美股常胜策略突然失效！动量交易遭遇历史性回撤：资金从科技撤离，价值股成新宠

Group 1 - The momentum trading strategy, which has been a consistent approach in the stock market, suddenly failed in the past week, experiencing its second-largest single-day drop since the pandemic in 2020, surpassing declines from previous market sell-offs [1] - The decline in momentum stocks erased all gains for sectors such as storage chips, metals, rare earth mining, and technology application development for the year [1] - The sell-off was part of a broader downturn in the U.S. stock market, primarily triggered by volatility in the software sector, with concerns that AI applications could replace certain companies, leading to a drop of over 20% in that sector [1] Group 2 - Investors noted a significant rise in stock prices for clothing retail, travel companies, and home goods manufacturers, indicating a broad style shift in the market as funds moved from technology stocks to sectors more closely linked to economic recovery [3] - The UBS value stock long-short strategy basket has increased by 20% since last week, while Barclays' value stock relative to growth stock factor index recorded one of its largest excess returns in history on Thursday [3] - Despite the style shift, the significant drop in the technology sector and its high weight in the index has not been offset by the gains from the style switch, with the S&P 500 index down 1.2% on Thursday and a cumulative decline of 0.7% since 2026 [3] Group 3 - Technology stocks have become synonymous with momentum trading, particularly with software companies experiencing significant declines in the recent downturn [4] - Recent earnings reports from major tech companies have heightened market caution, with Google showing steady revenue growth but projecting capital expenditures for 2026 to exceed market expectations, while Qualcomm's revenue outlook appeared weak [4] - The current market exposure to momentum stocks is at the 99th percentile over the past year and has reached the 100th percentile over the past five years, indicating extreme volatility in momentum factors compared to historical levels [4] Group 4 - Goldman Sachs' trading team indicated that for investors considering positioning during the pullback, historical experience suggests that corrections in momentum stocks can present good buying opportunities in the medium term [5] - The team also advised that given the significant prior increase in momentum stocks and the current high levels of holdings, short-term hedging remains a reasonable choice [5]