Economic Capital Explained: Definition, Calculation, and Example

What Is Economic Capital?

Economic capital is a vital measure for financial firms to stay solvent. It evaluates how much capital is required to support a firm’s risk profile. Financial institutions often calculate this internally, using proprietary models to accommodate market and operational risks accurately, providing a realistic view of solvency beyond regulatory constraints.

How Economic Capital Measures Risk and Solvency

Economic capital is used for measuring and reporting market and operational risks across a financial organization. Economic capital uses economic realities, not just accounting or regulatory rules, to measure risk accurately. As a result, economic capital is thought to give a more realistic representation of a firm’s solvency.

Measuring economic capital involves converting risk into the capital needed to support it. The calculations are based on the institution’s financial strength (or credit rating) and expected losses.

Financial strength is the probability of the firm not becoming insolvent over the measurement period and is otherwise known as the confidence level in the statistical calculation. The firm’s expected loss is the anticipated average loss over the measurement period. Expected losses represent the cost of doing business and are usually absorbed by operating profits.

The relationship between the frequency of loss, amount of loss, expected loss, financial strength or confidence level, and economic capital can be seen in the following graph.

Economic capital calculations and risk/reward ratios help identify which business lines best balance risk and reward. Performance measures that utilize economic capital include return on risk-adjusted capital (RORAC), risk-adjusted return on capital (RAROC), and economic value added (EVA). Business units that perform better on measures like these can receive more of the firm’s capital in order to optimize risk. Value-at-risk (VaR) and similar measures are also based on economic capital and are used by financial institutions for risk management.

Practical Example: Assessing Economic Capital in Banking

A bank wants to evaluate the risk profile of its loan portfolio over the next year. Specifically, the bank wants to determine the amount of economic capital needed to absorb a loss approaching the 0.04% mark in the loss distribution corresponding to a 99.96% confidence interval.

The bank finds that a 99.96% confidence interval yields $1 billion in economic capital in excess of the expected (average) loss. If the bank lacks economic capital, it could raise capital or tighten loan underwriting to keep its credit rating. The bank could further break down its loan portfolio in order to evaluate if the risk-reward profile of its mortgage portfolio exceeded its personal loan portfolio.

The Bottom Line

Economic capital is a crucial measure for financial institutions to ensure solvency and manage risk effectively. It reflects the amount of capital needed to withstand potential losses dictated by a company’s risk profile. Unlike regulatory capital, which is set by external requirements, economic capital is internally calculated, often using proprietary models. This measure not only assesses financial strength and expected losses but also helps financial institutions optimize risk/reward ratios through informed decisions about capital allocation and business unit performance. By understanding and utilizing economic capital, organizations can better navigate financial challenges and improve their overall risk management strategies.