# How do you calculate the standard deviation of a portfolio return?

## How do you calculate the standard deviation of a portfolio return?

Table of Contents

How to Calculate Portfolio Standard Deviation?

1. Find the Standard Deviation of each asset in the portfolio.
2. Find the weight of each asset in the overall portfolio.
3. Find the correlation between the assets in the portfolio (in the above case between the two assets in the portfolio).

What’s the standard deviation of a portfolio?

Definition: The portfolio standard deviation is the financial measure of investment risk and consistency in investment earnings. In other words, it measures the income variations in investments and the consistency of their returns.

### How do you find standard deviation with probability and return?

Like data, probability distributions have standard deviations. To calculate the standard deviation (σ) of a probability distribution, find each deviation from its expected value, square it, multiply it by its probability, add the products, and take the square root.

How do you use standard deviation formula?

1. The standard deviation formula may look confusing, but it will make sense after we break it down.
2. Step 1: Find the mean.
3. Step 2: For each data point, find the square of its distance to the mean.
4. Step 3: Sum the values from Step 2.
5. Step 4: Divide by the number of data points.
6. Step 5: Take the square root.

## What is a good standard deviation for a portfolio?

Standard deviation allows a fund’s performance swings to be captured into a single number. For most funds, future monthly returns will fall within one standard deviation of its average return 68% of the time and within two standard deviations 95% of the time.

How do you find the standard deviation of a stock?

The calculation steps are as follows:

1. Calculate the average (mean) price for the number of periods or observations.
2. Determine each period’s deviation (close less average price).
3. Square each period’s deviation.
4. Sum the squared deviations.
5. Divide this sum by the number of observations.

### What is portfolio standard deviation?

How do you find the variance and standard deviation of a portfolio?

To calculate the portfolio variance of securities in a portfolio, multiply the squared weight of each security by the corresponding variance of the security and add two multiplied by the weighted average of the securities multiplied by the covariance between the securities.

## What is the standard deviation of a fully diversified portfolio?

d. With 100 stocks, the portfolio is well diversified, and hence the portfolio standard deviation depends almost entirely on the average covariance of the securities in the portfolio (measured by beta) and on the standard deviation of the market portfolio….Answers to Practice Questions.

1996: 19.2%
2000: -12.1%