Group 1 - The article emphasizes that different regional stock markets do not move in unison, allowing investors to seize more investment opportunities by understanding multiple markets [2] - Global investment can significantly reduce volatility risk, highlighting the benefits of diversifying investments across different markets [2] - A free course is offered to educate investors on how to invest in global stock markets through index funds, aiming to share the long-term gains of global markets [2][3] Group 2 - The article discusses bond funds, noting their yield levels and volatility risks compared to other asset classes [5] - It presents a comparison of the performance of stock funds, bond funds, and money market funds since 2012, indicating that bond funds have more stable returns and lower volatility risks than stock funds [6] - Investors in bond funds should be aware of the risk of significant short-term declines, which can occur if the fund "hits a landmine" [8]