# Cost of Equity

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## Definition of 'Cost of Equity'

The cost of equity is the minimum return that an investor requires to invest in a company's stock. It is the rate of return that an investor expects to receive from an investment in the company's stock. The cost of equity is used to determine the value of a company's stock and to make investment decisions.

The cost of equity is calculated using the capital asset pricing model (CAPM). The CAPM is a model that determines the expected return of an investment based on its risk. The risk of an investment is determined by its beta, which is a measure of its volatility relative to the market.

The cost of equity is calculated using the following formula:

Cost of equity = Risk-free rate + Beta * (Market risk premium)

The risk-free rate is the return of an investment that is considered to be risk-free, such as a U.S. Treasury bond. The market risk premium is the difference between the return of the market and the risk-free rate. Beta is a measure of the volatility of an investment relative to the market.

The cost of equity is an important factor in determining the value of a company's stock. The higher the cost of equity, the lower the value of the stock. This is because investors require a higher return on their investment to compensate for the higher risk.

The cost of equity can also be used to make investment decisions. Investors can compare the cost of equity to the return of an investment to determine if the investment is worth making. If the return of the investment is greater than the cost of equity, the investment is worth making.

The cost of equity is a complex concept, but it is an important factor in financial decision-making. By understanding the cost of equity, investors can make better investment decisions.

In addition to the CAPM, there are other methods for calculating the cost of equity. One common method is the dividend discount model. The dividend discount model is based on the idea that the value of a stock is the present value of its future dividends. The cost of equity is calculated as the discount rate that is used to calculate the present value of the future dividends.

Another method for calculating the cost of equity is the capital structure model. The capital structure model is based on the idea that the cost of equity is a function of the company's capital structure. The capital structure model calculates the cost of equity as a weighted average of the cost of debt and the cost of equity.

The cost of equity is an important factor in financial decision-making. By understanding the cost of equity, investors can make better investment decisions.

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