According to CoinMeta, U.S. stock index futures rose again due to NVIDIA's financial report, with the S&P 500 futures increasing by 0.5% and Nasdaq futures rising by 0.9%. NVIDIA performed exceptionally well in its second-quarter financial report, and its stock price soared by more than 5% in after-hours trading. The overall market sentiment has fueled a AI craze, affecting other chip manufacturers and the semiconductor industry. NVIDIA expects to generate approximately $400 billion in revenue this year and predicts a 70% increase in revenue next year. Despite facing challenges of memory shortages, NVIDIA still maintains a profit margin of nearly 75%. The market is watching the upcoming speech by Federal Reserve Chairman Powell at Jackson Hole, which could influence market sentiment.