大摩量化警告：动量崩塌、杠杆ETF大量抛售美股 接盘的散户寥寥无几！

Core Viewpoint - Momentum consensus trading experienced a "collapse-like" reversal on February 5, driven by concentrated long position liquidation and passive selling from leveraged ETFs, leading to a rapid amplification of declines, with a notable absence of retail buying support [1][5][7] Group 1: Market Dynamics - The recent decline exhibited a structural characteristic of "index relative restraint, internal market volatility," with selling pressure concentrated in the Nasdaq, technology, and semiconductor sectors, which had previously led the market [1][5] - Goldman Sachs noted that nearly three-quarters of stocks outperformed the S&P 500 during the decline, indicating that the pain points were concentrated in a few crowded momentum trades [2][3] Group 2: Trading Behavior - Morgan Stanley's data showed that the momentum index MSZZMOMO fell approximately 7.7% in a single day, marking an extreme volatility event, primarily driven by long positions [5] - The selling pressure was heavily focused on previously leading sectors such as AI, national security, and Bitcoin mining stocks, while cyclical, chemical, and banking sectors showed relative strength [5] Group 3: Leveraged ETF Impact - Morgan Stanley's quantitative team estimated that leveraged ETF rebalancing contributed approximately $18 billion in selling pressure in the U.S. stock market, significantly impacting the Nasdaq and technology sectors [6] - The risk of continued selling pressure from leveraged ETFs remains, with an estimated $10 billion in potential future sales due to high volatility and historical leverage levels [6] Group 4: Retail Investor Behavior - Retail buying, which typically acts as a buffer during price declines, was notably absent, with net buying intensity at its lowest in the past year [7][9] - Institutional selling was high, further exacerbating the lack of support for consensus long positions during critical moments [7] Group 5: Future Outlook - Morgan Stanley suggests that while a technical rebound may occur, it is advisable to sell into any rebound due to ongoing deleveraging and the absence of retail investors as marginal buyers [10][13] - Historical data indicates that significant declines in the momentum index often lead to negative stock performance in the following 1-2 months, with a median decline of approximately 22% [10][13]