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Beta in Finance

Beta in Finance

What is Beta in Finance?

Beta is a measure of the non-diversifiable risk of stock we can say that the Beta of a stock measures the sensitivity of the stock with reference to a broad-based market index. In a general way in a rising market, it is good to have high beta stocks and in a falling market, it is advisable to hold on to low beta stocks.

Formula

There are two-three ways by which Beat can be calculated and it also depends upon the data given:

Beta = Covariance between Stock and Market/Variance of the Market
Beta = (Standard Deviation of Stock / Standard Deviation of Market)* Correlation between Returns from Stock and Stock Market

Explanation

The beta of a stock is a measure of risk associated with it. The risk cuts across industries and affects all the companies operating in the market. It is the parameters of risk that an entity’s cash flows may be affected by factors that are beyond the control of the management of the entity. The changes in interest rate, inflation, taxation, political uncertainty, out of break of war, etc. affect all companies. The non-diversification risk reflects the sensitivity of an entity’s revenue to change in macroeconomic factors and depends on the degree of sensitivity of costs to total revenue. An entity with low revenue sensitivity i.e. where the revenues are relatively stable will carry a low-risk relative to another with high revenue sensitivity. Diversification in the market can reduce the beta of the stock. Investors can consider the risk by reviewing the risk of the stock.

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Examples of Beta in Finance (With Excel Template)

Let’s take an example to understand the calculation in a better manner.

You can download this Beta in Finance Excel Template here – Beta in Finance Excel Template

Example #1

Annual Rates of return of ABC ltd and the market rates of return are given below. Calculate the Beta coefficient value of the stocks of ABC.

Company abc

Solution:

Deviation in Market and Company is calculated as

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Deviation in Market and Company

Variance and Covariance is calculated as

Beta in Finance - 3

Beta in Finance is calculated using the formula given below

Beta in Finance = Covariance between Stock and Market/Variance of the Market

Beta in Finance - 4

  • Beta in Finance = 522/640
  • Beta in Finance = 0.82

Beta of the stock of ABC= 0.82.

Note: Market Value and Company Total is calculated as SUM/No. of years

Interpretation of Beta in Finance

  • Beta is a risk measuring tool by which an investor can make a decision of whether they are required to invest in the stock of a company or not.
  • The interpretation of the beta value is that if the beta of a stock is greater than 1, we call it a high beta stock. Such stocks are riskier than the stock market. They move faster than the movement in the stock market. If the market goes up, this stock goes up faster. If the market falls, this stock falls faster.
  • If the beta of the stock is less than 1, we call it a low beta stock. Such stocks are less risky than the stock market. They move slower than the movement in the stock market. If the market goes up, this stock goes up slower. If the market falls down, this stock falls slower.
  • Stocks with a beta of 1 are called unity stocks. Such stock mimics the market. They move in tandem with the market. If the market goes up by a certain percentage, this stock moves up by the same percentage. If the market falls by a certain percentage, this stock falls by the same percentage.

Uses and Importance of Beta in Finance

  • Beta helps measure the risk associated with the stock in case investors are planning to buy or sell them.
  • The beta value is itself an interpretation of the stock prices which are affected by the market conditions.
  • Beta can help the investors draw a line between a risky and risk-free asset.
  • The investors can decide between the two risky assets the premium for one risky asset with reference to another.
  • With the help of the beta value, the investors can seek a higher return for a risky asset.

Advantages and Disadvantages

Below are the points that explain the Advantages and Disadvantages:

Advantages

  • Beta measures the degree of responsiveness of expected return on a given security, relative to changes in the market movement.
  • Beta helps to make the decision very smooth for the investors.
  • Beta value can easily do the interpretation of the finance for the investors.
  • Beta value not only helps the investors but it also helps the management of the company to check its stock prices and as well as measures can be taken to minimize the same.

Disadvantages

  • Beta cannot be considered as the best tool.
  • Beta has limited predictive value in ascertaining future movements in share price vis-a-vis movements in the market.
  • Beta is based on past trends and data.
  • Investors should not rely on past data because the stock doesn’t depend on past data.
  • Falling back on the beta that was based on the price movement of the controlled price era will hence be unhelpful.

Conclusion

Beta measures only one portion of the volatility of return caused by systematic risk. It doesn’t measure the entire element that causes the variability in the return in an asset i.e. total risk. In practice, this is determined with the help of regression analysis relating returns on security to market returns. Beta depends on the past trend and which is not feasible.

Beta measures the stock‘s volatility with reference to the market index. Beta is also an indicator for the investors who want to invest in the stock of the company. Beta can easily differentiate between the risk-free asset and the risky asset. The investors will define the premium for one risky asset with reference to another. Investors can get an extra reward for taking the risk. The risk can be easily measured and can be considered by the investors and the market and also the company can take measures to control the prices of the stock.

Recommended Articles

This is a guide to the Beta in Finance. Here we discuss how to calculate along with practical examples. We also provide a downloadable excel template. You may also look at the following articles to learn more –

  1. Levered Beta Formula
  2. Unlevered Beta Formula
  3. What is Beta?
  4. Beta Formula
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