英伟达市值一夜蒸发超1.4万亿元！黄金收涨、原油跌超1%；鲍威尔发表重要讲话；美联储，降息大消息

Market Performance - On October 14, US stock indices closed mixed, with the Dow Jones up 0.44%, the Nasdaq down 0.76%, and the S&P 500 down 0.16% [1] - Major tech stocks mostly declined, with Broadcom down over 3%, and Tesla and Amazon down over 1% [1] - Semiconductor and cryptocurrency stocks saw significant declines, with Intel down over 4%, Strategy and Coinbase down over 4%, and Micron Technology and Arm down over 2% [1] - The rare earth, airline services, and infrastructure operation sectors saw gains, with JetBlue Airways up nearly 8%, Caterpillar and Delta Air Lines up over 4%, and American Airlines up over 3% [1] - Walmart's stock rose 5%, reaching a record closing high [1] Nvidia Performance - Nvidia's stock price was reported at $180.03, down 4.40%, resulting in a market value loss of $20.14 billion (approximately 143.78 billion RMB) [2] Chinese Stocks - The Nasdaq Golden Dragon China Index fell 1.95%, with popular Chinese stocks generally declining, including NIO down over 5%, Baidu down over 4%, and Bilibili down over 3% [4] Commodity Prices - FTSE A50 futures rose 0.38%, closing at 14,779 points [5] - COMEX gold futures increased by 0.64%, priced at $4,159.6 per ounce, while COMEX silver futures decreased by 0.17%, priced at $50.345 per ounce [5] - WTI crude oil futures fell by 1.33%, closing at $58.70 per barrel, and Brent crude oil futures dropped by 1.47%, closing at $62.39 per barrel [5] Federal Reserve Insights - Federal Reserve Chairman Jerome Powell indicated a potential for interest rate cuts this month, citing a deteriorating labor market despite the government shutdown affecting economic assessments [7] - Powell noted that economic growth might be slightly more robust than expected, with the unemployment rate remaining low and wage growth slowing significantly [7] - Powell suggested that the Fed may halt its balance sheet reduction in the coming months [7] - Fed Governor Bowman expressed expectations for two more rate cuts by the end of the year [10] - John Williams, President of the New York Fed, highlighted concerns over the labor market's gradual cooling, although he did not foresee an imminent recession [10] - Williams estimated that tariffs have raised inflation by 0.25 to 0.5 percentage points, but he noted that the overall inflation risk has stabilized [11]