美股，突发！一则警告，骤然来袭！

Core Viewpoint - The risk of a bubble in the U.S. stock market is increasing, as warned by Michael Hartnett, a prominent analyst at Bank of America [1][2] Group 1: Market Conditions - Global policy rates have decreased from 4.8% last year to 4.4%, with expectations of further reduction to 3.9% in the next 12 months [3] - U.S. policymakers are considering regulatory reforms to increase retail investor participation, which could lead to greater liquidity and volatility in the market [4] - Despite higher tariffs, the U.S. stock market has rebounded to historical highs due to optimism about economic growth and corporate profits [4] Group 2: Investor Sentiment - Fund managers are entering risk assets at a record pace, pushing market sentiment to multi-month highs, with a significant increase in allocations to U.S. stocks and technology stocks [6][7] - The proportion of investors believing that the economy will not enter a recession has reversed, indicating a shift in sentiment [7] - Hartnett warns that the current bullish sentiment may signal a potential sell-off, as the cash level held by fund managers has dropped below 4.0%, which is considered a "sell signal" [6][8] Group 3: Market Indicators - Hartnett identifies several indicators of market overheating, including low cash allocation, high expectations for a soft landing, and excessive net stock allocation [8] - Despite the risks, Hartnett does not anticipate a major sell-off this summer, as stock exposure has not reached "extreme" levels [9] - High levels of consensus among investors regarding risk assets and the S&P 500 may create vulnerabilities, as any minor data change could trigger rapid adjustments [9][10]