英伟达市值一夜蒸发1.4万亿元预测2025年全球经济增长率为3.2%，较7月份的预测值上调0.2个百分点；2026年全球经济增长率为3.1%，与7月份的预测值持平。

Group 1 - Nvidia's market value dropped by approximately $20.14 billion (about 1.4378 trillion RMB) overnight, with its stock price falling over 4% [2] - Major technology stocks, including Nvidia and Intel, experienced declines, contributing to a mixed performance in the U.S. stock indices [2] - The Nasdaq China Golden Dragon Index fell by 1.95%, with notable declines in popular stocks such as NIO and Baidu, which dropped over 5% and 4% respectively [4][6] Group 2 - Federal Reserve Chairman Jerome Powell reiterated that monetary policy decisions will be made based on evolving economic conditions rather than a predetermined path [6] - The International Monetary Fund (IMF) revised its global economic growth forecast for 2025 to 3.2%, an increase of 0.2 percentage points from July's prediction, while maintaining the 2026 growth rate at 3.1% [6] - Market expectations indicate a 97.3% probability of a 25 basis point rate cut by the Federal Reserve in October, following a previous cut announced on September 17 [7]