Group 1 - The core viewpoint of the news is that the balance of margin trading has returned to a high of 2 trillion yuan, driven by rational value investment rather than speculative activities, indicating a shift in investor sentiment towards long-term asset allocation [1][3] - The current margin trading expansion shows three significant changes: a diversification of margin trading stocks, with over 3,000 stocks involved, which reduces risk; a shift towards emerging industries like electronics and biomedicine; and an improved investor structure where institutional investors dominate [1][2] - The fundamental driver of this margin trading expansion is the improvement in policy expectations and the optimization of the regulatory environment, which has led to a significant reduction in financing costs and enhanced risk control mechanisms [2] Group 2 - The rational expansion of margin trading is reshaping the market ecology, with a healthy average maintenance guarantee ratio indicating enhanced risk tolerance among investors [2] - The return of margin trading balance to 2 trillion yuan is a milestone, signifying a more rational and mature funding structure in the A-share market, transitioning from speculation to value-driven investment [3] - The current trend indicates that leveraged funds are being used as tools for value discovery and resource allocation, which fundamentally enhances market pricing efficiency and resource allocation functions [3]