volatility index

Translations
индекс волатильности
The volatility index spiked during the financial crisis.
Индекс волатильности резко вырос во время финансового кризиса.
Definitions
The volatility index, often referred to as the VIX, is a measure of the market's expectation of future volatility based on options prices of the S&P 500 index. It reflects investor sentiment and market uncertainty, with higher values indicating greater expected volatility and lower values suggesting a more stable market.