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

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

To find standard deviation on a mutual fund, add up the rates of return for the period you want to measure and divide by the total number of rate data points to find the average return. Further, take each individual data point and subtract your average to find the difference between reality and the average.

What is standard deviation of stock returns?

Standard deviation is the statistical measure of market volatility, measuring how widely prices are dispersed from the average price. If prices trade in a narrow trading range, the standard deviation will return a low value that indicates low volatility.

How do you calculate the standard deviation of a stock return in Excel?

In Excel, the formula for standard deviation is =STDVA(), and we will use the values in the percentage daily change column of our spreadsheet. In this example, our daily standard deviation is 1.73%. This represents the S&P 500’s daily volatility for August 2015.

### How do you find standard deviation of annual return?

The Annualized Monthly Standard Deviation is an approximation of the annual standard deviation. To approximate the annualization, we multiply the Monthly Standard Deviation by the square root of (12). We will begin by calculating the monthly returns every day for the past 5 years (1/1 – 2/1, 1/2-> 2/2, etc …).

What is the formula to calculate volatility?

How to Calculate Volatility

1. Find the mean of the data set.
2. Calculate the difference between each data value and the mean.
3. Square the deviations.
4. Add the squared deviations together.
5. Divide the sum of the squared deviations (82.5) by the number of data values.

When to use standard deviation in stock market?

The use of standard deviation to determine risk in the stock market is applied assuming that most of the market’s stocks’ price activities follow a normal distribution pattern. When stocks are following a normal distribution pattern, their individual values will place either one standard deviation below or above the mean at least 68% of the time.

## How is the standard deviation of a mutual fund reported?

Investment firms report the standard deviation of their mutual funds and other products. A large dispersion shows how much the return on the fund is deviating from the expected normal returns. Because it is easy to understand, this statistic is regularly reported to the end clients and investors. 