# How Do I Use the CAPM to Determine Cost of Equity?

## What Is the Capital Asset Pricing Model (CAPM)?

Knowing how to calculate the Cost of Equity is pretty important for business owners or managers. Corporate accountants and financial analysts frequently use the capital asset pricing model (CAPM) to assess the cost of shareholder equity in capital planning. CAPM is commonly used for pricing hazardous securities, generating expected returns for assets given the associated risk, and estimating costs of capital. It is defined as the link between systematic risk and expected return for assets.

You can read more about the Capital Asset Pricing Model to get a solid understanding of the concept.

## Cost of Equity Calculation

The risk-free rate, the rate of return for the general market, and the beta value of the stock in question are the only three pieces of information required by the CAPM calculation. The returns created by the market in which the company’s stock is traded are referred to as the rate of return. The market’s long-term rate of return is frequently referred to as the market rate of return. The risk level of an individual security in relation to the broader market is measured by its beta.

When the beta value is “one,” the stock moves in lockstep with the market. The individual security increases by 5% if the S&P 500 increases by 5%. A stock with a higher beta is more volatile, whereas one with a lower beta is more stable.

Because the value of this type of asset is extremely steady and the return is backed by the US government, the risk-free rate is often defined as the (more or less guaranteed) rate of return on short-term US Treasury bills. As a result, there is virtually no risk of losing invested funds, and a fixed level of profit is guaranteed.

## What the CAPM Can Tell You

The cost of equity is a component of the weighted average cost of capital (WACC), which is commonly used to calculate the total expected cost of all capital under various financing plans in order to find the most cost-effective debt and equity financing mix.

Assume Company ABC is a 9 percent return company that trades on the S&amp;P 500. With a beta of 1.2, the company’s stock is slightly more volatile than the market. Based on a three-month T-bill, the risk-free rate is 4.5 percent.

The cost of the company’s equity financing, based on this information, is:

4.5 + 1.2 (9 4.5) = 9.9%

## The Difference Between CAPM and WACC

The CAPM is a cost-of-equity calculation formula. The WACC is calculated using a calculation that includes the cost of equity. The WACC is a measure of a company’s cost of capital, which includes the cost of equity and debt.

## Limitations of Using CAPM

The CAPM has some drawbacks, such as deciding on a rate of return and which one to utilize. There’s also the market return, which is based on historical data and expects positive returns. This includes the beta, which is only available to companies that are publicly traded. The beta also only considers systematic risk, leaving out the risk that organizations experience in different markets.

There are also a number of assumptions that must be made, such as the fact that investors can borrow money at the risk-free rate without restriction. The CAPM also presupposes that there are no transaction fees, that investors hold a portfolio of assets, and that investors are only interested in a single period’s rate of return—all of which are not always true.

## Cost of Equity CAPM FAQs

### Is CAPM the Same As Cost of Equity?

The cost of equity — the rate of return a company ends up paying to equity investors — is calculated using the CAPM formula. The dividend capitalization model can be used to assess the cost of equity for companies that pay dividends.

### How Do You Calculate Cost of Equity Using CAPM?

The cost of equity can be calculated using the CAPM formula, which is as follows:

Cost of equity = risk-free rate of return + beta * (market rate of return – risk-free rate of return)

### What Are Some Potential Problems When Estimating the Cost of Equity?

The most difficult aspects of calculating the cost of equity are determining the market risk premium, the appropriate beta, and whether to use short- or long-term rates for the risk-free rate.

### How Are CAPM and WACC Related?

The whole cost of all capital (WACC) is the total cost of all capital. The CAPM model is used to estimate the cost of shareholder equity. The WACC can be determined by adding the CAPM-derived cost of equity to the cost of debt.

## The Bottom Line

CAPM is a tried-and-true methodology for evaluating the cost of shareholder equity for accountants and analysts. The model calculates the relationship between systematic risk and asset expected return, and it can be used in a variety of accounting and financial situations.