美股亮起三大红灯

Group 1 - The core viewpoint of the article highlights the increasing bubble risk in the U.S. stock market due to rising speculative activities and leverage levels, as warned by major investment banks [1][4][12] Group 2 - Goldman Sachs strategists noted that speculative trading activities have reached historical highs, second only to the 2000 internet bubble and the 2021 retail trading frenzy [2][6] - Deutsche Bank pointed out that margin debt has surpassed $1 trillion for the first time, indicating a "heated" level of borrowing to invest in stocks [3][10] - Bank of America reiterated the bubble risk, attributing it to loose monetary policies and relaxed financial regulations, suggesting that increased retail participation leads to greater liquidity and volatility [4][14][16] Group 3 - The speculative trading indicator from Goldman Sachs shows that the proportion of trading in unprofitable stocks and overvalued stocks has increased, with significant activity in major tech companies and firms involved in digital assets [8][7] - Deutsche Bank reported an 18.5% increase in margin debt over two months, marking the fastest pace of leverage since late 1999 or mid-2007 [10][11] - Bank of America forecasts that the global policy interest rate will decrease further, potentially leading to larger market bubbles [14][18]