Volatility is an indicator that characterizes the variability of prices. If the price changes quickly, unevenly and with a large spread during a given period, it means that the volatility is high. And vice versa
For the world of finance and investment, volatility is the most important concept that characterizes a particular asset. Since any commodity on the market - oil, precious metals, stocks, bonds, currency, etc. - has a price, then the volatility can be determined for each of them.
Volatility is one of the key ways to assess risk for investors, so depending on the degree of volatility of an asset, investors can use different strategies for investing money. Thus, the higher the volatility, the higher the risks associated with the investment object.
Volatility is not just the distance between the lows and highs of the price, but the amount of deviation from the trend of the asset.
The volatility is different
Financier and specialist in trading and investment operations Simon Vine in his book "Options. The full course for professionals" divides volatility into three types:
- historical volatility - the actual volatility of the product price during a certain historical period of time; as a rule, on average, historical volatility is considered in the period from 12 months;
- expected volatility - a market estimate of volatility for the future;
- expected historical volatility -the "chronicle of forecasts" of expected volatility.
How to calculate volatility
There are several ways to quantify volatility. One of the most common is through the standard deviation. To measure volatility in this way, as a rule, the price growth for the period is taken, and the indicator of volatility will be the value by which the average daily price change deviated from the average increase.
For example, an average of about 250 trading days a year, including weekends and holidays. For simplicity of calculation, let's take that two shares have risen in price by 25% over the year. So, on average, their growth per day was equal to 0.1%. Let's say, on average, the price of the first stock rose by 0.2%, then fell by 0.1% per day, and the other one had more significant fluctuations — then the average daily increase by 1.1%, then the average daily decrease by 0.9%. In the first case, the standard deviation is 0.1%, and in the second - 1%. Then the annual volatility of the first stock will be calculated: 0.1%x√250 = 1.58%. The volatility of the second share will be 1%√250 = 15.81%.
In other words, both stocks ended the year with the same result - 25%. But the volatility of the first one was relatively insignificant-1.58%. But the fluctuations in the prices of the second share were almost proportional to the annual result of 25% and amounted to 15.81%. In the second case, we can talk about the strong volatility of the stock.
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Another fairly common way to measure volatility is to calculate the Average True Range, or ATR. This method does not show deviations from the average value, as the previous one, but the magnitude of the fluctuations themselves. The calculations are simple, but they consist of two steps.
The first step is to calculate the true range (TR). The greater of the three values is taken as the true range:
- the difference between the maximum and minimum price of a period, say, a trading day;
- the difference between the maximum value of the period and the closing price of the previous period;
- the difference between the minimum value of the period and the closing price of the previous period.
The second step is to calculate the average value of the true range for several trading periods, for example, for 14 days. This method will not allow you to compare the volatility of several stocks due to the fact that the stock prices are different. But it will allow you to see changes in the volatility of an individual stock or index.
Why is volatility increasing
The volatility of the price of a particular asset increases, as a rule, under the influence of three factors, writes The Balance publication.
- Seasonality. As an example, we can cite the tourism business. Most tourist destinations experience "low season" and "high season"during the year. In the first case, due to low demand, prices for tickets and vouchers fall, in the second-they grow due to an increase in demand.
- Weather. The weather factor often affects agricultural products. Good or bad weather affects the yield, which creates a shortage or oversupply in the market, which directly affects prices.
- Emotions. On the emotions of investors, a product such as oil, for example, rises or falls in price. As an example, The Balance cites the events of 2012, when the United States and European countries threatened Iran with sanctions, and Tehran in response promised to close the Strait of Hormuz. The closure of this strategically important route could lead to disruptions in global oil supplies and its shortage. And although there was no closure of the strait and the subsequent deficit, prices still soared to $110 in March 2012 on the fear of traders. Three months later, the price of a barrel fell to $80 — this time traders were afraid of an oversupply of oil on the market due to the slowdown in economic growth in China.
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The currency is subject to fluctuations due to changes in the key rate and other changes in the policy of the Central Bank, the political situation in the country and the world as a whole, sanctions, oil prices, the actions of currency speculators. In a situation with the volatility of shares, the securities of each company are affected by corporate news, which can be separated into a separate category of factors affecting volatility for this type of asset.
How volatility is tracked
There are many ways to monitor the volatility indicators of a particular instrument. One of the most popular is the volatility index (or VIX), which was introduced by the Chicago Board Options Exchange (or CBOE) in 1993. The peculiarity of this indicator is that it reflects the market's expectations for the volatility of the S&P 500 index for the next 30 days. Since the S&P 500 index is calculated based on the value of the 500 largest US companies, the VIX index can be called a large-scale indicator of investors ' expectations regarding the US market. The VIX is also called the "fear index" - if its values are high, this indicates that investors are afraid of high volatility of the S&P 500 index in the coming month.
The VIX shows the state of the market, its direction and mood. The pattern of the indicator is as follows: when the market falls, the volatility index increases, and when the market grows, the volatility index decreases. There is a saying on the market about this: "If the VIX is high, it's time to buy. When the VIX is low, look out below!»
