Volatility of Volatility (Vol-of-Vol)
How much implied volatility itself fluctuates
What is Volatility of Volatility (Vol-of-Vol)?
Volatility of Volatility (Vol-of-Vol) Volatility of volatility (vol-of-vol) measures how much implied volatility itself fluctuates over time, capturing the second-order uncertainty in options markets. The CBOE publishes the VVIX index, which applies the VIX methodology to VIX options to measure the expected volatility of the VIX itself. High vol-of-vol indicates that the market is uncertain not just about future prices, but about the future level of uncertainty itself. How it works: Just as implied volatility measures expected price fluctuations, vol-of-vol measures expected volatility fluctuations. The VVIX typically ranges from 80 to 130 in normal markets, with spikes above 150 during crises. When VVIX is elevated, VIX options are expensive because the market expects large swings in the VIX. This matters for anyone trading volatility products: high VVIX means the cost of hedging with VIX calls is elevated, while low VVIX makes volatility hedges relatively cheap. For example, suppose the VIX is at 16 and the VVIX is at 85. This indicates a calm environment where the market expects the VIX to remain relatively stable. A month later, the VIX might still be at 16 but the VVIX has risen to 120. The same VIX level now carries more uncertainty: the market is pricing a higher probability of a VIX spike. A VIX $25 call that cost $0.80 in the first scenario might cost $1.40 in the second, purely because vol-of-vol has increased. Vol-of-vol directly affects the pricing of vomma-heavy positions. Portfolios with significant vomma exposure (such as far OTM options or VIX option positions) benefit from high vol-of-vol because their vega will increase if realized volatility swings widely. Institutional traders monitor VVIX alongside VIX to distinguish between environments where volatility is low and stable versus low and fragile. The ratio of VVIX to VIX can signal when the market is complacent and vulnerable to a volatility shock, even when headline VIX levels appear benign.
Complete Definition
Volatility of volatility (vol-of-vol) measures how much implied volatility itself fluctuates over time, capturing the second-order uncertainty in options markets. The CBOE publishes the VVIX index, which applies the VIX methodology to VIX options to measure the expected volatility of the VIX itself. High vol-of-vol indicates that the market is uncertain not just about future prices, but about the future level of uncertainty itself. How it works: Just as implied volatility measures expected price fluctuations, vol-of-vol measures expected volatility fluctuations. The VVIX typically ranges from 80 to 130 in normal markets, with spikes above 150 during crises. When VVIX is elevated, VIX options are expensive because the market expects large swings in the VIX. This matters for anyone trading volatility products: high VVIX means the cost of hedging with VIX calls is elevated, while low VVIX makes volatility hedges relatively cheap. For example, suppose the VIX is at 16 and the VVIX is at 85. This indicates a calm environment where the market expects the VIX to remain relatively stable. A month later, the VIX might still be at 16 but the VVIX has risen to 120. The same VIX level now carries more uncertainty: the market is pricing a higher probability of a VIX spike. A VIX $25 call that cost $0.80 in the first scenario might cost $1.40 in the second, purely because vol-of-vol has increased. Vol-of-vol directly affects the pricing of vomma-heavy positions. Portfolios with significant vomma exposure (such as far OTM options or VIX option positions) benefit from high vol-of-vol because their vega will increase if realized volatility swings widely. Institutional traders monitor VVIX alongside VIX to distinguish between environments where volatility is low and stable versus low and fragile. The ratio of VVIX to VIX can signal when the market is complacent and vulnerable to a volatility shock, even when headline VIX levels appear benign.
Related Terms
Frequently Asked Questions
What is volatility of volatility?
Volatility of volatility measures how much implied volatility itself fluctuates. The CBOE VVIX index tracks this by measuring the expected volatility of VIX options. High vol-of-vol means the market expects large swings in volatility levels, while low vol-of-vol suggests stable volatility expectations.
What does the VVIX index tell traders?
The VVIX index indicates how expensive VIX options are relative to the VIX level. High VVIX (above 120) means VIX options are pricing in large expected swings, making volatility hedges expensive. Low VVIX (below 90) indicates calm expectations and cheaper VIX options. VVIX spikes often precede or accompany market stress events.
How is vol-of-vol different from implied volatility?
Implied volatility measures expected price fluctuations of the underlying asset. Vol-of-vol measures expected fluctuations in implied volatility itself. Think of it as uncertainty about uncertainty. A stock can have low IV (market expects small moves) but high vol-of-vol (market is unsure whether that calm will persist or suddenly break).
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