Equity
Equity has two principal meanings in economics and finance. In finance, equity refers to ownership interest in an asset or firm, most commonly represented by shares of stock. In economics and public policy, equity refers to fairness or justice in the distribution of income, wealth, and opportunity. Both meanings are central to their respective fields and are frequently encountered in professional and academic writing.
Equity as ownership
In finance, equity is the residual claim on the assets and earnings of a firm after all liabilities have been paid. Shareholders, as owners of equity, are entitled to dividends and to any residual value in liquidation, but they rank behind creditors and are therefore exposed to greater risk. In return, they have limited liability and participate in the firm's growth. The market value of a firm's equity, its market capitalisation, equals the share price times the number of shares outstanding.
Equity financing contrasts with debt financing. Debt carries a contractual obligation to pay interest and principal and gives lenders priority in bankruptcy; equity confers ownership rights and residual returns. Firms choose a mix of debt and equity to balance tax shields, financial distress costs, and control considerations, a decision known as capital structure.
In banking and real estate, equity refers to the difference between the value of an asset and the debt secured against it, such as home equity or a bank's capital. Low equity makes an entity vulnerable to declines in asset values, a dynamic that contributed to the 2008 financial crisis.
Equity as fairness
In economics and public policy, equity concerns the fairness of distributions. Horizontal equity holds that individuals in similar circumstances should be treated similarly. Vertical equity holds that individuals in different circumstances, particularly different levels of income, should be treated differently, with those better able to pay bearing a larger burden. Equity is often contrasted with efficiency, and the trade-off between them is a central theme in welfare economics and public finance.
Distributive justice theories offer different accounts of what equity requires. Utilitarianism seeks to maximise total welfare, often implying some redistribution. Rawlsian justice, associated with John Rawls, prioritises the position of the least advantaged, justifying inequality only if it benefits them. Egalitarian and libertarian perspectives differ on the extent to which redistribution is warranted.
Applications in policy
Equity considerations shape tax and transfer policy, education and health financing, and development strategy. Progressive taxation and social safety nets aim to reduce inequality. Access to public services, such as education and healthcare, is often justified on equity grounds. International development institutions incorporate equity objectives into their programmes, recognising that growth alone may not improve the well-being of the poor.
Measuring equity relies on indicators such as the Gini coefficient, income shares of deciles, and measures of opportunity, including intergenerational mobility. Persistent inequalities have been linked to slower growth, weaker social cohesion, and political instability.
Equity in corporate governance
Equity ownership carries governance rights as well as financial claims. Shareholders typically elect a board of directors, vote on major transactions, and may receive pre-emptive rights to subscribe to new issues. The separation of ownership and control, first analysed by Adolf Berle and Gardiner Means, creates a principal-agent problem in which managers may pursue objectives that differ from those of shareholders. Governance mechanisms, including incentive pay, independent directors, and the market for corporate control, aim to align managerial behaviour with shareholder interests.
Equity markets also perform an information role. Share prices aggregate dispersed views about a firm's prospects and, when markets are efficient, provide signals that guide capital allocation. Information asymmetries between managers and outside investors can lead to adverse selection in equity issuance and to underinvestment, phenomena formalised in the pecking-order theory of financing.
Equity in banking and regulation
Bank equity, or capital, is the cushion that absorbs losses before depositors and other creditors are affected. Regulators require banks to hold minimum capital relative to risk-weighted assets to limit leverage and reduce the probability of failure. Following the 2008 financial crisis, international standards under the Basel framework were strengthened, introducing higher and better-quality capital requirements, a leverage ratio, and countercyclical buffers.
Because bank equity is costly relative to debt, banks have incentives to economise on it, which creates a systemic bias toward excessive leverage. The public safety net, including deposit insurance and central bank liquidity support, can reinforce this bias by insulating creditors from losses, a manifestation of moral hazard. Regulatory capital rules, resolution regimes, and restrictions on dividends and buybacks during stress are designed to counter these incentives.
Equity, distribution and opportunity
The distributional meaning of equity extends beyond income to opportunity. Equality of opportunity holds that individuals should be able to attain outcomes commensurate with their effort and ability, regardless of circumstances of birth. Persistent gaps in educational attainment, health, and access to credit can entrench disadvantage across generations.
Policy instruments to promote equity of opportunity include early childhood education, targeted transfers, progressive taxation, and universal access to basic services. Measuring opportunity relies on intergenerational elasticity estimates and on measures of social mobility. Empirical work suggests that high inequality is often associated with low mobility, a pattern sometimes called the Great Gatsby curve, which has stimulated debate about the design of redistributive and pre-distributive policies.