每日钉一下（投资如种树，安心持有少折腾）

Group 1 - The core viewpoint is that different regional stock markets do not move in unison, and understanding multiple markets allows investors to seize more investment opportunities [1] - Global investment can significantly reduce volatility risk, providing a more stable investment environment [1] Group 2 - A free limited-time course is available that introduces methods for investing in global stock markets through index funds, aiming to share the long-term benefits of global market growth [2] - Interested parties can obtain the course by adding the "Course Assistant" and replying with "Global" to receive additional materials such as course notes and mind maps for efficient learning [3]