美股高开高走，道指拉升775点，英伟达大涨5%，亚马逊一度大跌10%，蔚来涨9%；金银飙升，银价突破75美元｜美股开盘

Group 1 - The US stock market indices experienced a collective rise, with the Dow Jones increasing by 775 points, a 1.59% gain, while the Nasdaq and S&P 500 rose by 0.62% and 0.92% respectively [1] - Nvidia saw a significant increase of 5% in its stock price, while Amazon initially dropped by 10% but later reduced its loss to 8% [1][2] - Amazon's CEO, Andy Jassy, announced a capital expenditure plan of approximately $200 billion for 2026, which has raised concerns among Wall Street investors due to its aggressive nature [2] Group 2 - The Nasdaq China Golden Dragon Index rose by 1.5%, with notable increases in several Chinese companies, including NIO up by 9%, Li Auto up by 5%, and XPeng up by 3% [4] - The index reached 7645.14, reflecting a 1.54% increase [5] - Precious metals saw significant gains, with spot gold rising over 3% to $4928 per ounce, and spot silver initially surpassing $76 before settling at a 6.6% increase to $75.6 per ounce [5]