VIX
Volatility Index is a measure of market's expectation of volatility over the near term. Volatility is often described as the "rate and magnitude of changes in prices" and in finance often referred to as risk. Volatility Index is a measure, of the amount by which an underlying Index is expected to fluctuate, in the near term, (calculated as annualised volatility, denoted in percentage e.g. 20%) based on the order book of the underlying index options.India VIX is a volatility index based on the NIFTY Index Option prices. From the best bid-ask prices of NIFTY Options contracts, a volatility figure (%) is calculated which indicates the expected market volatility over the next 30 calendar days. India VIX uses the computation methodology of CBOE, with suitable amendments to adapt to the NIFTY options order book using cubic splines, etc.
The VIX Measures FEAR
High VIX readings mean that fear is also high, whereas low VIX readings mean that fear is low. Backtesting various VIX reversal signals has proven that the VIX can be used to predict market direction about 60 to 70% of the time, the more VIX signals the better. What this means is that when the VIX is at an extreme (meaning everyone thinks the market will continue in that direction), a top or bottom is usually in place and what usually happens is the market reverses in the opposite direction.
Volatility (VIX) Tends to Trend
This means that if the VIX rises today, it has a higher than average chance of rising tomorrow. This is even more significant at market extremes and right before market reversals.
The VIX is Dynamic
What this means is that you can not predict market direction simply by the level of the VIX. In the past, many traders simply bought the market when the VIX goes above 30 and sold the market when it traded down to 20. Because the VIX and volatility is constantly changing this strategy simply doesn't work. Now, more than ever, it is the relative level of the VIX that is important, not the absolute value.
Volatility is Mean Reverting
This means that periods of high volatility will be followed by periods of low volatility. This was academically proven over 50 years ago and is one of many market truths. This is important because when the VIX has a low reading and begins to revert to its mean, it is also accompanied by a market that begins to sell off. It is the same for when the VIX has a high reading and changes direction, this typically is accompanied by a market that begins to rally.
VIX Reversal Signals
There have been many books written about the VIX and signals have been developed that help traders pinpoint when the market is most likely to reverse. What all of these signals have in common is that they use various means to determine when the VIX is at an extreme and either reversing or about to reverse. While historically these individual VIX Signals have worked 60 to 70% of the time, that is no longer the case in today's market. Why is this? Because EVERYBODY knows about them and is watching them. Whenever a system or strategy becomes known to too many people, it often fails to live up to the results it once had. However, that being said, when multiple VIX Signal are generated, there is still a very high probability of the market reversing.
Practical Importance of VIX for tracking the market:-
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