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Volatility is a measure of the variability of returns for a given security or market index. It is usually expressed in terms of standard deviation, and it can be used to measure the riskiness of an investment. In this blog post, we will explore different measures of volatility and discuss which one is the best indicator of risk.
How is volatility measured?
There are a number of ways to measure volatility, but the most common is standard deviation. Standard deviation measures how much a security’s price varies over time. The higher the standard deviation, the more volatile the security. Sometimes, volatility can also be expressed in variance. Variance is simply the square of the standard deviation.
Another popular measure of volatility is beta. Beta measures a security’s volatility in relation to the market. A security with a beta of one is just as volatile as the market. A security with a beta of less than one is less volatile than the market, and a security with a beta of more than one is more volatile than the market.
Volatility can also be calculated from options prices. The price of an option is based on a number of factors, one of which is the underlying security’s implied volatility. The higher the implied volatility, the higher the option price.
Why is volatility important?
Volatility is important because it can be used to measure risk. The higher the volatility, the riskier the investment. That’s why it’s important to understand how volatility is measured and which measure is the best indicator of risk.
So, which is the best measure of volatility?
There is no easy answer, as each measure has its own pros and cons. Standard deviation is a simple and widely used measure, but it can be affected by outliers. Beta is a good measure of market risk, but it doesn’t tell you how volatile a security is on its own. Options prices are a good measure of implied volatility, but they can be affected by other factors.
How many types of volatility are there?
As we have seen, there are a number of ways to measure volatility. But what about different types of volatility?
There are two main types of volatility – historical and implied. Historical volatility is a good measure of how volatile a security has been in the past. However, it doesn’t tell you anything about how volatile the security will be in the future.
Implied volatility is a measure of how much the market thinks a security will move in the future. It is based on the prices of options on the security. However, it can be affected by other factors, such as the price of the underlying security.
In conclusion, there is no easy answer to which is the best measure of volatility. each measure has its own pros and cons. It is up to the individual investor to decide which measure is most important to them.
What do you think? Do you have a favorite measure of volatility? Let us know in the comments below.
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