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What Is the ‘VIX’ Index?

The VIX (CBOE Volatility Index) is a real-time index that represents the market's expectation of 30-day forward-looking volatility. It is calculated based on the prices of a wide range of S&P 500 index options.

Often called the 'fear gauge,' a high VIX suggests high market uncertainty and volatility.

What Is the “VIX” Index and How Does It Relate to Implied Volatility?
What Is the Significance of the VIX Index in Relation to Implied Volatility and Market Risk?
How Does the VIX (Or a Crypto Equivalent) Relate to the IV of ATM Options?
If the BTC Call Premium in the Example Is $3,500, What Is the Time Value?