美股科技股大跌，英伟达跌超3%，黄金涨破3340美元

Market Overview - US stock indices experienced a decline, with the Dow Jones down 0.23%, S&P 500 down 0.84%, and Nasdaq Composite dropping 1.51% [1] - Major tech stocks fell, with the "Magnificent Seven" index down 2%, and Nvidia and Tesla dropping over 3% [1] - Nvidia's market value decreased by over $155 billion following a 3.5% drop on August 19, continuing its decline with a further drop of 3.54% [1] Economic Indicators - The Consumer Price Index (CPI) for July showed a year-on-year increase of 2.7%, maintaining the same growth rate as June, while the core CPI rose to 3.1% from 2.9% in June, exceeding the Federal Reserve's 2% target [3] - The market's expectations for a rate cut by the Federal Reserve have increased following the stable CPI data [3] Investment Sentiment - Wall Street shows mixed views on the future of US stocks, with a prevailing optimistic sentiment as several financial institutions raised their year-end targets for the S&P 500 index [5] - Citigroup raised its target from 6300 to 6600, while UBS increased its target from 5500 to 6100 [5] - A survey indicated that 45% of fund managers consider "going long on the Magnificent Seven" as the most crowded trade [5] Valuation Concerns - Howard Marks from Oaktree Capital noted that while the average P/E ratio for the Magnificent Seven is about 33, it is justified due to their strong market positions and profitability [6] - In contrast, the average P/E ratio for the remaining S&P 500 companies is 22, significantly above historical averages, raising concerns about overall market valuation [6] Economic Outlook - Stifel warned of a potential downturn, suggesting that the S&P 500 could drop by up to 14% by year-end, potentially closing at 5500 [6] - Morgan Stanley's CIO highlighted mixed signals in economic data, indicating risks from a cooling labor market and rising price pressures [6]