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.
Volatility Index is a good indicator of the investors’ perception on how volatile markets are expected to be in the near term. Usually, during periods of market volatility, market moves steeply up or down and the volatility index tends to rise. As volatility subsides, option prices tend to decline, which in turn causes volatility index to decline.
India VIX is a volatility index based on the Nifty 50 Index Option prices. From the best bid-ask prices of Nifty 50 Options contracts, a volatility figure (%) is calculated which indicates the expected market volatility over the next 30 calendar days.