The financial markets are facing multiple uncertainties. Some analyses suggest that if the Fed chairman resigns, it could trigger a market pump. However, the tariff policy set to take effect on August 1 may lead to a market fall. Historical data shows that the period from late July to early August is usually a time of higher risk. In this complex market environment, investors need to maintain a cautious attitude and closely follow various economic indicators and policy changes. It is recommended that investors comprehensively consider these factors when making investment decisions, appropriately diversify risks, and be ready to adjust their portfolios at any time. In the face of potential market fluctuations, it is particularly important to remain calm and rational.