Read more: What is the Volatility Index (VIX)?
According to the basic theory, if the VIX value is above 40-45, it indicates a panic in the market and investors are fleeing from risky assets. Such situations develop when prices are at lows and it's time to think about long-term purchases. If the value falls to 20 or below, then there is a growing trend in the markets and it seems that this will be the case for a long time. And then you can already think about closing long positions .
In addition to the most popular VIX index, there are a number of other well-known volatility indices:
- VXO - the index that was used before the VIX based on the S&P 100;
- VXD - a similar VIX index based on the Dow Jones 30;
- VXN - NASDAQ-based Volatility Index;
- RVX - Russell 2000 Volatility Index;
- VXEEM - Emerging Market ETF Volatility Index;
- OVX - Oil Volatility Index;
- GZV - Gold price Volatility index;
Volatility by examples
In March 2020, at the height of concerns related to the development of the COVID-19 coronavirus pandemic, the VIX index approached the record that was set in the fall of 2008 during the mortgage crisis in the United States. The "fear index" jumped to 85.47 points. Since the beginning of March and until March 18, 2020, the VIX has more than doubled.
This happened against the background of the collapse of American stock indexes. On March 16, the Dow Jones Industrial Average index lost almost 3 thousand points, which was the worst day for the indicator since the collapse of 1987, which was called "black Monday". Investors began to sell risky assets - stocks - in a panic, fearing a global quarantine that could cause serious damage to the global economy (and, therefore, to the performance of large international companies, which would inevitably affect the quotes). Market fears at that time were reinforced by US President Donald Trump, who wrote on Twitter that the peak of morbidity in the country could last until August 2020 and that the American economy was heading for a recession .
The VIX index showed an absolute minimum in 2017: on November 3, the index fell to 9.14 points, which was the lowest level in the history of calculations.
How to use volatility in stock trading
On the one hand, high volatility makes it possible to earn more on the market. With large price fluctuations, it increases, so the difference in the purchase and sale price at which you can make a profit increases. However, you will be able to earn more only if you can predict the direction of the market and the price movement of your asset. If you can't make an accurate forecast, then the risks of losses increase dramatically. Then volatility only harms.
Knowledge and understanding of volatility is important for identifying the minimum and maximum prices for an asset. If there is no important news, the asset will move within its average volatility. For example, if the share price changes within ± 1% during the day, it is unlikely that it will start changing within ±3% in the next few days. You need good reasons for this.
Usually, periods of low volatility in the market are replaced by periods of its surge. To reduce the risk of losses, many traders prefer to enter the market during periods of calm and wait for an increase in activity, and therefore the scope of price fluctuations. And this is the most correct tactic.
Below are a few trading principles taking into account market volatility.
- If the volatility is low, it means that the order book on the exchange is balanced — that is, the price will not change as long as the trading volume remains the same. If the number of sellers or buyers suddenly increases, the price may change dramatically.
- If the volatility is high, it is very dangerous to enter the market. You need to understand that the moment is lost. It remains to wait for the next opportunity to buy securities.
- Low and decreasing volatility are characteristic of price growth. If the volatility continues to decline, this may be a "bullish" sign.
- If the volatility increases, it indicates an increase in nervousness in the market. The market offers good opportunities for opening positions, but the risks of losses are also becoming higher.
Read more: How to determine the beginning of the movement of the "bull" market?
George Soros and his provocation of the volatility of the British pound
The success story of George Soros is an extreme, but at the same time one of the most striking examples of how an investor managed to make money on high volatility. In 1990, few people knew the name of this businessman, and Europe did not yet have a single currency. But even then, the countries of the Old World were thinking over schemes of economic unification. They wanted to create a common market that could compete with the United States.
At that time, there was a mechanism for regulating exchange rates in Europe. This system prevented large fluctuations in European currencies. If the deviations, which were then tied to the German mark, exceeded 2.25%, the state had to intervene and artificially adjust the exchange rate.
In 1990, the United Kingdom joined this system — now it also had to keep the value of its currency in a clear range. By 1992, the pound sterling was highly overvalued against the mark and at the same time was trading at the lower limit of its range. This is what George Soros, the head of his own hedge fund Quantum Fund, drew attention to.
Soros and the analysts of his fund realized that sooner or later the British currency could collapse. Therefore, until this happens and London artificially holds the exchange rate, you can start speculating on the pound, putting pressure on the currency and pushing it to collapse. The goal is simple: you can make good money on the difference in the exchange rate after the collapse.
First, Soros put $1.5 billion on a" short sale " of the pound. That is, he borrowed, and then sold the pound to keep the difference for himself. In this way, he provoked an excess of the British currency on the market and a decline in its exchange rate. Then the Quantum Fund went all-in and increased the short rate to $10 billion.
The British government tried to fight speculators by buying the pound on the market, but the country did not have enough money for this. The fact is that after Soros, the pound began to sell the whole world. Soon, the UK gave up trying to save the pound from falling, let the currency float freely and withdrew from the exchange rate containment agreement. As a result, the pound lost 25% against the dollar. The Soros Fund earned about $7 billion on the difference.
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