整理：4月8日欧盘美盘重要新闻汇总

Domestic News - The National Social Security Fund has actively increased its holdings in domestic stocks and plans to continue this trend in the near future [1] - The Shanghai Stock Exchange held a symposium for securities firms, expressing confidence in the development prospects of the Chinese capital market [3] - China Chengtong plans to use stock buybacks to increase its re-loan funds by 100 billion yuan for purchasing shares of listed companies [3] - The Shanghai State-owned Assets Supervision and Administration Commission is guiding enterprises and listed companies to effectively utilize market value management tools to respond to market concerns [3] - A meeting was held in Zhejiang Province regarding stock buybacks by state-owned listed companies, emphasizing the importance of maintaining a stable capital market [3] - Three major state-owned platforms in Shanghai expressed strong confidence in the Chinese capital market and committed to maintaining its stability [3] International News - U.S. President Trump and Defense Secretary Esper have committed to proposing a $1 trillion defense budget, setting a record for military spending [2] - Indonesia's Finance Minister announced a reduction in import tariffs on U.S. steel, minerals, and IT products from 5-10% to 0-5%, and on electronics, mobile phones, and laptops from 2.5% to 0.5% [2] - The U.S. Customs and Border Protection reiterated that specific tariff rates will take effect on April 9 at 12:01 AM [2] - The White House Press Secretary stated that President Trump will sign an executive order regarding coal at 3 PM local time [2] - The World Gold Council reported that a stronger euro, tariff concerns, and ETF buying drove gold prices to a new high in March [2]