# Beta Calculator for Stock Finance

Instructions:Â Use this calculator to find out the Beta for the stock finance of a company in an excel sheet. Please input the Risk-free rate (%), Expected return of the market (%), Market rate of return in the form below:

## Definition of Stock Portfolio Beta

Beta in finance is a calculation of systematic risk or volatility of portfolio or security relative to the overall market risk. Beta is affiliated with market risk. Market Risk may also be called Beta.

## Beta for decision making

Î²=1

Î²>1

Î²<1

Where;

Î²=1 means Risk in portfolio security is equal to Market Risk

Î²=1 means when we invest in the market, we bear some risk. The same risk we have to bear when we invest in our portfolio. Let say, if we invest in a security whose Beta is 1 means we have to bear the same risk in the company as if we invest in the market.

Risk while investing in market = Risk while investing in a security whose Beta is one

Î²>1 means Risk in portfolio security is more than Market Risk

If we invest in portfolio security whose Beta is greater than one then we have to bear more risk in security as compare to the risk when we invest in the market e.g. beta of newly opened company > 1 i.e. more than the beta of market.

Risk while investing in portfolio security (whose Beta > 1) > the Risk while investing in the market.

B < 1 means Risk in XYZ company is less than Market Risk

If we invest in portfolio security whose Beta is less than one then we have to bear less risk in security as compare to the risk when we invest in the market e.g. Beta of an old and well-established security is less than one i.e. less than the market.

If Beta = -1 shows the opposite correlation with the market.

Risk while investing in a company (whose Beta > 1) > the Risk while investing in the market

## Beta Formula Finance

Expected return = Er = Rf + Î² (Rm– Rf)

Er    = Expected Return of Investment

Rf  = Risk-Free Return

Î²   = Market Risk Beta of Investment

Rm = Return when taking Risk from the Market

Rm– Rf = Market Risk Premium

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