美股散户狂欢背后，华尔街空头本月损失25亿美元

Group 1 - Retail investors are significantly impacting the stock market, particularly in "Meme stocks," leading to substantial losses for short sellers, with a reported loss of $2.5 billion in July alone for the 50 most shorted stocks [1] - The stocks with the highest short interest have seen a record nine consecutive weeks of gains, accumulating a 33% increase during this period, which is significantly higher than the 10% returns of the Russell 3000 and S&P 500 indices [4] - Retail investor confidence is rising, as evidenced by increased net buying of companies like Opendoor Technologies Inc. and Krispy Kreme Inc., along with a rise in trading frequency [4] Group 2 - Analysts suggest that retail enthusiasm may persist despite upcoming key events, including the end of the Trump tariff suspension and the Federal Reserve's monetary policy decision [4] - The combination of retail buying pressure and hedge funds holding positions on both sides of these stocks is likely to increase volatility and potential returns [4] - There are no signs of the retail investor trend slowing down, as stated by Vanda Research's senior vice president [5]