道指首次突破50000点，美股芯片股全线大涨，英伟达涨近8%，黄金白银强势反弹

Market Performance - The three major US stock indices closed higher, with the Dow Jones Industrial Average rising by 2.47% to surpass 50,000 points, marking a historical high [1] - The Nasdaq increased by 2.18%, and the S&P 500 rose by 1.97% [1][2] Technology Sector - Semiconductor stocks experienced a significant surge, with the Philadelphia Semiconductor Index rising by 5.7%. Notably, Nvidia's stock increased by nearly 8%, adding $325 billion to its market capitalization [2] - Other semiconductor companies such as AMD and Broadcom also saw gains exceeding 7% [2] Chinese Stocks - The Nasdaq Golden Dragon China Index rose by 3.71%, with notable increases in stocks such as New Oxygen (+13%), Century Internet (+10.67%), and NIO (+7.23%) [3][4] Precious Metals - Precious metals rebounded strongly, with spot gold rising by 3.98% to $4,966 per ounce, and spot silver increasing by nearly 10% to $77.78 per ounce [4][5] Oil Prices - International oil prices saw a slight increase, with New York crude oil rising by 0.33% to $63.5 per barrel, and ICE Brent crude oil increasing by 0.68% to $68.01 per barrel [5] Cryptocurrency Market - The cryptocurrency market experienced a collective surge, with Bitcoin surpassing $70,000, recovering nearly all losses from the previous market crash. Ethereum, Dogecoin, and Solana all rose by over 10% [5][6] Consumer Confidence - The preliminary consumer confidence index for February 2026 in the US was reported at 57.3, showing a slight increase from January's final value of 56.4, but a decrease from February 2025's value of 64.7 [6][7] US-Iran Relations - The US imposed sanctions on multiple entities and individuals related to Iranian oil trade, aiming to curb illegal oil exports from Iran. This follows indirect negotiations between the US and Iran in Oman regarding nuclear discussions [8]