Bitcoin surged to $81265 on Tuesday and then fell back, dropping to $78111 at one point, breaking the $80000 mark. Gold weakened synchronously, with spot gold falling nearly 2% to $4605 per ounce, previously rising to $4697. During the decline of US bond yields, the S&P 500 index rose 0.2%, the NASDAQ index rose 0.5%, and the yield of US 30-year treasury bond bonds fell below 5.2%. The market expects the probability of the Federal Reserve keeping interest rates unchanged in September to be about 61.9%, with a focus on the US July PCE inflation data and Nvidia's financial report.