每日钉一下（4大原则，帮你快速掌握价值投资理念）

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 introduces four fundamental principles of value investing that can help individual investors apply investment strategies effectively [4][5] - The first principle states that buying stocks equates to buying companies, necessitating an understanding of the company's operations and profitability, which ultimately influences stock prices [6] - The second principle emphasizes the importance of having a margin of safety, which means purchasing undervalued assets to avoid overpaying [7]