What ratio of debt to equity maximizes the shareholders interests?

The optimal debt-to-equity ratio that maximizes shareholders' interests varies by industry and company circumstances, but a commonly accepted range is between 1:1 and 2:1. This balance allows firms to leverage debt to enhance returns on equity while maintaining enough equity to manage financial risk. Ultimately, the ideal ratio is influenced by factors such as market conditions, interest rates, and the company's growth stage. Regular assessment and adjustment are necessary to align with changing financial landscapes.