What is the difference between portfolio beta and stock beta?

Portfolio beta is the measure of an entire portfolio’s sensitivity to market changes while stock beta is just a snapshot of an individual stock’s volatility. Since a portfolio is a collection of multiple stock holdings the formulas used to calculate beta for each will look different.

What is portfolio beta?

Portfolio Beta is a measure of the systematic risk of a portfolio of securities relative to a market benchmark (i.e. the S&P 500). For a portfolio of investments, the portfolio beta is the weighted average of the beta coefficient of all individual securities in the portfolio. How to Calculate Portfolio Beta?

How do you calculate the beta of a hypothetical portfolio?

Here are the steps you’d follow to calculate the Beta of a hypothetical portfolio: 1. Calculate the total value of each stock in the portfolio by multiplying the number of shares that you own of the stock by the price of its shares: Stock ABB: 500 shares X $20 a share each = $10,000. 2.