Using VIX Thresholds to Classify Volatility Levels

Summary

The response offers VIX thresholds as a practical way to describe market volatility levels. It cites historical and practitioner conventions in which readings around 20 indicate heightened concern and readings above 30 are associated with significant market stress. It also presents a three-band classification: low volatility at or below 12, a middle range above 12 through 20, and high volatility above 20.

These cutoffs are rules of thumb, not a universally established regime definition. The response itself notes that the cited discussion of VIX does not specify formal regimes. Thresholds depend on the chosen purpose and context, and the post does not compare alternatives such as realized volatility, rolling percentiles, or statistically estimated regime models. The suggested bands are specific to VIX and should not be treated as general volatility thresholds for other assets or measures.

Key ideas

• VIX readings above 20 are presented as a practical sign of heightened concern.
• The response gives low, middle, and high VIX bands with cutoffs at 12 and 20.
• A reading above 30 is described as reflecting significant market stress in the cited discussion.
• The thresholds are practitioner conventions, not a formal or universal regime model.

Tags

# What define if volatility is high or not?


# What define if volatility is high or not?












How is volatility regimes commonly defined in the literature? What are metrics used to define high volatility regime?

## Answer by Content_Quantinsti (score 1)

https://quant.stackexchange.com/a/80959

Academic and Industry References Whaley (2009) in his seminal paper on the VIX noted that the index's historical average was around 20, with significant market stress reflected when the VIX was above 30. He didn’t define exact "regimes" but suggested that the VIX above 20 signaled heightened market concern.

CBOE Documentation: The Chicago Board Options Exchange (CBOE) itself provides educational resources on the VIX, often using 20 as a threshold for higher market stress.

Practitioner Insights: A 2020 article by Goldman Sachs classifies a "low volatility" regime when the VIX is below 15 and "high" when the VIX is above 20.

Low Volatility: VIX ≤ 12 (calm, stable markets). Medium Volatility: 12 < VIX ≤ 20 (normal market fluctuation). High Volatility: VIX > 20 (stress, uncertainty, corrections).

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