美股收低，英伟达重挫4.2%，“中国金龙”跌1.81%，金银油大涨

Market Overview - The US stock market closed lower on Friday, with both financial and technology stocks under pressure due to multiple uncertainties including AI disruptions, disappointing inflation data, and rising geopolitical risks [2][3] - The S&P 500 and Nasdaq indices recorded their largest monthly declines in a year, with all three major indices showing significant weekly weakness [2] Index Performance - The Dow Jones Industrial Average fell by 521.28 points, a decline of 1.05%, closing at 48,977.92 points; the S&P 500 dropped by 29.98 points, down 0.43%, closing at 6,878.88 points; the Nasdaq decreased by 210.17 points, a 0.92% drop, closing at 22,668.21 points [2][3] - For the week, the Dow fell 1.31%, marking the largest weekly decline since mid-November last year, while the Nasdaq and S&P 500 dropped by 0.95% and 0.44%, respectively [3] Sector Performance - The technology sector continued to drag down index performance, with Nvidia experiencing a significant drop of 4.2%, following a previous day's decline of 5.5%, indicating investor caution regarding the uncertainty of AI-related capital expenditures and return cycles [3] - Other notable stock movements included Tesla down 1.49%, Microsoft down 2.24%, and Apple down 3.21%, while Google-A, Amazon, and Google-C saw slight increases [3][4] Economic Data - The US Labor Department reported that the Producer Price Index (PPI) for January rose by 0.5% month-over-month, exceeding market expectations of 0.3%, with a year-over-year increase of 2.9%, still above the Federal Reserve's 2% inflation target [5] - Core PPI, excluding volatile food and energy prices, increased by 0.8% month-over-month, significantly higher than the expected 0.3%, and up from 0.6% in December [5] Market Sentiment - Market sentiment remains cautious as higher-than-expected inflation data exacerbates weak sentiment and may delay expectations for a dovish shift from the Federal Reserve this year [6] - Defensive sectors such as consumer staples, healthcare, and utilities showed relative strength, while cyclical growth sectors faced significant pressure [6] Individual Stock Highlights - Netflix shares surged by 13.8% after exiting the Warner Bros. Discovery acquisition battle, gaining investor support [7] - Dell Technologies saw a significant increase of 21.9%, as the company projected that AI-optimized server business revenue would double by fiscal year 2027 and committed to increasing shareholder returns [8] Bond Market - Despite the hot inflation data, the bond market saw buying interest, with the 10-year US Treasury yield falling by 5.5 basis points to 3.962%, marking the first drop below 4% since late November [8]