Don Benjamin's strategy to prevent insider trading involves which approach?

The correct approach to preventing insider trading, as noted, is the firewall strategy. This strategy essentially involves creating barriers within a company to prevent the flow of non-public, material information to those who could misuse it for trading purposes. By establishing these barriers, a company can better control the dissemination of sensitive information and ensure that employees who have access to material information do not share it with others who might engage in trading based on that information.

The firewall approach is significant because it helps maintain market integrity and builds trust in the financial system by minimizing the chances of insider trading violations. Companies implement this by conducting employee training, restricting access to confidential information, and being vigilant about compliance with regulations.

Other options such as a legal list, prohibition of trades, or adhering to specific rules like the Wall Street Rule may have their own applications in different contexts, but they do not specifically encompass the comprehensive framework that the firewall technique offers to safeguard against insider trading.