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IV Rank and Percentile Calculation | (IV) Implied Volatility Rank and Percentile NSE Metrics Help Traders to Identify Level of Implied Volatility for Particular Underlying Asset | Register Free Today !

While dealing with options contracts on the NSE market, a trader has to consider various factors; IV rank and percentile are among them. Both these values help traders estimate the potential volatility in the underlying asset, thereby helping them build a strong strategy. Get Talkoption’s Implied Volatility Rank and percentile analysis tool to make better trading decisions.

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What is IV Rank and IV Percentile in Options Trading ?

Implied volatility, or IV, is among the crucial metrics while dealing with the options contracts in the NSE financial market. It influences trading strategies and risk management. IV Rank And Percentile helps traders gauge the relative value of volatility in the given timeframe. Therefore, in this article, we shall understand what Implied Volatility Rank and Percentile are, how traders use them to make effective trading decisions, how to interpret them, the IV Rank And Percentile formula, and most importantly, the difference between both.

Understand IV Rank and IV Percentile

IV Rank and Percentile are metrics used to evaluate the current level of implied volatility for a specific underlying asset relative to its historical IV. These metrics assist traders in gauging whether the current IV is relatively high, low, or average compared to its historical levels.


IV Rank : Implied Volatility rank represents the current implied volatility's position compared to the historical range over a specific period generally of the past 52 weeks.


IV Percentile : Denotes the percentage of time the current IV is below the recorded IV levels in the defined historical period.

How do Traders Use IV Rank and IV Percentile for NSE Options Trading ?

IV Rank : Traders often use the Implied Volatility Rank to identify trading opportunities. When the IV Rank is high, traders might sell options contracts to capitalize on the premium, expecting IV to decrease. Conversely, when the IV Rank is low, traders might consider buying options, expecting a potential increase in IV.


IV Percentile : Traders use the Implied Volatility Percentile to assess the potential risk attached to the current IV level. A high IV percentile suggests that the Implied volatility of the underlying asset is relatively high, indicating high option premiums and potential trading opportunities in NSE

IV rank and percentile calculation formula

How to Interpret IV Rank and IV Percentile ?

High IV Rank or IV Percentile :

The high value of IV rank and percentile suggests that the current implied volatility is elevated compared to historical levels, potentially indicating overpriced options.


Low IV Rank or IV Percentile :

The low (IV) Implied volatility rank and percentile value imply that the current implied volatility is relatively low compared to historical levels, suggesting potentially underpriced options.


This information helps traders to build profitable options trading strategies. Also, one must consider other factors, such as fundamental, technical analysis and other parameters.

How to Calculate IV Rank and IV Percentile ?

  • To find out one year IV rank, use the below formula : Current IV – Low IV of the given period / Maximum IV of the period – low  IV of the period * 100. 

  • To find out the IV percentile, use the below-mentioned formula : Number of days with Implied volatility lower than current IV / Number of days in the selected timeframe * 100 

Understand the Difference Between IV Rank and IV Percentile

IV Rank :

  • Implied Volatility Rank is a metric that represents the current implied volatility (IV) of an underlying asset relative to its historical IV range.

  • It is expressed as a percentage and indicates where the current IV stands within the stock's recent (IV) Implied Volatility rank history.

  • The formula for the IV rank involves dividing the current IV by the highest IV observed during a defined historical period and converting the result into a percentile ranging from 0 to 100%.


IV Percentile :

  • Implied Volatility Percentile is a measure that compares the current IV of an underlying asset to its historical IV values and expresses it as a percentile.

  • It indicates the percentage of time in the past when the IV has been lower than the current IV.

  • IV percentile is calculated by comparing the current IV to the IV levels observed over a specific historical period and converting it to a percentile ranging from 0 to 100%


Thus, we have seen that the Implied volatility Rank compares the current IV to the stock's highest IV within a historical period, providing a relative ranking as a percentage. The implied volatility percentile compares the current IV to historical IV values. It gives the percentage of time the IV has been lower than the current level within a defined historical period. In simpler terms, one shows the varying amount, and the other shows the time. Register free and use Talkoption’s IV rank and percentile NSE tool to make informed trading decisions in NSE​

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