This foundational lesson establishes the concept of capital structure as the specific mix of long-term financing sources a firm uses to fund its operations and growth. It distinguishes capital structure from the broader financial structure and explains why these decisions are strategically critical for maximising firm value and shareholder wealth.

• Definition of Capital Structure: Capital structure refers to the particular combination of debt and equity used by a company to finance its overall operations and growth. It is the arrangement of capital from different sources so that the long-term funds needed for the business are raised. The primary components are debt capital (loans, bonds, debentures) and equity capital (common stock, preferred stock, retained earnings).

• Capital Structure vs. Financial Structure: While often used interchangeably, these terms have distinct meanings. Capital structure refers specifically to the mix of long-term sources of funds, such as equity shares, preference shares, debentures, and long-term loans. Financial structure is a broader concept that encompasses the entire liabilities and equity side of the balance sheet, including both long-term and short-term financing such as accounts payable and short-term bank loans. In essence, capital structure is a subset of the broader financial structure.

• Strategic Importance: The capital structure decision is one of the most critical in financial management because it directly influences a company’s risk profile, its cost of capital, the returns available to shareholders, and its overall market valuation. A well-designed capital structure can enhance a firm’s value by optimising its cost of capital and maximising returns for shareholders, while an inappropriate structure can increase financial risk, constrain operational flexibility, and threaten long-term viability.

• The Core Goal: Maximising Firm Value: The central objective is the pursuit of an optimal capital structure that maximises the firm’s value, which directly translates to maximising shareholder wealth. This is achieved by identifying the mix of debt and equity that minimises the firm’s Weighted Average Cost of Capital (WACC).