What does the term “capital structure” refer to?

Capital structure is a fundamental concept in corporate finance, referring to how a company finances its overall operations and growth by using different sources of funds.

• Mix of debt and equity is the correct answer. The term "capital structure" specifically refers to the proportion of debt (e.g., bonds, loans, debentures) and equity (e.g., common stock, preferred stock, retained earnings) that a company uses to finance its long-term investments and operations. Companies strive to find an optimal mix that minimizes the cost of capital and maximizes firm value.
• Total assets is incorrect because total assets represent what a company owns, not how those assets are financed. While capital structure finances assets, it is not synonymous with the assets themselves.
• Fixed assets only is incorrect. Fixed assets are a component of total assets, but capital structure finances all assets, both fixed and current, and the overall operations of the business.
• Current liabilities is incorrect. Current liabilities are short-term obligations and are part of a company's financing, but capital structure specifically focuses on the long-term mix of debt and equity, not just short-term liabilities.