每日钉一下（美股牛熊市，有什么规律和特征？）

Group 1 - The core viewpoint emphasizes that different regional stock markets do not move in unison, allowing investors to seize more investment opportunities [1] - Global investment can significantly reduce volatility risk, highlighting the benefits of diversification across markets [1] - The article promotes a limited-time free course that teaches methods for investing in global stock markets through index funds, aiming to share the long-term benefits of global market growth [1] Group 2 - To access the course, individuals are encouraged to add the "Course Assistant" and reply with "Global" to receive it [2] - Additional resources such as course notes and mind maps are offered to facilitate efficient learning and understanding of the course content [2] - A link is provided for readers to click and access a free family asset allocation course [3]