VIX
The VIX, or CBOE Volatility Index, is a popular measure of the market's expectation of 30-day volatility implied by S&P 500 index options. It is often referred to as the fear gauge because it tends to rise during periods of market stress and uncertainty.
While the VIX is specific to traditional equity markets, similar volatility indices have been developed for crypto assets to measure market sentiment and expected volatility. These crypto volatility indices provide traders with a benchmark for assessing the overall risk environment in the digital asset space.
High values indicate increased fear and uncertainty, while low values suggest complacency. It is a widely followed indicator by both retail and institutional investors.
The index is a derivative of market option prices.