Group 1 - The core concept of stock leverage is a significant focus for investors, with discussions around margin trading and informal leverage operations [2] - Margin trading is a regulated leverage tool provided by brokers, allowing investors to borrow funds to buy stocks or borrow stocks to sell, with strict regulatory rules in place [3] - Informal leverage operations lack regulation and present higher risks, often involving third-party platforms or private lending without standardized rules [3][5] Group 2 - Understanding the safety bottom line is crucial for both regulated margin trading and personal leverage attempts, as stock leverage can be a double-edged sword [6] - Investors are advised to clearly define their leverage limits, manage risks effectively, and prioritize legal channels for trading [7] - Psychological preparedness for potential market fluctuations and losses is essential, avoiding blind pursuit of high-leverage returns [7]