刚刚！股债，集体异动！发生了什么？

Group 1 - The bond and stock markets are showing weakness, with significant declines in both sectors observed on December 4 [1][2] - The yield on the 30-year government bond "25超长特别国债06" increased by 2.4 basis points to 2.26%, marking a new high since October 15 [1][2] - A significant number of stocks in the A-share market experienced declines, with over 4000 stocks falling at one point during the trading session [1][2] Group 2 - The primary reasons for the market weakness are related to year-end liquidity expectations and concerns about corporate profit growth [3] - Despite a strong performance in global risk assets, the A-share market is currently underperforming, although there are expectations for a potential upward trend in the medium to long term [3] - The Hong Kong stock market requires new catalysts for a short-term rebound, with potential risks from overseas markets and the impact of U.S. Federal Reserve policies [4]