中概股上涨，纳斯达克中国金龙指数盘中涨超2%

Group 1 - Federal Reserve Chairman Jerome Powell indicated that a shift in risk balance may require policy adjustments during the Jackson Hole Global Central Bank Conference [1] - Traders increased bets on a potential interest rate cut by the Federal Reserve in September [1] - Major U.S. stock indices experienced collective gains, with the Dow Jones Industrial Average rising by 1.44%, the Nasdaq by 1.40%, and the S&P 500 by 1.21% [1] Group 2 - U.S. tech giants saw collective gains, with the U.S. Tech Seven Index increasing by 1.20% [1] - Tesla surged over 4%, while Google-C, Apple, Amazon, and Meta rose over 1%, and Nvidia and Microsoft also followed suit [1] - Most popular Chinese concept stocks rose, with the Nasdaq Golden Dragon China Index increasing by over 2% [1] Group 3 - NIO's new ES8 model officially opened for pre-sale on August 21, with a starting price of 416,800 yuan for the luxury version and 308,800 yuan for the battery-as-a-service option [1] - The new ES8 is set to officially launch and begin deliveries in late September 2025 [1] Group 4 - Precious metals prices experienced a rapid short-term increase, with London spot gold rising by 0.66% and COMEX gold futures increasing by 0.52% [1]