Group 1 - The core idea emphasizes the importance of foundational knowledge in investment and fund selection, suggesting that a solid understanding of investment funds is crucial for successful investing [2] - The article introduces the concept of margin money market funds, which are designed as cash management tools for idle funds in securities accounts, highlighting their high safety and liquidity features [3] Group 2 - The content encourages readers to engage with a dedicated section on foundational knowledge, indicating a resource for further learning [7]