每日钉一下（股债负相关，是啥意思？）

Group 1 - The article discusses the investment journey of many investors starting with index funds and emphasizes the importance of learning investment techniques to achieve good returns [2] - A free course is offered to teach investment strategies for index funds, along with supplementary materials like course notes and mind maps for efficient learning [2] Group 2 - The article explains the concept of negative correlation between stocks and bonds, defining it as a situation where the price movement of one asset inversely affects the other [7] - It highlights that while stocks and bonds typically exhibit a slight negative correlation, this relationship becomes more pronounced during extreme market conditions, such as a bull market for stocks and a bear market for bonds from 2020 to 2021 [8] - A practical approach to utilizing this negative correlation is suggested, which involves allocating investments between stocks and bonds and periodically rebalancing the portfolio based on market conditions [9]