每日钉一下（熊市里坚持下来的投资者能有多少呢？）

Group 1 - The article highlights that most investors are familiar with stock index funds but have limited knowledge about bond index funds, indicating a gap in understanding investment options [1] - It introduces a free course that focuses on investment methods for bond index funds, suggesting an educational opportunity for investors [1] - The article encourages readers to engage with a course assistant to receive additional materials such as course notes and mind maps for efficient learning [2] Group 2 - The article provides a call to action for readers to access a larger family asset allocation course, emphasizing the importance of comprehensive financial education [3]