凌晨，黄金、白银，直线飙升！

Market Performance - The three major U.S. stock indices closed lower, with the Dow Jones Industrial Average down 1.05%, the S&P 500 down 0.43%, and the Nasdaq Composite down 0.92% as of February 27 [1][2]. - The Nasdaq index fell 3.38% in February, while the Dow Jones rose 0.17% and the S&P 500 decreased by 0.87% [2]. Sector Performance - Major technology stocks experienced declines, with the Wande American Technology Seven Giants Index dropping 1.72% [3]. - The Philadelphia Semiconductor Index fell by 1.21%, with notable declines in stocks like NVIDIA, Qualcomm, and AMD [5]. Individual Stock Movements - NVIDIA shares fell over 4%, Apple down 3.28%, Microsoft down 2.25%, and Tesla and Meta also saw declines, while Google and Amazon recorded gains [4]. - In the Chinese concept stocks, Alibaba dropped 2.69%, with JD.com and other popular stocks also declining [6]. Investment Outlook - UBS Group's Chief Global Equity Strategist Andrew Garthwaite downgraded the U.S. stock market investment rating due to rising risks from a weakening dollar, high valuations, and increasing policy uncertainty in Washington [6]. Gold and Silver Prices - Gold prices surged, reaching a high of $5281.327 per ounce, marking a 1.88% increase by the close [9]. - Silver prices also saw a significant rise, with a daily increase of 6.21% [11]. OpenAI Financing - OpenAI completed a record $110 billion financing round at a valuation of $730 billion, with Amazon contributing $50 billion and SoftBank and NVIDIA each investing $30 billion [7].