A Fascinating Anomaly

On March 12th, I Tweeted that the level of VXN (CBOE NDX Volatility Index) was higher than that of VIX (CBOE Volatility Index) and reported that it was a highly unusual occurrence. At the time, I was not quite sure whether this was a fleeting anomaly or whether there was significance to it. Just over a month later, the anomaly persists, and frankly, I remain unsure what to make of it.

My concerns are that we are unable to say that we are truly in the clear as long as this situation persists. It also raises the worry that while many investors believe that we saw market capitulation a few sessions ago, we never really saw capitulation in the mega-cap stocks that dominate the Nasdaq 100 Stock Index (NDX)

There is a certain logic to the relative quiescence of VXN relative to VIX. About 47% NDX weight is concentrated in its top 6 components: Microsoft (MSFT), Apple (AAPL), Amazon (AMZN), Alphabet (GOOG, GOOGL), Facebook (FB) and Intel (INTC). Those stocks comprise about 20% of the weight of the S&P 500 Index (SPX). Furthermore, NDX has no financial or energy companies and little exposure to retail. Those sectors have been a drag on SPX.

Below are some graphs that illustrate the phenomenon. The charts immediately below show the relationship between VIX and VXN over the past year. The green area in the middle of the three graphs shows the recent period where VIX has exceeded VXN, while the bottom graph shows the exceedingly high correlation between the two indices. The high correlation is unsurprising, as markets tend to show increased correlation during times of dislocation and there is high degree of overlap between the SPX and NDX indices that underlie them.

(Click on image to enlarge)

VIX Index

Source: Bloomberg

While this is certainly unusual over the past year, I decided to examine the historical precedent for this type of behavior. It is indeed exceedingly rare and typically fleeting, as evidenced by the 14-year chart below:

(Click on image to enlarge)

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