forming slowly through three main signals: the credit spread of AI giants has widened from 50 basis points to 80 basis points, indicating a deteriorating financing environment; public dissatisfaction with living costs is leading to political pressure that may result in government price interventions; and the potential overturning of current tariffs by the Supreme Court could weaken inflation expectations and benefit emerging markets [1][3][13]. Group 2: AI Sector Vulnerability - The prosperity and bubble in the AI sector are entering a new phase, with vulnerabilities beginning to show from the credit side. AI giants are facing cash flow issues that are insufficient to support aggressive capital expenditure plans, forcing them to turn to the bond market for financing. In the past seven weeks, these companies have issued up to $120 billion in bonds [4][9]. Group 3: Political and Economic Factors - Political factors are becoming key variables influencing market direction. Recent elections indicate strong voter dissatisfaction with affordability issues, suggesting that the government may intervene directly to control prices, which could negatively impact corporate profit margins [10][12]. - The potential overturning of current tariffs by the Supreme Court could lead to a significant market restructuring, reducing inflation expectations and impacting the government's ability to leverage technology for global influence [13][15]. Group 4: Labor Market and Economic Pressure - The U.S. labor market is showing signs of cooling, reflecting a K-shaped economic pressure. Reports indicate that layoffs have exceeded 1 million this year, the highest since 2020, and the unemployment rate for recent graduates has surged from 4% to 8% [16][18]. - Although these indicators have not yet reached recession standards, structural unemployment driven by AI is accelerating, suggesting that those in the middle of the K-shaped recovery feel poorer rather than wealthier [18][19].