India VIX sits above the Nifty's twenty day realised volatility on most sessions, and the two move together

India VIX sits above the Nifty's twenty day realised volatility on most sessions, and the two move togetherIndia VIX: from 12.5 at 1 Jul 2025 to 13.4 at 15 Sep 2026, high 27.9 at 30 Mar 2026, low 9.15 at 26 Dec 2025. Nifty 20 day realised vol: from 10.1 at 1 Jul 2025 to 7.27 at 15 Sep 2026, high 29.5 at 8 Apr 2026, low 5.21 at 1 Sep 2026.India VIXNifty 20 day realised vol51015202530Jul 2025OctJan 2026AprJul
India VIX and the Nifty's twenty day realised volatility, in percent a year, from 1 Jul 2025 to 15 Sep 2026. Each point is one session. Realised volatility is computed by RupeeCase from the NSE closes. Source: NSE end of day data, computed by RupeeCase. As of 15 Sep 2026.

In the daily data in this file, the change in India VIX and the change in the Nifty close were strongly negatively related. On most sessions when the index fell, VIX rose, and when the index rallied, VIX eased. That is the relation traders watch on a screen, but it describes one file, not a law.

The levels tell a different part of the story. The chart compares India VIX with the Nifty's twenty day realised volatility, the volatility the index actually delivered over the previous twenty sessions. The two rise and fall together, and the correlation of the levels is strongly positive, so implied and realised volatility follow one another.

VIX usually sits above realised volatility. Over this file, VIX was above the twenty day realised figure on most sessions. The gap is roughly what option sellers are paid, and it is what they lose when a move arrives faster than the price allowed for. The variance risk premium proper compares VIX with the volatility that follows it, so this chart is only a stand in, and the gap is not a fixed amount.

The relation is a description of the past. It does not say that the Nifty will fall on a given day because VIX has risen, and it does not say that a high VIX will be followed by a fall. The high VIX page shows the sessions that break the simple reading. The series ends on 15 Sep 2026.

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