What it means
The VIX is often called the fear gauge. It is calculated from the prices of options on the S&P 500 index, a basket of large US companies, and it reflects how much traders are willing to pay for protection against large moves.
The number is quoted in percentage points on an annualised basis. A reading of 20, for example, implies that the market expects the index to move up or down by about 20% over a year, with a typical one-standard-deviation range.
A low VIX suggests that investors expect calm conditions, while a high one suggests they expect larger swings. Readings tend to spike when markets fall sharply, because demand for protective options rises, and then drift back down when conditions settle.
The VVIX works one level up. It is calculated from options on the VIX and shows how much traders expect the VIX to change, which makes it useful for those who trade volatility products or manage portfolios that are sensitive to sudden shifts in market mood.
For a business or a finance manager, these indices are a context tool, not a forecast. They help to explain why a portfolio may be moving more than usual, to judge the cost of hedging, and to describe market conditions in a board paper.
An important nuance is that the VIX measures expected movement in either direction, not just falls. It also reflects the price of options, which can be influenced by supply, demand and investor positioning, so it is a market estimate and not a promise of what will happen.
In practice
Real-world examples.
Example
A treasury manager sees the VIX jump from 14 to 32 after a sudden market fall. She delays a planned equity purchase by a week and asks her bank for hedging quotes, noting that protection is now more expensive. She records the reason for the delay in her treasury report.
Example
A financial controller prepares a quarterly board paper on the company's pension assets. She includes the average VIX level for the quarter to explain why the portfolio value was more volatile than usual. The directors find it easier to see that the market, not manager error, caused the swings.
Example
A hedge fund analyst follows the VVIX alongside the VIX before a major central bank announcement. A high VVIX tells her that traders are uncertain about how the VIX itself will respond. She reduces her position size and sets tighter loss limits.
Formula
Calculation
Expected one-standard-deviation move over a period = VIX / square root of the number of periods in a year
Suppose the VIX reads 20 and an investor holds a $500,000 portfolio that tracks the S&P 500. There are 12 months in a year and the square root of 12 is about 3.46, so the implied monthly move is 20 / 3.46, which is about 5.8%. On $500,000 this is about 500,000 x 5.8% = $29,000. This means the market is pricing a range of roughly plus or minus $29,000 over the next month for about two thirds of outcomes, and larger moves remain possible.Case study
Seen in the real world.
Redwood Capital Partners is an illustrative, fictional investment firm managing money for a small group of families. Its risk committee had no rule linking portfolio decisions to market conditions, and meetings often turned into debates based on headlines.
The chief risk officer proposed a simple dashboard that showed the VIX, its average for the past year and the VVIX. She agreed with the committee that a VIX reading well above its yearly average would trigger a review of risk limits, not an automatic sale.
During a period of market stress, the dashboard showed the VIX more than doubling within a month. The committee met, confirmed that the portfolios were within their limits and chose not to act on impulse. The illustrative lesson is that these indices are best used to structure a calm conversation about risk, not to trade on fear.
Watch out
Common mistakes.
- Treating the VIX as a forecast of a market fall, when it measures expected size of movement in either direction.
- Reading the annualised number as the expected move over the next day or month without scaling it to the period.
- Assuming a low VIX means no risk, since calm periods can end suddenly and low readings often come before sharp changes.
Questions
People also ask.
What is a high VIX reading?
There is no official line, but readings above about 30 are commonly seen as signs of stress, while readings in the low teens are seen as calm, and these levels are rules of thumb and not fixed boundaries.
What does the VVIX tell me that the VIX does not?
The VVIX shows how much traders expect the VIX itself to swing, which signals uncertainty about future volatility and is useful for those exposed to volatility products.
Can I invest directly in the VIX?
Not in the index itself, but there are futures, options and exchange-traded products linked to it, and these can behave differently from the index, so they carry their own risks.
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